Klixon 3SB Series
Aircraft Circuit Breakers
    ACB Catalog

Phone: 1-508-236-3287
Fax: 1-508-236-1598
more »
Part numbers
Don’t risk ordering the wrong part. Contact us or a distributor.

About these pages
Sensata Technologies is in the process of updating our web pages. Please bear with us during this process. If you have questions or comments, we’d like to hear from you. Please see contact us.

7274 Dummy /\ Top
We offer a derivative of our 7274 style circuit breaker for simulators, trainers, and cockpit mock–ups.
Part Number
Dummy breaker, non–functional 7274-2 style
Physical sample, 7274-2 style with operational pushbutton, can measure continuity across terminals
Physical sample, 7274-11 style with operational pushbutton, can measure continuity across terminals

Site Updated February 16, 2018

* * * Sensata > Products > Klixon Brand > Circuit Breakers > Aircraft >

Klixon® 3SB series
Simulators, single–phase, low amp, quick trip

Features and Overview Spec Sheet PDFs
Drawings and Dimensions 7274 Dummy
Performance Characteristics  
Ask a question » Contacts and distributors »

Features and Overview /\ Top

Low amperage
Fast trip response
High performance (shock and vibration)
Lower total system cost
Tactile feel equivalent to industry accepted aircraft circuit breakers
Packaged in military standard configuration
Optional panel mount configuration, replaceable amp rating inserts (reference part #27515 when ordering), auxiliary switch

Klixon 3SB series simulator circuit breaker was developed by Sensata Technologies to meet the growing needs of the commercial and military simulator industry. Due to the high operational coast of live training, more and more training is being conducted on simulators. The realism and complexity of tomorrow’s simulators will require a circuit breaker that can provide the same "look and feel" of industry accepted circuit breakers in order to create a superior training environment.
* * *

7274   7274

The 3SB electro mechanical devices provide fast trip response with low current draw at 28 VDC. For adaptability to aircraft cockpit panel mounting, they are packaged in a standard MS 26574 style thermal circuit breaker configuration. This fast trip/low current performance provides the opportunity for system level savings. It enables the designer to potentially downsize the system power source and eliminate expensive I/O boards or other electronics while also reducing the amount of cabling required.

Changes in training schemes normally entail system rewiring to reconfigure the simulator, which becomes labor intensive and costly. With the incorporation of a 3SB device the training changes can easily be achieved through system software — without the time and cost associated with rewiring.

Klixon simulator circuit breakers also provide the same tactile feel as standard Mil qualified breakers for superior training realism.

Klixon circuit breakers offer flexibility by offering replaceable ampere rating inserts. (To order different amp rating insert tabs, reference part number 27515.) Attached to the top of the pushbutton actuator, they match the current rating used in the actual aircraft. These inserts can be rotated within the pushbutton to meet your cockpit configuration needs.

An optional auxiliary switch for remote indications and a variety of connection alternatives are also available.

Performance Characteristics /\ Top
5 G maximum, 50–500 Hz
Mechanical Shock
30 grams maximum
25000 mechanical cycles, no load
1000 Electrical trip cycles minimum at 28 VDC
Open and Reset Force
5 lb. maximum
Calibration at 25°C
200mA maximum
Current draw at 28 VDC
3 seconds maximum trip time

Drawings and Dimensions For Reference Only /\ Top
3SB2 Diagram

3SB4 Diagram

Spec Sheets For Our Most Popular Devices /\ Top
Specification sheets contain detailed drawings, amp ratings, characteristics, and more...
Device Type
Spec Sheet
- - -
- - -
For others, please contact us.
The World Depends on Sensors and Controls