circuit breaker

I N N O V A T I V E S O L U T I O N S I N S E N S O R S A N D C O N T R O L S

Precision ProductsAircraft Circuit Breakers

7270-7

7271-8

7271-3

Aircraft Circuit Breakers

2TC14 2TC663TC14

5TC50

3TC7

6TC9TC

2TC49

6752-12 6752-305 6752-100

7277-2

7277-1

20TC

7274-2 7274-4 7274-11 and 7274-69

3SB2

3SB4

7270-1

Sensata is the leading supplier of circuit breakers to the global aircraft industry and has established theindustry standard for quality, reliability, andperformance. Sensata has pioneered virtually all of the aircraft circuit breakers styles used in today’saircraft. Sensata’s complete line of circuit breakers o�ers a broad selection of types, features and design options.

• Single pole or three pole versions• Ratings from 1⁄2 to 100 amps • Trip free design• Temperature or non-temperature compensated

Applications

Sensata’s broad circuit breaker product line is ideal forthose rugged applications that require a high level ofreliability and performance as well as excellentvibration and shock resistance including:

• Power distribution systems on commercial andmilitary aircraft

• Ground support equipment• Avionics• Missile launcher systems• Aircraft simulators• Power distribution systems on military vehicles

Overview Index

Sensata Number

Guide ....................................................................2TC, 3TC ..............................................................6TC, 9TC............................................................... 2TC49 ...................................................................5TC .......................................................................6752 ......................................................................6752-100 ...............................................................3TC7......................................................................7274-2,-4,-11,-69 ..................................................7277 ......................................................................20TC .....................................................................7270-1, 7271-8 .....................................................3SB2, 3SB4............................................................Arc Fault ..............................................................Cross Reference ...................................................Glossary ................................................................

Page

2, 34, 56, 78, 9

10, 1112, 1314, 1516, 1718, 19

2021

22, 2324, 2526, 27

2829

Sensata maintains a complete line of MS and customerapprovals on most major aircrafts worldwide. Due tospace limitations, these con�gurations cannot all beshown.

7276 style aircraft circuit breaker is not shown in thecatalog.

• Excellent vibration and shock resistance• Quali�ed to global commercial and

military standards • Optional auxiliary switch• Thermal and magnetic sensing• Push button, toggle or rocker switch• Long push button• Various terminal con�gurations• MS and commercial con�guration• Manual reset• 28VDC or 120VAC, 400 Hz

For more information contact our product manager:Tel: (508) 236-3573

For more information on circuit breakers contact:Tel: (508) 236-3536

Website address: www.sensata.com

Condensed Aircraft Circuit Breaker Guide This guide gives a brief description of most circuit breakers manufactured by Sensata Technologies. For more information,

please consult the appropriate section of this catalog.

CIRC

UIT

BRE

AKE

RTY

PEN

UM

BER

TYPE

APP

ROVA

L

ACT

UAT

ING

OR

RESE

TM

EAN

S

MA

NU

AL

TRIP

IND

ICAT

ING

RATI

NG

IN A

MPS

MA

JOR

DIM

ENSI

ON

SIN

INCH

ESA

PPRO

X.L

x W

x H

APP

ROX.

WT.

ING

RAM

S

APP

ROX.

200%

TIM

E SE

CON

DS

TIM

E TO

TRIP

AT

TWIC

E RA

TED

CU

RREN

T

2TC3TC

5TC

6TC9TC2TC49

3TC7

6752-126752-1006752-3057274

7277

7270727120TC2

3SB

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Aircraft

Simulator

MS 3320MS 14105

––

MS 14154MS 14153M5809/1

MS 25244

MS 24571MS 25361

MS 26574MS 22073

––

MS 24509MS 24510

––

––

Button

Button

Button

Button

Button

Button

Button

Button

ToggleButtonRocker

Button

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

1 - 3515 - 35

20 - 50

2 - 251, 15 - 352.5 - 15

5 - 35

2.5 - 5050 - 1002.5 - 901/2 - 20

1/2 - 20

3 - 35

3 - 35

––

.75 x .56 x 1.21.10 x .75 x 1.2

1.65 x .77 x 1.92

.75 x 1.78 x 1.21.10 x 2.35 x 1.21.21 x .75 x .56

1.1 x .75 x 1.49

2.2 x .75 x 3.32.2 x .75 x 3.32.2 x 2.25 x 3.3.750 x .562 x 2.2

.750 x .562 x 2.2

1.37 x .75 x 2.251.37 x .75 x 2.002 x .750 x 2

.750 x .562 x 2.2

25.036.0

57.5 (std.)59.4 (aux.)

65.0110.0

25.0

38.9

91.091.0

292.028.032.025.0

39.0

39.0

30.0

1010

10

101010

35

35

10

10

505050

––

MIL Approved Aircraft Circuit Breakers

*Note: For cross reference information, refer to page 28.

MS Number

MS 3320MS 3320LMS 3320VMS 14105MS 14105LMS 14153MS 14154MS 14154L

Sensata Number

2TC22TC272TC633TC23TC279TC26TC26TC37

Page

4, 54, 54, 54, 54. 56, 76, 76, 7

MS Number

MS 14154VMS 5809/1MS 24571MS 24571VMS 25361MS 25361VMS 22073MS 22073V

Sensata Number

6TC632TC496752-126752-126752-1006752-1027274-117274-69

Page

6, 78, 912, 1312, 1314, 1514, 1518, 1918, 19

MS Number

MS 26574MS 26574AMS 26574LMS 24509AMS 24509BMS 24510AMS 24510BMS 25244

Sensata Number

7274-27274-47274-707270-17270-77271-87271-33TC7

Page

18, 1918, 1918, 1922, 2322, 2322, 2322, 2316, 17

FAU

LTIN

TERR

UPT

ING

CAPA

CITY

AM

PS @

VOLT

S&

CYC

LES

REMARKS TYPICAL APPLICATIONS

6000 @ 28 VDC2500 @ 120 VAC, 400 Hz6000 @ 28 VDC2000 @ 120 VAC, 400 Hz4000 @ 28 VDC2000 @ 115 VAC, 400 Hz2000 @ 120 VAC, 400 Hz2000 @ 120 VAC, 400 Hz6000 @ 28 VDC2500 @ 120 VAC, 400 Hz6000 @ 30 VDC3500 @ 120 VAC, 400 Hz

6000 @ 30 VDC120 VAC, 400 Hz

2000 @ 28 VDC500 @ 125 VAC, 400 Hz2000 @ 28 VDC500 @ 120 VAC, 400 Hz4000 @ 30 VDC3500 @ 120 VAC, 400 Hz2000 @ 30 VDC1000 @ 120 VAC, 400 Hz

––

Subminiature,ambient compensated 1 poleauxiliary switch available

Ambient compensated

Subminiature,ambient compensated, 3 poleDual Safety 2TC

Lightweight, high performance,non-ambient temperaturecompensated1 Pole – 6752-121 Pole – 6752-1003 Pole – 6752-305Quick acting, subminiatureauxiliary switch availableWide calibrationversion of 7274Toggle or push button

Rocker switch type

Push button

Aircraft power distribution

Aircraft, avionics, and electrical systems



Aircraft, avionics, and electrical systems

Aircraft power distributionground support

Aircraft power distribution,Avionics, ground support, missile systemsProtection of wire, motors, solenoids,transformers in electronicsAircraft power distribution

Combination circuit switching & protectionlight aircraft, electronics, vehiclesCommercial and military simulators

Condensed Aircraft Circuit Breaker Guide CI

RCU

ITB

REA

KER

TYPE

NU

MB

ER

2TC3TC

5TC

6TC9TC2TC49

3TC7

6752-126752-1006752-3057274

7277

7270727120TC2

3SB

For more information contact our product manager:Tel: (508) 236-3573

For more information on circuit breakers contact:Tel: (508) 236-3536

Website address: www.sensata.com

*Note: For FAA/PMA approved devices, go to www.klixon.com

Single Phase TC Series Circuit BreakersMiniature Ambient Compensated

Overview

Klixon® single-phase TC devicesare the smallest, lightest aircraftcircuit breakers available today.They represent “state-of-the-art”protection for today’s aerospacepower systems. Their light weightand small size make themespecially well suited for aircraft,avionics and electronic systems.

The Klixon trademark has set thestandard for aerospace circuitbreakers. Despite the small size,the TC series o�ers the enduranceand reliability required byexacting military speci�cations,and are available in standardcurrent ratings from 1 – 35amperes.

Coordination

The 2, 3, 6 and 9TC breaker rat-ings are coordinated so any ratingwill trip before another circuitbreaker, twice its rating, in theevent of a fault of up to 6000amps let-thru current. Thisresults in improved overall equip-ment performance, since only thesmallest faulted circuit is inter-rupted, while larger circuitsremain operational (see pages 6and 7 for 6/9TC details).

