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Klixon 7274-2-5 Circuit Breakers

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Part# 11-08358
MFR Model# 7274-2-5


Klixon 7274 series are small, lightweight, low amperage devices that are specifically designed to protect aircraft/aerospace cable and components in airborne vehicles and equipment.

The commercial grade version of this circuit breaker is the Klixon 7277 series. The 7277 and 7274-2 series circuit breakers are physically and electrically identical, with the exception that the 7277 has wider calibration limits.


The 7274 features a trip–free, indicating reset button and is available in standard ratings from ˝ to 20 amps.

Wiping Action
A "wiping action" contact design assures low voltage drop, faster trip time and high reliability in low voltage applications. They are available in standard ratings from ˝ to 20 amps.

Water Resistant Panel
A water resistant panel seal designed to fit over the push button actuator is available for applications that require this type of protection.


  • Uses minimum space
  • Light weight
  • Trip–free
  • MIL-C-5809 qualified
  • Current rating: 5 amp
  • Low amp
  • High vibration resistance
  • Typical use: Military airborne vehicle and equipment protection


  • Amp: 5
  • MS#: MS26574-5
  • Vibration: 10G minimum, 50–500 Hz (other vibration levels available)
  • Mechanical Shock: 35G
  • Acceleration: 10G
  • Weight: 7274-2 (MS 26574): 28 grams maximum; 7274-4 (MS 26574 A): 28 grams maximum; 7274-11 (MS 22073): 33 grams maximum; 7274-69 (MS 22073V): 33 grams; 7274-70 (MS 26474L): 33 grams
  • Interrupt Current: 0.50–5 amps: unlimited at 28 VDC; 7.50–15 amps: 2,000 amps at 28 VDC; 0.50–1.50 amps: unlimited at 120 VAC, 400 Hz; 2–5 amps: 800 amps at 120 VAC, 400 Hz; 7.50–20 amps: 500 amps at 120 VAC, 400 Hz
  • Endurance: 2,500 cycles: 120 VAC, 400 Hz inductive; 5,000 cycles: 120 VAC, 400 Hz resistive; 2,500 cycles: 30 VDC inductive; 5,000 cycles: 30 VDC resistive; 10,000 cycles: Mechanical, no load
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As published.

Federico F Verified Purchase


December 21, 2021

Perfect as advertised -

Seagull A Verified Purchase


November 11, 2021

Thierry H Verified Purchase


September 12, 2021

These are the best answer for no room in the electrical panel . Easy to use and install.

Nick M Verified Purchase


July 18, 2021

So far working well

John J Verified Purchase


June 22, 2021

good breaker for crowded panel

Ronald E Verified Purchase


June 20, 2021

Replacing old 1960s style breakers with these makes it a snap, and you can fit an extra one of these between the 2 old style if you need to add breakers. With Garmin calling out this MIL-Spec number in their installation manuals, theres no reason you cant use these anywhere else on certified aircraft with the proper logbook/337 signoff. Love the fact I can now pull power off individual pieces of equipment vs old style you could not! Highly recommend these style breakers!

Sherman C
November 7, 2020

Klixon makes very good CBs. This one is required for several components for Garmin G5 installations. It meets Garmins STCd installation requirements for G5 installations. It has the same form factor as the Klixon 7277-2-5 making the 7274-2-5 an easy replacement on the bus. The 7274 series has tighter tolerances for the current and time requirements of the MS certification. The breaker works as a good breaker should.

Willy Z
March 13, 2020

Certainly appears to be a quality product. Its not really something that an evaluation is necessary on. Or the other circuit breakers that I purchased.

Donald E
August 16, 2019

A bit more expensive, but is mil spec and compact - always a bonus when things use less space when working behind the panel.

Ray A
May 24, 2019


Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Are the 7274 circuit breakers PMA approved?

The 7274 series Klixon breakers meet MIL-MS26574 spec. They are not FAA PMA approved but the Mil spec allows them to be installed on certified aircraft. MIL-C-5809 qualified.

Q: What are the physical dimensions of this Klixon 7274-2-5 circuit breaker, LxWxH?

The dimensions are 3/4" L x 9/16" W x 2" H.

Q: What is the mounting hole size of the Klixon 7274-2-5 breaker?

The mounting hole should be approximately .445" to fit the 7/16-32 threaded neck to the panel.

Q: what is the screw size for the ring terminal?


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