2TC2-5 Circuit Breaker

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Part# 11-08387
MFR Model# MS3320-5


Single–phase TC devices are the smallest, lightest high performance aircraft circuit breakers available today. They represent the state-of-the-art protection of today’s aerospace power systems. Their light weight and small size make them especially well suited for aircraft, avionics and electronic systems.

The 2TC series breaker ratings are coordinated so any rating will trip before another rating twice its capacity in the event of a fault. of up to 6,000 amps let–thru current. This results in improved overall equipment performance since only the smallest faulted circuit is interrupted, while larger circuits remain operational.

Ambient Temperature Compensation
Ambient compensated circuit breakers let designers specify smaller gauge wire where the circuit breaker and wiring are exposed to different ambient temperatures. They are especially suited for application where ambient temperature exceeds the 160°F (71°C) maximum of non–ambient compensated thermal circuit breakers. The TC series may be applied where operating temperatures are as high as 250°F (121°C) with no derating of the circuit breaker. This eliminates the need for cooling air and allows substantial weight, space, and cost savings.

The complete line of TC series circuit breakers is trip–free. The circuit breaker cannot be maintained closed during an overload even with the actuator button held closed.

High Short Circuit Capacity
For its miniature size, the 2TC series offers unusually high current interrupting capacity. Overloads can be safely interrupted without affecting calibration or operating performance in the standard 2TC series for: • Overloads up to 6,000 amps at 28 VDC • Overloads of 2,000–3,500 amps at 120 VAC, 400 Hz
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


  • Miniature size
  • Light weight
  • Trip–free design
  • Current ratings 5 amps
  • High vibration resistance
  • High interrupting capacity
  • Coordinated ratings
  • Meets Mil-Spec Standards
  • Typical end use: Aircraft power distribution systems Miniature size


  • Part No: 2TC2-5
  • Amp: 5
  • Vibration 10G minimum, 50–500 Hz (other vibration levels available)
  • Mechanical Shock 50G
  • Acceleration 10G
  • Weight 24 gram maximum (2TC14)
  • Frequently Purchased With
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Always a great product. Does as advertised.

Max S Verified Purchase


July 21, 2022

Standard CB, be careful when choosing due to terminal post angles.

Avionics C Verified Purchase


July 19, 2022

Make sure you know which way the contacts go.

Kevin B Verified Purchase


June 16, 2022

I like these CB - good performance specs. The terminal configuration may or may not be what your looking for.

Chris P Verified Purchase


June 10, 2022

Have used Klixon for years, Great breakers and ACS sells that at the right price.

September 16, 2019

Good and fast shipping Very enough Thank you very much

Lee S
April 28, 2019

Good breaker but not as user friendly as the 7277.

Chris P Verified Purchase


December 18, 2021


Please note, Aircraft Spruce'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 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: What is the small black plastic pin for, which you can see on the left side of the green housing of the product photo. Is it just a twist lock for the housing?

It is for anti rotation.

Q: Is the anti rotation pin on bottom or top of the Klixon 2TC2-5?

It is at the top.

Q: What is the size of the threads for the terminals on the breakers? I found with a 1/8 copper bus bar the supplied screws are too short

These use 8-32 threaded screws.

Q: Does the replacement of an OEM flush non-pullable with one of these Klixon CBs of the same designated rating require a Form 337 submission or just a simple logbook entry? (Hint: Say the second one)

Please speak to your installer or A&P to verify what is necessary in regard to paperwork.

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