Ambient TemperatureCompensation

Ambient compensated circuitbreakers permit system designersto specify smaller gauge wirewhere the circuit breaker andwiring are exposed to di�erentambient temperatures. They areespecially suited for applicationswhere the ambient temperatureexceeds the 160oF maximum ofnon-ambient compensated thermalcircuit breakers. The TC seriesmay be applied where operatingtemperatures are as high as 250oF(121oC), with no derating of thecircuit breaker. This eliminates theneed for cooling air and allowssubstantial weight, space andcost savings.

Options*

• Longer push buttons

• High vibration

• Random vibration

• Metric mounting thread

• Metric terminal thread

• Dust boot†

• Auxiliary switch - male andfemale contacts available

• Terminal barriers

• Plug-in terminals

Trip Free

The complete line of TC seriescircuit breakers is trip free. Thecircuit breaker cannot be main-tained closed during an overloadeven with the actuator buttonheld closed.

High Short Circuit Capacity

For its miniature size, the 2/3TCseries o�ers unusually highcurrent interrupting capacity.Overloads up to 6000 amps at28 VDC or 2000-3500 amps at120 VAC, 400 Hz can be safelyinterrupted without a�ectingcalibration or operatingperformance in the standard2/3TC series.

Qualifications

MS3320 - 2TC2

MS3320L - 2TC27

MS3320V - 2TC63

MS14105 - 3TC2

MS14105L - 3TC27

European standards

SAE standards

All U.S. aircraft OEM’s

Most European aircraft OEM’s

* Contact factory for details† Part Number 14500-1 Fits 15/32 Bushing

Part Number 14500-5 Fits 7/16 Bushing

2TC14 2TC66 3TC14

Features

• Miniature size

• Light weight

• Trip free

• Mil-quali�cation

• Current rating 1-35 amperes

• Coordinated ratings

• High vibration resistance

• High interrupt capacity

TEMPoC

+25-54

+121

MIN ULTTRIP

115%115%

85%

MAX ULTTRIP

138%165%145%

TRIP TIME - SECONDS

200%4-167-352-13

500%.4-1.6.6-3.0

.25-1.0

1000%.10-.40.15-.70.06-.25

TEMPoC

+25-54

+121

MIN ULTTRIP

115%115%

85%

MAX ULTTRIP

138%165%145%

TRIP TIME - SECONDS

200%4-206-352-15

500%.40-1.7.55-3.0.25-1.0

1000%.10-.40.15-.70.06-.25

Vibration*....................... 10 G’s minimum, 50 - 500 HzMechanical Shock.......... 50 G’sAcceleration................... 10 G’sWeight............................. 2TC14 - 24 gm max.

3TC14 - 36 gm max.

Interrupt Current1-20 amps: 6000 amps at 28 VDC25 amps: 1625 amps at 28 VDC1-15 amps: 2500 amps at 120 VAC, 400 Hz20 amps: 2000 amps at 120 VAC, 400 Hz25 amps: 1800 amps at 120 VAC, 400 Hz

Endurance2500 cycles 120 VAC, 400 Hz Inductive5000 cycles 120 VAC, 400 Hz Resistive2500 cycles 30 VDC Inductive5000 cycles 30 VDC Resistive10,000 cycles Mechanical, no load

2TC14-12TC14-22TC14-21⁄22TC14-32TC14-42TC14-52TC14-71⁄22TC14-102TC14-152TC14-202TC14-25

1.100.700.500.400.450.350.300.280.250.250.20

3TC14-153TC14-203TC14-253TC14-303TC14-35

SensataNumber

VoltageDrop (max.)**

SensataNumber

VoltageDrop (max.)**

* Other vibration levels available. Contact factory for details.

**Max. voltage drop at nominal rated current.

0.250.250.250.250.25

Characteristics

2TC14 3TC14

.750

.078

.375 OFMOUNTING KEY

5 AMPRATINGSHOWN

CL

.031

.562MAX.

.047

.704

1.030MAX. 1.218

15/32-32UNS-2A .250

Panel Mounting.125±.005 Dia.

.375±.005

.485±.005 Dia.

#8-32 UNC

Calibration: 1-25 amps Calibration: 15-35 amps


.375±.005

.485±.005 Dia.

.047

.704

1.030MAX. 1.218

15/32-32UNS-2A

.250

#8-32 UNC

CL

.078

.031

1.100MAX.

.781MAX.

Approximate Time-Current Curves - 2TC and 3TC Circuit Breakers1000

100

% R

ated

Cur

rent

0.01 0.1 1 10 100 1000Trip Time in Seconds

165%138%115%85%

-54oC MAXIMUM TRIP CURVE

+25oC TRIP BAND

+121oC MINIMUM TRIP CURVE

5 35

.375 OFMOUNTING KEY

2TC14 / 3TC14

35 AMPRATINGSHOWN

Three Phase TC Series Circuit Breakers Miniature Ambient Compensated

Features

• One phase trips all

• Protective shields between each phase’s terminals

• Pads increase mounting stability

• Also includes identical featuresas 2TC and 3TC

Overview

The 6TC and 9TC circuit breakersprovide ambient compensatedcircuit protection in a lightweight,subminiature package size. Thethree phase design integrateseach individual phase to provide overcurrent protection in theevent of simultaneous orunbalanced overloads, includingshort circuit conditions.

Coordination

The 6TC and 9TC are compatiblewith their single phase 2TC and3TC cousins. The 6TC and 9TCare available in ratings from 1-35amps, with military and variouscommercial approvals on moststyles.


The 6TC and 9TC are ambientcompensated circuit breakers. Thisallows usage of smaller gauge wire.

The 6TC and 9TC can operate over a temperature range of-54oC to 121oC, however, careshould be taken to understand thespeci�cation limits at elevatedambient temperatures.

Options*


• High vibration

• Metric mounting thread

• Metric terminal thread

• Dust boot†

• Auxiliary switch device available††

* Contact factory for details† Part Number 14500-1 fits 15/32 bushing

Part Number 14500-5 fits 7/16 bushing†† 6TC Device

Trip Free

The complete line of TC seriescircuit breakers is trip free. The circuit breaker cannot be main-tained closed during an overload,even with the actuator buttonheld closed.


For its miniature size, the 6/9TCseries o�ers unusually highcurrent interrupting capacity.Overloads up to 2000 amps at120 VAC, 400 Hz can be safelyinterrupted without a�ectingcalibration or operatingperformance in the standard6/9TC series.

Qualifications

MS14154 6TC2

MS14154L 6TC37

MS14154V 6TC63

MS14153 9TC2

European standardsSAE standardsAll U.S. aircraft OEM’sMost European aircraft OEM’s

6TC9TC

TEMPoC

+25-54+90

+121

MIN ULTTRIP

110%110%100%

90%

MAX ULTTRIP

145%165%145%145%

TRIP TIME - SECONDS

200%4-206-403-203-20

500%.40-2.0.55-3.5.33-1.7.33-1.7

1000%.10-.53.15-.80.08-.40.08-40

Characteristics

spma 53-51 ,1 :noitarbilaCspma 02-2 :noitarbilaC

5

9TC146TC14 Panel Mounting Panel Mounting.125±.005 Dia. .125±.005 Dia.

.375±.005.485

±.005 Dia..485

±.005 Dia..375±.005

#8-32 UNC

.250 .250

.047

#8-32 UNC

1.840

.624

1.030MAX 1.218

.500

.765

1.100MAX.

.802

2.415

1.100MAX.

15/32 .32UNS 2A 15/32 .32

UNS 2A

1.350

.047

.765

1.030MAX. 1.218

TEMPoC

+25-54+90

+121

MIN ULTTRIP

110%110%100%

90%

MAX ULTTRIP

145%165%145%145%

TRIP TIME - SECONDS

200%4-206-403-203-20

500%.40-2.0.55-3.5.33-1.7.33-1.7

1000%.10-.53.15-.80.08-.40.08-40

† Single phase max. ult. trip values apply with other two phases carrying 100% ofrated current.


Vibration* ................................Mechanical Shock ...................Acceleration ............................Weight .....................................

10 G’s minimum, 50-500 Hz50 G’s10 G’s6TC14 - 65 gm max.9TC14 - 110 gm max.

Interrupt Current

Endurance

SensataNumber6TC14-26TC14-21⁄26TC14-36TC14-46TC14-56TC14-71⁄26TC14-106TC14-156TC14-20

Voltage Drop(max.)**

1.100.250.250.250.250.25

SensataNumber9TC14-19TC14-159TC14-209TC14-259TC14-309TC14-35

Voltage Drop(max.)

