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.
Trip–Free 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
Current rating: 3 amp
High vibration resistance
Typical use: Military airborne vehicle and equipment protection
Good quality breaker with a small footprint, solid connection. Have bought a number of these in various amperages. Been flying on my plane for about a year. No problems.
April 26, 2021
I have installed a lot of Klixon circuit breakers over the years. I have never had a breaker fail. The service on this breaker was fantastic. I can order in the morning & the item will arrive the next day on most items. If it is in the afternoon, then it takes an extra day.
May 30, 2020
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: Which contact is the line side, and which is the load side?