Engineered for durability and performance, this 10A shortstop circuit breaker features an automatic reset, providing continued operation during over current conditions and will continue to recycle until the source of the over current is either, removed or corrected. Designed with a right angle mounting bracket for easy mounting, this shortstop circuit breaker is perfect for use with power outlets, portable generators as well as various commercial truck, bus, automotive and marine applications. 10-amp circuit breakers are also available with an In-Line Mounting Bracket or No Mounting Bracket. 


  • 10A automatic reset (Type I) automotive shortstop circuit breaker, designed for use in various commercial truck, automotive and marine applications
  • Features a heavy-duty metal housing case for superior protection against extreme elements
  • Typical applications include power windows, trailer packages, sunroofs, door locks, trolling motors, etc.
  • Features a right angle/ perpendicular bracket for quick and easy mounting
  • SAE Standard J553 & J1171 compliant
  • Also available in IP66 rated protective plastic housings
  • Circuit breakers also available in Non-Cycling (Type II) and Manual Reset (Type III)

Technical Specifications 

  • Manufacturer: Cooper Bussmann
  • Manufacturer Part Number: 121B10-A2M-KA
  • Amps: 10
  • Type: Shortstop
  • Reset Method: Type I (Automatic)
  • Mounting Style: Right Angle Bracket
  • Housing Material: Metal
  • Terminal Connection: 10-32 Studs
  • SAE Compliance: J553; J1171