0.700.500.400.370.35.192.176.176.176

2-20 amps: 2000 amps at 120 VAC, 400 Hz1, 15-35 amps: 2000 amps at 120 VAC, 400 Hz

2500 cycles ................................... 120 VAC, 400 Hz Inductive5000 cycles ................................... 120 VAC, 400 Hz Resistive5000 cycles ................................... Mechanical, no load


** Max voltage drop at nominal rated current.(25 amp 6TC pending qualification.)

Approximate Time-Current Curves - 6TC and 9TC Circuit Breakers


+25oC TRIP BAND


1000

100.01 0.1 1.0 10 100 1000

Trip Time in Seconds

% R

ated

Cur

rent

165%145%110%100%

35

6/9TC

5 AMP RATING SHOWN35 AMP RATING SHOWN

2TC49 Series“Dual Safety™” Circuit Breakers

Features

Overview

• Extension of 2TC series

• Redundant protection in hard fault catastrophic conditions

• Separable link feature

• Case color distinguishes 2TC49 from 2TC series

• Uses less space and weighs less than other circuit breaker packages

• Rating 21⁄2 -15 amps

The 2TC49 “Dual Safety™” circuitbreaker represents a re�nementin electrical control and circuitprotection. The 2TC dual safetycircuit breaker incorporates afusible element in a standard 2TC(MS 3320) package size toprovide redundant protection inhard fault conditions.

“Hard Fault” Tripping

The 2TC dual safety circuitbreaker operates identically to astandard circuit breaker under allnormal conditions, including

short circuit. In the event ofcircumstances which disable theinternal circuit breakermechanisms, such that the deviceis able to carry current but unableto clear an overload via its normalmeans, the dual safety elementacts as a built in fuse to provideredundant circuit protection.

The key part in the dual safetydesign is a two part currentcarrying element joined by aspecial alloy. The geometry andmaterial of the element determineits heating properties. The

elements heating properties areslower than the bimetal sensorbut faster than the smoke curveof the wire the rating is designedto protect. In the case where thestandard mechanism is disabledor cannot operate normally, theseparable element “fuses” open,interrupting the current.

The bene�ts of the dual safetydesign result in calibratedovercurrent protection (basedon fuse times) and speci�ed postfuse dielectric properties forsystem and human protection.

2TC49“Dual Safety” Circuit Breaker

Approximate Time-Current Curves - 2TC49 Circuit Breakers1000

100

% R

ated

Cur

rent



+25oC TRIP BAND


Vibration* ..................................Mechanical Shock .....................Acceleration ..............................Weight .......................................

Interrupt Current

Endurance

21⁄2 - 15 amps: 6000 amps at 28 VDC21⁄2 amps: 2800 amps at 120 VAC, 400 Hz3 - 15 amps: 2500 amps at 120 VAC, 400 Hz

2500 cycles ................................ 120 VAC, 400 Hz Inductive5000 cycles ................................ 120 VAC, 400 Hz Resistive2500 cycles ................................ 30 VDC, Inductive5000 cycles ................................ 30 VDC, Resistive10,000 cycles ............................. Mechanical, no load


10 G’s minimum, 50-500 Hz50 G’s10 G’s2TC49 - 25 gm max.

Voltage Drop(max.)**

0.700.550.350.300.28

SensataNumber2TC49-21⁄22TC49-32TC49-5

2TC49-71⁄22TC49-10

** Max. voltage drop at nominalrated current

Link Separation CharacteristicsMaximum circuit breaker link separation times for locked contactcondition as a function of overload

21⁄23571⁄210

400%–––

69.060.0

500%––

95.028.035.0

600%34.034.036.014.020.0

700%20.020.018.08.0

12.0

800%13.013.010.04.07.0

900%9.09.06.03.54.0

1000%6.06.03.52.02.5

Am

p Ra

ting

% Overload Rated Current

Time (seconds)

Post-short circuit dielectric ......................................1125 VAC Min (1mA)Post-link separation dielectric .......................................... 900 VAC (1mA)

TempoC+25-54

+121

Min ULTTrip

115%115%

90%

Max ULTTrip

138%165%138%

200%5-207-403-13

500%.5-2.0.6-3.0

.33-1.1

1000%.12-.53.16-.8.07-.3

Trip Time – Seconds

Calibration: 21⁄2–15 amps

2TC49

Characteristics

.562

.083

.073

.036

.026

CASE COLOR BLUE

5 AMP RATINGSHOWN.781

.719

CENTER LINE OF MOUNTING KEY .370-.380


.445±.005 Dia.

.375±.005

.400 DIA.

.390BREAKER IN CLOSEDPOSITION

7/16-32NS-2A THREAD

BREAKER IN OPEN POSITION

BLACK

.250

.750 MAX.

#8-32 UNC

.250

.055

.040

1.3121.218

1.030 MAX.

47o–43o

.281

.219.531.469

“Dual Safety™” 2TC49

5 AMPRATING SHOWN

5

165%138%115%

90%

5TC Series Single Phase, Ambient Compensated

Features

• Trip free

• Current ratings (20 - 50amps)

• Coordinated ratings


• High interrupting capacity

Overview

Klixon® single-phase TC devicesrepresent “state-of-the-art” protection for today’s aerospacepower systems.

Coordination

The single phase 5TC rating iscoordinated so it will trip beforeanother circuit breaker, twice itsrating, in the event of a fault of

The Klixon trademark has set thestandard for aerospace circuitbreakers. The TC series o�ers theendurance and reliability requiredby exacting military speci�cationsand is available in standard currentratings from 20 – 50 amperes.

Ambient Temperature Compensation

The 5TC serves as an ambientcompensated circuit breaker. Itpermits system designers tospecify smaller gauge wire wherethe circuit breaker and wiring areexposed to di�erent ambienttemperatures. They are especiallysuited for application whereambient temperature exceeds the160oF (71oC) maximum of non-

ambient compensated thermalcircuit breakers. The 5TC seriesmay be applied where operatingtemperatures are as high as250oF (121oC), with no deratingof the circuit breaker. Thiseliminates the need for coolingair and allows substantial weight,space and cost savings.

Options

• Longer pushbuttons• Standard or auxiliary switch

con�guration• Terminal barriers

Qualifications

ASNE0732-005 ...................5TC65NSA931321 .........................5TC50

5TC505TC65

up to 600 amps let throughcurrent. This results in improvedoverall equipment performance,since only the smallest faultedcircuit is interrupted, while larg-er circuits remain operational.

Calibration: 20-50 Amps

Characteristics

Temp oC

+23-54+70

+125

Min. ULT.Trip

110%110%105%90%

Max. ULT. Trip

145%165%145%145%

200%

2-1870 sec. max.1.5 sec. min.1.5 sec. min.

500%

.15 - 2.5

.15 - 2.5

.15 - 2.5

.15 - 2.5

1000%

.045 - .6

.045 - .6

.045 - .6

.045 - .6

Trip Time - Seconds

The above calibration chart is representative of a standard commercial device. Sensata offers specific variants with similarperformance dependant on military or customer specifications. Temperatures are ±5oC.

Performance

Vibration .....................................Mechanical Shock ........................Acceleration .................................Weight

Standard Device .....................Auxiliary Device .....................

10 G’s minimum, 80-500 Hz50 G’s10 G’s

53 grams (w/o hw), 58 grams (w/hw)55 grams (w/o hw), 59 grams (w/hw)

Interrupting Capacity20-50 amps......4000 amps at 28 VDC20-50 amps..... 2000 amps at 115 VAC,400 Hz

Endurance2500 cycles...........115 VAC, 400 Hz,Inductive2500 cycles...........28 VDC, Inductive2500 cycles...........28 VDC, Resistive5000 cycles...........Mechanical, no load

Amp Rating20253550

Voltage Drop (max)*0.1500.1500.1500.120

.01 .1 1 10 100 1000Trip Time in Seconds

20

10

% R

ated

Cur

rent

5

Approximate Time-Current Curves - 5TC Circuit Breakers

2

1

+23oC TRIP BAND -54oC MAXIMUM TRIP CURVE


1.653 MAX.

1.29950 AMP RATINGSHOWN

.768 MAX. .622 MAX.

