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Home / Electrical / Circuit Breakers / Push-Pull / MS3320 / MS25244 /7277-2-5 Circuit Breaker
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7277-2-5 Circuit Breaker

31 Reviews 12 Answered Questions
$42.50/Each
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Part# 7277-2-5
MFR Model# 7277-2-5
DescriptionPN
7277-2-5 Circuit Breaker7277-2-5

Overview

The 7277 series circuit breaker is physically and electrically identical to the 7274-2 style circuit breaker, with the exception that the 7277 series has wider calibration limits.

Originally developed as an alternative to slow blow fuses, the trip free 7277 is used extensively as primary electrical circuit protection on general aviation aircraft. The wider calibration limits of the 7277 has also resulted in applications including protection for data processing and telecommunications equipment, computers, flight simulators, construction, material handling and other industrial,electronic equipment.

For use on trainer / simulator applications where all breakers are operated on low ampere control current, different ampere rating inserts (amp ratings on top of push button) can be ordered.

    • Small size
    • Light weight
    • Inexpensive
    • Auxiliary switch
    • Longer push buttons

Features

  • FEATURES: The 7277 series is designed for applications that do not require the tighter performance characteristics and approvals of our military circuit breakers.
    • Small size
    • Light Weight
    • Inexpensive Auxiliary switch 7277-1 Only
    • Longer Push Buttons 7277-5 Only
    Temp. C
    Min Ult Trip
    Max Ult Trip
    Trip Time - Seconds
    +25
    110%
    150%
    200%
    500%
    1000%
    2-35
    .15-1.75
    .028-.8

    *Performance characteristics and dimensions are equivalent to 7274 (Calibration: 1/2 - 20 amps*)

Documents

Dimensions

Reviews

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As described. Works fine

Alain M Verified Purchase

7277-2-5 Circuit Breaker
November 20, 2024

As advertise and described.

Taylor A Verified Purchase

7277-2-5 Circuit Breaker
June 19, 2024

As describe

Alain M Verified Purchase

7277-2-5 Circuit Breaker
February 15, 2024

Small reliable breaker that doubles as a power switch. Easy to see if it’s open or closed which makes this ideal for any circuit application.

Derek S Verified Purchase

7277-2-5 Circuit Breaker
December 14, 2023

A quality product

William J Verified Purchase

7277-2-5 Circuit Breaker
November 27, 2023

C/B is exactly what we needed to install a new piece of equipment. it matched the existing C/Bs perfectly, and simplified our installation. Plus, we received it the next day after we ordered it.

Von Z Verified Purchase

7277-2-5 Circuit Breaker
November 3, 2023

Dietmar K Verified Purchase

7277-2-5 Circuit Breaker
October 6, 2023

This was an exact replacement for Cessna 340A. Its important that the configuration of the terminals are correct.

Hal D Verified Purchase

7277-2-5 Circuit Breaker
March 9, 2023

Good product as ordered! Shipped and arrived as expected. Good price!

Julicher A Verified Purchase

7277-2-5 Circuit Breaker
March 4, 2023

Good product, use them!

Tango L Verified Purchase

7277-2-5 Circuit Breaker
February 2, 2023

Q&A

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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 Klixon 7277 series circuit brakers FAA PMA'd and TSO'd?

No, they are not FAA PMA'd or TSO'd.

Q: The 7277 series part numbers have the format 7277-X-Y The 'Y' is obviously the current capacity in Amps. What is is the 'X'?

The first number following 7277 is a type designator. -1 indicates auxilary (not for primary use) and the -5 has a longer push button than the standard -2.

Q: What is the hole size required for the Klixon 7277 circuit breakers?

Per the manufacturer the mounting hole should be 0.445 in diameter and the smaller hole should be 0.125

Q: What is the difference between the 7277-1-* and the 7277-2-* breaker?

The 7277-1 has an Aux. circuit option and the 7277-2 does not.

Q: Does Klixon offer a 1/2 amp breaker in the 7277 version? Any type designator.

Yes, Klixon offers a 1/2 amp breaker which would be a special order, please contact our avionics department to place the order.

Q: Screw type or spade type terminals?

These are screw type terminals.

Q: What size screw is used for the terminals on the 7277 Klixon breakers?

The terminals have 6-32 X 3/16" long screws.

Q: What are the mounting dimensions of the Klixon 7277-5 series circuit breakers?

We have added the drawing to the Dimensions tab of the web page for review.

Q: Are these circuit breakers (7277) approved for certified aircraft?

These circuit breakers do not have FAA Approval on their own. They were commonly installed as OEM breakers on many production aircraft, and thus might be approved under the airframe approval as replacement parts. Please confirm in your aircraft parts manual and with your A&P to ensure these can be legally installed in your aircraft.

Q: Can these be used as a switch?

We do not have any data to support using this circuit breakers as a switch.

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