.378

1.9202.170 MAX.

.827

.059

1.102 MAX.1.575

.260

Panel Mountingø .492 ±.005 ø .138 ±.005

.375 ±.005

5TC

50

* Max. voltage drop at nominal rated current

Optional Aux. Switch

6752 Series Circuit Breakers Ambient Compensated Single & Three Phase High Short Circuit Capacity

Features

• Useable on large electrical systems – 6000 amperesinterrupting capacity

• Circuit protection una�ected by temperature�uctuation – ambient compensated from-65 oF to +250 oF

• Only faulted line circuits opened – coordination of ratings ensures that branch circuit breakers trip�rst under fault conditions

• Long trouble-free operation – 20,000 operating cycles

• Military approved

• High amp devices available (65A & 90A)

Overview

The Klixon 6752-12 and -300series thermal-magnetic circuitbreakers are ambient compensatedand trip-free. They are designedand manufactured to meet themore stringent military standardsof today’s jet aircraft, speci�callyMIL-DTL-22715.

The higher short circuit capacity, vibration resistance and longercycling life of the 6752-12 and-300 series exceed previousmilitary standards. In addition,the 6752-12 and -300 seriesprovide ambient compensation,fault coordination of all ratings,and an option for auxiliary circuits.

High Short Circuit CapacityA deionizing grid and magneticassist enable the 6752-12 and-300 series to successfullyinterrupt four fault currents of6000 amperes – two at sea leveland two at 60,000 feet – on either a120 VAC , 400 Hz system or a 30 VDCsystem.

Ambient TemperatureCompensationSubstantially una�ected byambient temperature, the 6752-12and -300 series circuit breakersmaintain their performance capa-bilities by means of a thermalcompensator in the temperaturerange of -54 oC to+121 oC.

Coordination

The 6752-12 and -300 seriesbreaker ratings are coordinatedso any rating will trip beforeanother rating, twice its capacity,in the event of a fault. Thisresults in improved over-allequipment performance, sinceonly the smallest faulted circuitis removed while larger circuitsremain in operation.

Auxiliary Circuit

The 6752-12 and -300 series areavailable with auxiliary switch.For part numbers and character-istics, please consult the factory.

Number

6752-12-21⁄2

6752-12-5

6752-12-71⁄2

6752-12-10

6752-12-15

6752-12-20

6752-12-25

6752-12-35

6752-12-50

MS Number

MS 24571-2

MS 24571-5

MS 24571-7

MS 24571-10

MS 24571-15

MS 24571-20

MS 24571-25

MS 24571-35

MS 24571-50

MS 24571-2V

MS 24571-5V

MS 24571-7V

MS 24571-10V

MS 24571-15V

MS 24571-20V

MS 24571-25V

MS 24571-35V

MS 24571-50V

MIL Qualification

When ordering MS 24571-XX(V) style breaker bySensata part number, designator must includeS.R. 12507-356Example: 6752-12-21⁄2 is S.R. 12507-356

6752-126752-300

Sensata

Single Phase

6752-12-21⁄26752-12-56752-12-71⁄26752-12-106752-12-156752-12-206752-12-256752-12-356752-12-50

Three Phase

6752-305-21⁄26752-305-56752-305-71⁄26752-305-106752-305-156752-305-206752-305-256752-305-356752-305-50

Voltage DropMax**

0.600.400.300.250.250.250.250.250.25

Sensata Number

** Max voltage drop at nominal rated current.

TEMPoC

+25-54+93

+121

MIN ULTTRIP

110%110%105%100%

MAX ULTTRIP

138%160%138%138%

TRIP TIME - SECONDS

200%12-6515-6512-6512-65

400%2.3-102.3-102.3-102.3-10

1000%.33-1.4.33-1.4.33-1.4.33-1.4


6752-12 Calibration: 21⁄2 - 50 amps

200%12-3214-3616-4018-4220-4520-4820-5020-5320-55

400%2.3-6.52.5-6.52.5-7.0

2.7-7.752.7-8.02.7-8.02.7-8.02.7-9.52.7-8.0

1000%.32-1.1.45-1.1.34-1.1.45-1.2.36-1.2.36-1.2.36-1.2.36-1.2.36-1.4

6752-12-21⁄26752-12-56752-12-71⁄26752-12-106752-12-156752-12-206752-12-256752-12-356752-12-50

6752-12

Characteristics

6752-305

2.200 MAX.1.810

.905

.750 MAX..375

.312 TERMINAL WIDTH

Ø.468

#6–32UNC SCREWS

Ø.418 .093

.250

2.18

.250

2.37MAX.

LINE TERMINAL1.19

.59445o

#8–32UNC–2A X .250 LONGPHILLIPS HEAD SCREW &

SPLIT LOCKWASHER.046 THICK (2 PLACES)

2.200 MAX.1.810

.905 #6–32UNC SCREWS

2.270MAX.

.750

1.500

.125.625 DIA.

.550

2.1802.370

2.470

45o .5941.190 #8–32UNC SCREWS

.804.250

10,000

1000

100

% R

ated

Cur

rent

160%100%

.01 .10 1 10 100 1000 10,000Trip Time in Seconds

Approximate Time-Current Curves 6752 Circuit Breakers

6752

5

5 AMP RATING SHOWN

6752-305 Calibration: 21⁄2 -50 amps

Vibration* .............................Mechanical Shock ................Acceleration .........................Weight ..................................

Interrupt Current

Endurance

21⁄2 - 50 amps: 6000 amps at 30 VDC (6752-12 only)21⁄2 - 50 amps: 6000 amps at 120 VAC, 400 Hz21⁄2 - 50 amps: 4200 amps at 205 VAC, 400 Hz

5000 cycles ................................ 120 VAC, 400 Hz Inductive5000 cycles ................................ 120 VAC, 400 Hz Resistive10,000 cycles ............................. Mechanical, no load20,000 cycles ............................. Total* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-2000 Hz25 G’s10 G’s6752-12 – 91 gm max.6752-305 – 292 gm max.

Performance Characteristics

Sensata Number

6752-100 Series Circuit Breakers Ambient Compensated Single & Three Phase High, Short Circuit Capacity

6752-100

Features

• Current ratings from 50-100 amps

• Proven reliability and performance of the 6752 seriescircuit breaker

• Usable on large electrical systems – 6000 amperesinterrupting capacity

• Circuit protection una�ected by temperature �uctuations– ambient compensated from -40oF to +160oF

• Military approved (including high sine vibration capability)to MS 25361 and MS 25361 (V)

Overview

The Klixon® 6752-100 seriesthermal-magnetic circuit breakersare ambient compensated andtrip-free. These circuit breakersare designed and manufactured tomeet stringent military standardswith the reliability of the original6752 design. The 6752-100 issimilar to the 6752-12 in size, andincludes current ratings rangingfrom 50-100 amps.

The higher short circuit capacity, vibration resistance and longercycling life of the 6752-12 and -300series exceed previous militarystandards. In addition, the6752-12 and -300 series provideambient compensation, faultcoordination of all ratings, and anoption for auxiliary circuits.


A deionizing grid and magneticassist enable the 6752-100 series tosuccessfully interrupt four fault6000 amp currents, two at sea leveland two at 60,000 feet, on either a120 VAC , 400 Hz system or a 30 VDCsystem.


The 6752-100 series circuitbreakers maintains itsperformance capabilities bymeans of a thermal compensatorin the temperature range of-40oC to +70 oC.

Sensata Number6752-100-506752-100-606752-100-706752-100-756752-100-806752-100-906752-100-100

MS NumberMS 25361-50MS 25361-60MS 25361-70MS 25361-75MS 25361-80MS 25361-90MS 25361-100

Sensata Number6752-102-506752-102-606752-102-706752-102-756752-102-806752-102-906752-102-100

MS NumberMS25361-50VMS25361-60VMS25361-70VMS25361-75VMS25361-80VMS25361-90VMS25361-100V

MIL Qualification

Characteristics

Envelope Dimensions

TempoC+25-40+70

Min ULTTrip

105%125%

70%

Max ULTTrip

138%165%125%

200%15-6515-6515-65

400%2-102-102-10

1000%1.41.41.4


6752-100 Calibration

10,000

1000

100

0.01 .01 1 10 100 1000Trip Time in Seconds

Approximate Time-Current Curves – 6752-100 Circuit Breakers

10

% R

ated

Cur

rent

UPPER LIMITAT –40oC

LOWER LIMITAT 70oC

165%138%105%70%

2.189 MAX.

1.083

.750 MAX.

6–32UNC–2BSELF-LOCKING NUT(2 REQ’D)(.312 MIN DEPTH)

.911

.9014X R .0901.8171.807

(CLOSED POSITION) .250 – 28UNF-2B INTEGRALALL-METAL LOCKING NUT(2 REQ’D)

MS35308-303.250 – 28UNF-2A X .500LCAP SCREW WITHFLAT WASHER(2 REQ’D)

DETAIL

.060 min.

.115

.035

.460MIN.

.427

.395

1.930MAX.

2.357

2.560MAX.

.735

1.470

47o43o

6752-100

#6-32 UNC SCREWS

Vibration* .....................................Mechanical Shock .....................Acceleration ................................Weight ...........................................

Interrupt Current

Endurance

120 VAC, 400 Hz: 3500 amps28 VDC: 6000 amps

5000 cycles .................................. 120 VAC, 400 Hz Resistive5000 cycles .................................. 120 VAC, 400 Hz Inductive5000 cycles .................................. 28 VDC, 400 Hz Resistive2500 cycles .................................. 28 VDC, 400 Hz Inductive5000 cycles .................................. no load


10 G’s minimum, 50-2000 Hz30 G’s10 G’s0.25 lbs (114 gm) max.

Performance Characteristics

3TC7 Series Single Phase, Non Ambient Compensated, High Short Circuit Interrupting Capacity

Features

Overview

• Lightweight

• Miniature size

• High interrupting capacity


• Available in 5-35 amperes

Detailed Performance Data

6000 Amperes at 30VC

120 VAC, 400 Hz Inductive120 VAC, 400 Hz Resistive30 VDC, Inductive30 VDC, ResistiveMechanical, no load10 G’s30 G’s peak10 G’s39 gm65,000 ft

3500 Amperes at120 VAC, 400 Hz2,500 Cycles5,000 Cycles2,500 Cycles5,000 Cycles5,000 Cycles

Interrupting Capacity

Endurance

VibrationMechanical ShockAccelerationWeightOperating Altitude

The Klixon 3TC7 style circuitbreaker is a lightweight, highperformance, non ambienttemperature compensated circuitbreaker that is well suited foraircraft, avionics and electricalsystems. The 3TC7 series featuresa trip free design that preventsthe circuit breaker from beingclosed manually on overloads.The 3TC7 interrupting a 6,000Acircuit at 30 VDC, or 3,500A circuitat 120 VAC, 400 Hz.

The Klixon trademark continues toset the standard for lightweightcon�gurations and o�ers theendurance and reliability requiredby exacting military speci�cations.The 3TC7 is currently available in5-35 amperes.

3TC7

MS Number

MS25244-5

MS25244-71⁄2

MS25244-10

MS25244-15

MS25244-20

MS25244-25

MS25244-30

MS25244-35

Amp Rating

5

71⁄2

10

15

20

25

30

35

Voltage Drop

.25

.25

.25

.25

.25

.25

.25

.25

Sensata Number

3TC7-5

3TC7-71⁄2

3TC7-10

3TC7-15

3TC7-20

3TC7-25

3TC7-30

3TC7-35

35

35 AMP RATING SHOWN

.750 MAX.


WHITE

BLACK

BLACK

1.094MAX.

.078

.240

1.74

.704

1.86MAX.

.120

BREAKER IN CLOSED POSITION

Characteristics

Calibration

+25oC-40oC+71oC

Max Ult Trip

138%178%114%

200%

15 - 55 sec--

600%

1.0 - 3.5 sec--

Min Ult Trip

115%148%70%

400%

2.0 - 7.0 sec--

0.1 1 10 100 1000Trip Time in Seconds

1000

100

% R

ated

Cur

rent

10

Approximate Time-Current Curve 3TC7 Circuit Breakers

3TC7

.375 OF MOUNTING KEY C

ø .330

115%138%

1.49

MS25082-C21

MS35338-136

MS51957-41

7274 Series Circuit Breakers Low Amperage, High Performance

7274-2

Overview

Features

• Uses minimum space

• Light weight

• Ratings: 1/2 – 20 amperes

• Military approved

The 7274 series are small, lightweight, low amperage devices thatare speci�cally designed toprotect aircraft / aerospace cablesuch as �at ribbon, fusedmulti-conductor tape and printedcircuit conductors now being usedin lighter weight powerdistribution systems and compo-nents in airborne vehicles andequipment.

The 7274 series features a trip-free indicating-type reset button.Also, a “wiping action” contactdesign assures low voltage drop,faster trip time and high reliabilityin low voltage applications. Theyare available in standard ratingsfrom 1/2 – 20 amps.

A water resistant panel seal* designed to �t over the pushbutton actuator is available forapplications that require this typeof protection.

Options

Long push buttonsAuxiliary switchWaterproof panel sealHigh vibration

* Part number 14500-1 fits 7274-11 and other typeswith 15/32” mounting bushing. 14500-5 fits 7274-2 (7/16”).

Sensata Number

7274-2-1⁄2

7274-2-3⁄4

7274-2-1

7274-2-11⁄2

7274-2-2

7274-2-21⁄2

7274-2-3

7274-2-4

7274-2-5

7274-2-71⁄2

7274-2-10

7274-2-15

7274-2-20

MS Number

MS 26574-1⁄2

MS 26574-3⁄4

MS 26574-1

MS 26574-11⁄2

MS 26574-2

MS 26574-21⁄2

MS 26574-3

MS 26574-4

MS 26574-5

MS 26574-71⁄2

MS 26574-10

N/A

N/A

Sensata Number

7274-11-1⁄2

7274-11-3⁄4

7274-11-1

7274-11-11⁄2

7274-11-2

7274-11-21⁄2

7274-11-3

7274-11-4

7274-11-5

7274-11-71⁄2

7274-11-10

7274-11-15

7274-11-20

MS Number

MS 22073-1⁄2

MS 22073-3⁄4

MS 22073-1

MS 22073-11⁄2

MS 22073-2

MS 22073-21⁄2

MS 22073-3

MS 22073-4

MS 22073-5

MS 22073-71⁄2

MS 22073-10

N/A

N/A

Sensata Number

7274-4-1⁄2

7274-4-3⁄4

7274-4-1

7274-4-11⁄2

7274-4-2

7274-4-21⁄2

7274-4-3

7274-4-4

7274-4-5

7274-4-71⁄2

7274-4-10

7274-4-15

7274-4-20

MS Number

MS 26574-1⁄2A

MS 26574-3⁄4A

MS 26574-1A

MS 26574-11⁄2A

MS 26574-2A

MS 26574-21⁄2A

MS 26574-3A

MS 26574-4A

MS 26574-5A

MS 26574-71⁄2A

MS 26574-10A

N/A

N/A

Sensata Number

7274-69-1⁄2

7274-69-3⁄4

7274-69-1

7274-69-11⁄2

7274-69-2

7274-69-21⁄2

7274-69-3

7274-69-4

7274-69-5

7274-69-71⁄2

7274-69-10

7274-69-15

7274-69-20

MS Number

MS 22073-1⁄2V

MS 22073-3⁄4V

MS 22073-1V

MS 22073-11⁄2V

MS 22073-2V

MS 22073-21⁄2V

MS 22073-3V

MS 22073-4V

MS 22073-5V

MS 22073-71⁄2V

MS 22073-10V

N/A

N/A

7274-70 Qualified to MS 26547L for ratings 1/2 amp to 10 amp.

7274-4 7274-11 and 7274-69

Characteristics

3 3

Vibration* .....................................Mechanical Shock ........................Acceleration .................................Weight ..........................................

Interrupt Current

Endurance

1/2 - 5 amps: unlimited at 28 VDC71⁄2 - 15 amps: 2000 amps at 28 VDC1/2 - 11⁄2 amps: 800 amps at 120 VAC, 400 Hz2 - 5 amps: 800 amps at 120 VAC, 400 Hz71⁄2 - 20 amps: 500 amps at 120 VAC, 400 Hz

2500 cycles ................................. 120 VAC, 400 Hz Inductive5000 cycles ................................. 120 VAC, 400 Hz Resistive2500 cycles ................................. 30 VDC, Inductive5000 cycles ................................. 30 VDC, Resistive5000 cycles ................................. Mechanical, no load


10 G’s minimum, 50-500 Hz35 G’s10 G’s minimum7274-2: 28 gm max.7274-4: 28 gm max.7274-11: 33 gm max.7274-69: 33 gm max.

TempoC+25-55+71

Min ULTTrip

115%135%

90%

Max ULTTrip

150%180%130%

200%2-20

––

500%.16-1.2

––

1000%.046-.8

––


Calibration: 1/2–20 amps

Sensata Number

7274-XX-1⁄27274-XX-3⁄47274-XX-17274-XX-11⁄27274-XX-27274-XX-21⁄27274-XX-37274-XX-47274-XX-57274-XX-71⁄27274-XX-107274-XX-157274-XX-20

Voltage Drop(Max.)**

2.001.451.100.750.750.700.550.450.350.300.280.250.25

**Max voltage drop at nominal rated current.

1000

100



10

% R

ated

Cur

rent 180%

150%115%90%

UPPER LIMIT AT -55oC

7274-2 and 7274-4 7274-11 and 7274-69

.750


.445±.005 Dia.

.375±.005


.485±.005 Dia.

.375±.005.562

.562

.445

.032

.419

.744

.388

.110

.078KEYWAY WASHER DETAIL

PUSH PULL BUTTON POSITION WITHCIRCUIT BREAKER TRIPPED (OFF)

7/16-32NS-2 THREAD

.440

.191.277 MAX.

.100

.213

.359

1.302

1.115

45o.593

#6–32 UNC SCREWS

MOUNTING NUT

LOCK WASHER

KEYWAY WASHER

BACK-UP NUT

LOCK WASHER

PHILLIPS RECESSPAN HEAD SCREW .050 DIA

HOLEAUXILIARY TERMINAL 7274-4 ONLY

15/32-32NS-2 THREAD

MOUNTING NUT

LOCK WASHER

KEYWAY WASHER

LOCK WASHER

PHILLIPS RECESSPAN HEAD SCREW

.750

.562

.032

.078KEYWAY WASHER DETAIL

45o

.203

.718

.472

.390

.093

.410DIA..100

.255

.250

1.707

1.450

.480

.191

.703#8–32 UNC SCREWS

PUSH PULL BUTTON POSITION WITHCIRCUIT BREAKER TRIPPED (OFF)

7274

3 AMP RATING SHOWN3 AMP RATING SHOWN

LOWER LIMIT AT 71oC

7277 Series Circuit Breakers Low Amperage, General Application

Overview

Features

The 7277 series is designed for applications that do notrequire the tighter performance characteristics andapprovals of our military circuit breakers.

• Small size

• Light weight

• Inexpensive

• Auxiliary switch


The 7277 series circuit breaker isphysically and electrically identicalto the 7274-2 style circuit breaker,with the exception that the 7277series has wider calibration limits.

Originally developed as an alterna-tive to slow blow fuses, the tripfree 7277 is used extensively asprimary electrical circuit protec-tion on general aviation aircraft.

TempoC+25

Min ULTTrip

110%

Max ULTTrip

150%200%2-35

500%.15-1.70

1000%.028-.55


Calibration: 1/2–20 amps*

* Performance characteristics and dimensions are equivalent to 7274 which arefound on page 19.

SensataNumber

7277-2-1⁄27277-2-3⁄47277-2-17277-2-11⁄27277-2-27277-2-21⁄27277-2-37277-2-47277-2-57277-2-71⁄27277-2-107277-2-157277-2-20


1000

100

.01 .1 1 10 100 1000Trip Time in Seconds


% R

ated

Cur

rent

150%115%

AmpereRating

1/23/4111⁄2221⁄234571⁄2101520

Max. Drop**(volts)

2.001.451.100.750.700.500.330.300.250.200.150.150.15

Ordering Information

Code System

7277 – 2 – 5

Basic type

Derivative

Ampere rating(i.e., 5 = 5 amps,71⁄2 = 71⁄2 amps)

7277 –1: Aux. switch version

The wider calibration limits of the7277 has also resulted inapplications including protectionfor data processing andtelecommunications equipment,computers, �ight simulators,construction, material handlingand other industrial,electronicequipment.

For use on trainer / simulator applications where all breakersare operated on low amperecontrol current, di�erent ampererating inserts (amp ratings on topof push button) can be ordered.Use TI part number 27515.

(Refer to 7274-2 and 7274-4dimensions on previous page.)

7277-2

7277-1

20TC Series Circuit Breakers Rocker Actuated Switch Type

Overview

Features

• Versatile rocker actuator – snap-on, switch type in various styles andcolors for panel mounting

• Provides dual function – “ON/OFF”circuit switching and protection

home appliances, o�ce reproduc-ing and calculating machines, anddata processing equipment.

Several di�erent types ofactuators are available. Thetranslucent actuator permits quickidenti�cation of the actuatorposition under low ambientlighting conditions by emitting asoft glow from a light source, suchas an edge lighted panel. Colored

The Klixon 20TC series circuitbreaker o�ers the advantages ofintegrating an on/o� switch and acircuit protector in a trim,compact package. The snap-onactuators are available on requestin a variety of colors, styles andindication markings. They aredesigned to provide a stylishconsole appearance to the panelsof light aircraft, pleasure boats,

actuators will be hot letterstamped in white. White andtranslucent actuators will bestamped in black.

The growing demand for a highly stylized and aesthetic panelappearance has generated theneed for the 20TC. The basicmechanism has been proven forreliability in a wide variety ofapplications.

Envelope Drawings

.655 MIN PANEL

OPENING

#6-32 NC-2 B (2 PLACES).750 MAX.

.375

1.620

1.375 MAX.

.250 OPERATING DISTANCE

1.200 MIN.PANEL OPENING

.420

1.173

1.642

#8-32 UNC-2A RD HEAD SCREWAND SPLIT L’ WASHER

Rocker Button Options(SR12507-156-X)

-1 -2-3-4-5-6-7-8-9-10-11-13-16-18-19-20-21-22-23-25-26-27-28-29-30-33-34-35

PUSH ON / LNDG LITEPUSH ON / NAV LITEPUSH ON / ANTI COLLPUSH ON / PITOT HEATPUSH ON / BOOST PUMPPUSH ON / GLIDE SLOPEPUSH ON MKR BCNPUSH ON / STROBE LITEOFFOFF“SR TO INVERT MARKING”PUSH ON / ROT BCNPUSH ON / ELEV TRIMPUSH ON / RADIO MASTERPUSH ON / LDG LITEON / OFFOFF“COLORED BOX”OFFON /OFFOFF / ONPUSH ON / LOW BOOSTPUSH ON / HIGH BOOSTPUSH ON / WX RADARPUSH ON / PROP DE ICEPUSH ON / STBY VACNO ACTUATORON / OFF

Code System

20TC2 – A A – 5

Basic typeSee dimensionaldrawing

Actuator StyleA = Serrated

Actuator ColorA = White

(Serrated& Smooth)

Ampere Rating

3 =5 =

71⁄2 =10 =15 =20 =25 =30 =35 =

3 amps5 amps71⁄2 amps10 amps15 amps20 amps25 amps30 amps35 amps

20TC2

Note: Performance Characteristics similar to 7270/7271 devices on page 22 and 23.

7270 & 7271 Series Circuit Breakers Miniature Aircraft

Features

• Trip free

• Snap-acting thermal element

• Simplicity of design

• High rupture capacity – 3500 amps,120 VAC, 400 Hz, 4000 amps, 30VDC

• Light weight

• Small size

Overview

The Klixon 7270/7271 seriescircuit breakers were designed toutilize less space behind the panelspace while protecting wire andcable in aircraft and groundsupport equipment on either120 VAC, 400 Hz or 30 VDCsystems. The units are availablewith neck mounting (7270-1 and7271-8) or standard cover plate(7270-7 and 7271-3). In each ofthese Klixon circuit breakers, thebi-metallic element assuresuniform current distributionthroughout its responsive area.This design reduces current den-sity at the critical areas, resultingin an element having a muchhigher interrupting capability thanconventional design. Inherentlyresistant to shock and vibration,the Klixon disc element is capableof precise calibration settings andwill retain the initial calibrationwithin close tolerances through-out the service life of the breaker.Both circuit breakers haveconventional actuator action; i.e.,the toggle actuator on the 7270moves to the OFF position for tripindication and the button of the7271 pops out. A standard blackbutton with a white collar is used.

Optional Covers

Sensata Number

7270-1-37270-1-57270-1-71⁄27270-1-107270-1-157270-1-207270-1-257270-1-307270-1-357270-7-37270-7-57270-7-71⁄2

MS Number

N/AMS 24509-A-5MS 24509-A-71⁄2MS 24509-A-10MS 24509-A-15N/AN/AN/AN/AN/AMS 24509-B-5MS 24509-B-71⁄2

SensataNumber

7270-7-107270-7-157270-7-207270-7-257270-7-307270-7-357271-3-37271-3-57271-3-71⁄27271-3-107271-3-157271-3-20

MS Number

MS 24509-B-10MS 24509-B-15N/AN/AN/AN/AN/AMS 24510-B-5MS 24510-B-71⁄2MS 24510-B-10MS 24510-B-15N/A

SensataNumber

7271-3-257271-3-307271-3-357271-8-37271-8-57271-8-71⁄27271-8-107271-8-157271-8-207271-8-257271-8-307271-8-35

MS Number

N/AN/AN/AN/AMS 24510-A-5MS 24510-A-71⁄2MS 24510 A-10MS 24510-A-15N/AN/AN/AN/A

Qualifications

#6-32 NC-2ASELF-LOCKING NUT

.313 .484

.188 .750 MAX.

2.188

7271-3

7270-7

#6-32 NC-2ASELF-LOCKING NUT

.313 .484

.188 .750 MAX.

2.188

7270-7

7271-8

7271-3

7270-1

5

TempoC+25

-40+71

Min ULTTrip

115%

138%80%

Max ULTTrip

145%

175%125%

200%40-12040-10010-70

––

400%3-263-22

.75-7.0––

600%1-121-10

.25-2.5––


Vibration* .....................................Mechanical Shock .....................Acceleration ................................Weight ..........................................

Interrupt Current

Endurance

4000 amps, 30 VDC3500 amps, 120 VAC, 400 Hz

200 cycles ................................... 30 VDC Inductive5000 cycles ................................. 120 VAC, 400 Hz Inductive5000 cycles ................................. 120 VAC, 400 Hz Resistive5000 cycles ................................. 30 VAC, 400 Hz Resistive10,000 cycles .............................. Mechanical, no load* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-500 Hz30 G’s10 G’s7270-1 – 39 gm max.7271-8 – 39 gm max.

1000

100


Approximate Time-Current Curves 7270 and 7271 Circuit Breakers

% R

ated

Cur

rent 175%

145%115%80%

10

Characteristics

7270-1

UPPER LIMIT AT -40oC

LOWER LIMIT AT 71oC

SensataNumber

7270’s 7270-x-37270-x-57270-x-71⁄27270-x-107270-x-157270-x-207270-x-257270-x-307270-x-35

Voltage Drop(Max.)**

0.750.650.50.50.50.50.50.50.5


SensataNumber

7271’s7270-x-37270-x-57270-x-71⁄27270-x-107270-x-157270-x-207270-x-257270-x-307270-x-35

Calibration: 3-35 amps

Rating

3 amps5 amps71/2-35

––

7271-8

55o ±7o.609

BREAKER IN“ON” POSITION

BREAKER IN “OFF”(OR TRIPPED) POSITION

WASHER .250

.844

1.313

.375

.375

45o

.906

THE CONFIGURATION AND SIZE OF ALL7270/7271 SERIES CIRCUIT BREAKERS, FROMTHE TOP PLATE DOWN, ARE THE SAME..750

1.375

.375.093DIA.

AMP RATING

MOUNTING NUT

WASHER KEYWAY

15/32-32NS-2A THREAD

.094

.188

#8-32 UNCSCREWS

DIMENSIONS IN INCHES

1.375

.750 MAX.

.375

BREAKER IN “OFF”(OR TRIPPED) POSITION BREAKER IN

“ON” POSITION

.718 .593

.468-32NS-2A THREAD

.100 DIA.

45

#8-32 UNC SCREWS.531

.806

.8431.218

1.313

7270/7271

5

5 AMP RATING SHOWN

3SB Series Simulator Circuit Breakers

Features

• Low amperage / fast trip response

• High performance

• Packaged in Military Standard con�guration

• Tactile feel equivalent to industryaccepted aircraft circuit breakers

• Lower total system cost

Overview

The 3SB Series Simulator CircuitBreaker has been developed bythe Precision Products Group ofSensata Technologies to meet thegrowing needs of the commercialand military simulator industry.With more and more training nowbeing conducted on simulatorsdue to the high operational costsof live training, the realism andcomplexity of tomorrow’ssimulators will require a circuitbreaker that can provide the same“look and feel” of industryaccepted circuit breakers,creating a superior trainingenvironment.

3SB electromechanical devices provide fast trip response withlow current draw at 28 VDC, andare packaged in a standard

MS26574 style thermal circuitbreaker con�guration foradaptability to aircraft cockpitpanel mounting. This fasttrip/low current performanceprovides the opportunity forsystem level savings by enablingthe designer to potentially downsize the system power source.This eliminates expensive I/Oboards or other electronics whilealso reducing the amount ofcabling required.

Changes in training schemesnormally entail system rewiringto recon�gure the simulator,which becomes labor intensiveand costly. With theincorporation of the 3SB device,training changes can easily beachieved through system

software, without the time andcost associated with rewiring.Sensata’s simulator circuit breakersalso provide the same tactile feelas standard MIL quali�edbreakers to achieve superiortraining realism.

Klixon circuit breakers o�er the �exibility of ordering replaceableampere rating inserts. They areattached to the top of the pushbutton actuator, to match thecurrent rating used in the actualaircraft. These inserts can berotated within the push button tomeet your cockpit con�gurationneeds. An optional auxiliaryswitch for remote indications,along with a variety ofconnection alternatives, are alsoavailable.

3SB4

3SB2

3

TEX

AS

INST

RUM

ENTS

MA

DE

IN U

.S.A

.

3

TEX

AS

I NST

RUM

ENTS

MA

DE

IN U

.S.A

.

Characteristics

3SB2 3SB4

.750

.562

3 AMP RATINGSHOWN BREAKER IN

CLOSED POSITION


.395

.216

.100

.359

1.302

1.115

45o .296.593

ACCEPTSMS 51957-25SCREW ORSOLDER CONNECTION

BLACK

BLACK

WHITE.191

.451

.277 MAX.

1.420MAX.

Open and Reset Force ...

Calibration @ 25oC .........

Endurance ..........................

Vibration..............................

Shock ...................................

Acceleration ......................

Weight .................................

5 lbs. max.

200 mA max. current draw @28 VDC, 3 sec. max trip time

5000 mechanical cycles, no load1000 electrical trip cycles, minimumat 28 VDC

5 G’s maximum 50-500 Hz

5 G’s maximum

5 G’s maximum

30 grams maximum

Dummy Circuit Breakers

Sensata Technologies has developed a derivative of our7274 style circuit breaker expressly for applications insimulators, trainers and cockpit mock-ups.

7274-63D: Dummy breaker. Non-functional 7274-2 style

7274-64PS: Physical sample. 7274-2 style with opera-tional push button. Can measure continuity acrossterminals.

7274-65PS: Physical sample. 7274-11 style with opera-tional push button. Can measure continuity acrossterminals.

Part Numbering Code

3SB 2 - 1 - X

Basic Device Series CalibrationRequirements

Physical Characteristics2 = Standard device4 = Auxiliary switch21 = Standard device w/cover22 = Standard device w/green push button24 = Auxiliary switch w/green push button41 = Auxiliary switch w/cover

Ampere Rating InsertsN = No InsertB = Blank InsertD = “D” Rating InsertAMP = Amp Rating (i.e., “5”)

.750

.562

3 AMP RATINGSHOWN BREAKER IN

CLOSED POSITION


.216

.100

.359

1.302

1.115

45o .296.593

ACCEPTSMS 51957-25SCREW ORSOLDERCONNECTION

BLACK

BLACK

WHITE.191

.451

.277 MAX.

1.420MAX.

AUXILIARY TERMINALOR SOLDER CONNECTION

Ø .050 HOLE(2 PLACES)

3SB

.395

APD Series Circuit BreakersArc Fault Protection Device

Features

• Small and lightweight

• Current ratings 1-25 amperes

• Detects arcs over considerable distances

• Senses small arc currents in presence of large current loads

• Insensitive to RFI/EMI and cross talk signals

• Di�erentiates between normal load current and arc current

• Immune to load start up transients

• Retro�table – �ts into existing panel designs

Overview

The Arc Fault Circuit Breakerseries has been developed bySensata Technologies to meet theevolving needs of the aerospaceindustry. Traditional circuitbreakers were only designed todetect over-current (I2t)conditions. However, manyserious electrical incidents arecaused by low level arc faultconditions resulting fromdamaged or aging wire whichpresent generation circuitbreakers are not designed todetect or protect against.

Sensata recognizes the evolving requirements of the aerospaceindustry and the need forsupplemental arc fault protection.Sensata developed a small, lightweight package con�gurationbased around proven Klixon®commercial and mil-spec circuitbreaker designs, integrating thetraditional over-current trip fea-tures of today’s circuit breakerswith new supplemental arc faultdetection and protection features.shut down for motor, fan, strobelight, or �uorescent light.

The two arc fault catalog pagesrepresent the �rst generation of

arc fault circuit breakers that willbe used in the commercialaerospace market. The �rstgeneration design is based uponthe industry need to support120VAC, 400 Hz aircraftapplications.

Future design considerations forthe arc fault circuit breakersunder development by Sensatacomprehend and include:

• Arc fault trip indication• 28VDC• Operating temperature range

expansion• Single phase 30–100A• Three–phase development• Ground fault detection• Variable voltage and

frequency options


The arc fault series of circuitbreakers are based on the designof our existing ambient compen-sated circuit breakers productfamily permitting systemdesigners to specify smallergauge wire where the circuitbreaker and wiring are exposedto di�erent ambienttemperatures. The arc fault

circuit breakers can operate overa temperature range of-54oC to 71oC however, careshould be taken to understandthe speci�cation limits at ele-vated ambient temperatures.

Trip Free

The complete line of arc faultseries circuit breakers is tripfree. The circuit breaker cannotbe maintained closed during anoverload, even when the actuatoris held closed.


The arc fault series of circuitbreakers o�ers unusually highshort circuit current interruptingcapacity. Depending on thedevice, overloads of up to3500 amps at 120VAC, 400 Hzcan be safely interrupted.

Options

Longer push buttonsHigh vibrationRandom vibration capabilityU.S. terminals (o�set/inline)Metric mounting threads

SENSATA TECHNOLOGIES

5

TEMPoC

+25-54

+121

MIN ULTTRIP

115%115%

85%

MAX ULTTRIP

138%165%145%

TRIP TIME - SECONDS

200%4-167-352-13

500%.4-1.6.6-3.0

.25-1.0

1000%.10-.40.15-.70.06-.25

Vibration*....................... 10 G’s minimum, 50 - 500 HzMechanical Shock.......... 50 G’sAcceleration................... 10 G’sWeight............................ 42 gm max

Interrupt Current1-20 amps: 6000 amps at 28 VDC25 amps: 1625 amps at 28 VDC1-15 amps: 2500 amps at 120 VAC, 400 Hz20 amps: 2000 amps at 120 VAC, 400 Hz25 amps: 1800 amps at 120 VAC, 400 Hz

Endurance2500 cycles 120 VAC, 400 Hz Inductive5000 cycles 120 VAC, 400 Hz Resistive2500 cycles 30 VDC Inductive5000 cycles 30 VDC Resistive10,000 cycles Mechanical, no load


Characteristics

Calibration: 1-25 amps

Approximate Time-Current Curves – APD Circuit Breakers1000

100

% R

ated

Cur

rent


165%138%115%85%


+25oC TRIP BAND


Arc Fault

1.200MAX 5 AMP RATING SHOWN

15/32ø .395

1.219 1.312

.704

NEUTRAL LEAD LENGTH& CONNECTION TBD

.2841.030 MAX

.800 MAX

Performance:Discrimination (resistance to nuisance trips)Devices manufactured by Sensata have demonstrated successon start up, bus transfer, and shut down for motor, fan,strobe light, and �uorescent light.

Detail performance per test document 76508Phase to Phase and Phase to Ground 400 Hz, 120/205VAC

Guillotine Arc Test:Guillotine Arc Current .......Less than 700% RC rms Steady State Load ..............None to rated currentMaximum Arcing Cycles ....EightArcing Time Duration .........Less than 100ms

Loose Terminal Arc DetectionSteady State Load ..............Less than 40% RC rmsTripping Time: ....................Less than 2 minutesVibration Source .................Eccentric motor vibratory table

Wet Arc DetectionMIL-STD-2223 Method 3005, wire per MIL-W-81381/11

Boeing Basic Specification

BACC18UBACC18WBACC18ZBACC18AABACC18ACBACC18ADBACC18AE10-60806-XX10-60806-XXXX

Boeing (DPD)

5D0001NoneNone

SensataStyle

7274-217276-132TC62TC146TC62TC479TC66752-3046752-311

7274-627274-557276-115

Airbus Basic Specification

NSA931303NSA931304NSA931320NSA931321NSA931322NSA931323NSA931324NSA931325E0730-005E0731-005E0732-005E0733-005

SensataStyle

6752-126752-3052TC505TC506TC5015TC502TC646TC642TC656TC655TC6515TC65

Commercial Aircraft Circuit Breaker Cross Reference

QPL approved Aircraft Circuit Breakers speci�cations have been or are in the process of being converted to SAEindustry standard. The speci�cation requirements and part marking remains as per the original military slashsheet. The only di�erence is the SAE industry designation for the military slash sheet.

Lockheed Basic Specification

LS10158

LS10159S

SensataStyle

2TC20, 3TC202TC26/3TC266TC20, 9TC206TC26/9TC26

For FAA/PMA part availability go to www.sensata.com

Cross Reference

European Norms

EN2495EN2592EN2794EN2995EN2996EN3661EN3662EN3773EN3774

AS Number

AS 33201AS 33201LAS 33201VAS 14105AS 14105LAS 14153AS 14154AS 14154L

Sensata Number

2TC22TC272TC633TC23TC279TC26TC26TC37

AS Number

AS 14154VAS 22073AS 22073VAS 26574AS 25244AS 25244(P)

Sensata Number

6TC637274-117274-697274-23TC73TC8

AS Number

AS 26574AAS 26574LAS 24509AAS 24509BAS 24510AAS 24510B

Sensata Number

7274-47274-707270-17270-77271-87271-3

Simplified Glossary of Circuit Breaker TermsCircuit breaker– A devicedesigned to carry a speci�c valueof current and automatically opena circuit upon overloads orshort circuits.

Thermal circuit breaker –A circuit breaker that senses a current overload based on thermalheating of the sensing element.

Time-current curve – An approx-imate graph showing the minimumand maximum time a speci�cbreaker will take to trip on variousdegrees of overload.

Ambient compensation –A feature of some thermal breakersthat limits or eliminates thermalderating due to ambienttemperature.

Minimum ultimate trip – Currentrating at which a breaker will nottrip within a certain period (usually1 hour) at a speci�ed temperature.

Maximum ultimate trip – Currentrating at which a breaker must tripwithin a certain period (usually 1hour) at a speci�ed temperature.Thermal derating – Tendency of abreaker to trip at lower currentlevels due to higher ambienttemperatures, and to trip at higherlevels due to lower ambienttemperatures.

Trip-free – Feature of certain breakers that makes it impossible tohold the breaker closed against anoverload.

Manual reset – Method ofaccomplishing reclosure aftercircuit interruption has occurred.

Indicating, non-indicating –Whether or not breaker givesprominent visual indication ofopening, such as exposing a whiteband around button, or movingtoggle to o� position.

Manual trip – Ability of breakerto be opened manually.

Auxiliary circuit – An integrallyhoused, electrically independentswitch linked mechanically tooperate with the main circuitbreaker contacts.

Voltage drop – The voltagedecrease across the breaker due tointernal resistance of the device.

WARRANTY

Sensata Technologies warrants its circuit breakersagainst faulty workmanship or the use ofdefective materials for a period of 18 monthsfrom date of manufacture. This warrantyapplies only to products purchased directlyfrom Sensata Technologies or through an author-ized Sensata Technologies distributor. During thewarranty period, any circuit breaker found bySensata Technologies, in its sole judgement, to bedefective, will be repaired or replaced, at theoption of Sensata Technologies. Under no circum-stances does Sensata Technologies responsibilityor liability extend to incidental or consequen-tial damages whatsoever.

The foregoing is in lieu of all warranties express, implied or statutory, including, but notlimited to, any implied warranty of merchant-ability and fitness for a purpose and of anyother warranty obligation on the part ofSensata Technologies.

Important Notice: Sensata Technologies (Sensata) reserves the right to make changes to or discontinue any product or service identified in this publication without notice. Sensata advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current. Sensata assumes no re-sponsibility for infringement of patents or rights of others based on Sensata applications assistance or product specifications since Sensata does not possess full access concerning the use or application of customers’ products. Sensata also assumes no responsibility for customers’ product designs.

www.sensata.com

New York

California Georgia

France

Holland

United Kingdom

Israel

ItalySingapore

Authorized U.S. Distributors of All Products

Name

Peerless Electronics

Flame Enterprises

TPS Aviation

Avio DiepenWesco Aircraft

Main Office

Lynbrook, NY

Canoga Park, CA

Hayward, CAAtlanta, GAWichita, KS

Phone

(800) 285-2121(516) 593-2121(800) 854-2255(818) 700-2905(510) 475-1010(770) 996-6430(800) 544-4070

Fax

(516) 593-2179

(818) 700-9168

(510) 475-8817(770) 996-8430

Web Site

www.peerlesselectronics.com

www.flamecorp.com

www.avio-diepen.comwww.airtechnics.com

Name

JB ControlsAvio DiepenCharcroft Electronics LtdOdem ElectronicsPatton AirPrecision Technologies

Main Office

Paris, FranceHollandEnglandIsraelItalySingapore

Phone

33 1 56 47 04 0431 172 449759+44 (0) 1591 610408972 3 966 034039 331 792 6586 65 27 34 573

Fax

33 1 56 47 04 0531 172 449789

972 3 966 034539 331 796 5526 65 27 38 898

Web Site

[email protected]@[email protected]@[email protected]

Other Distributors and Sales Agents

Authorized DistributorsKansas

circuit breaker

Documents

magnetic assist

longer cycling

speci cation

smaller gauge

ambient temperature

speci ed temperature

elevated ambient

magnetic circuit