Series 12x (Shortstop circuit breakers)
Serial Number Verified :
The product is verified as being authentic; however, this does not guarantee the condition or fit for purpose of the product.

Series 12x (Shortstop circuit breakers)

The Series 12X Shortstop Circuit Breakers feature an auto, manual and modified reset and is a single pole thermal type breaker.


  • Single Pole Thermal Type Breakers
  • Applications: Battery chargers, trucks, buses, RVs, trolling motors, etc
  • Rating :5-50A, 14Vdc; 28Vdc (Series 123, 124, & 125)
  • Interrupt Rating: Main Circuit Protection: 1.5kA @ 12Vdc (Series 193 w/plastic cover)
  • Branch Circuit Protection: 2.5kA @ 12Vdc (Series 121 & 124 -01 sealed & Series 123 w/plastic cover)
  • Operating Temperature Rating: –40°F (–40°C) to 185°F (85°C)
  • Storage Temperature Rating: –40°F (–40°C) to 260°F (125°C)
  • Materials: Black UL-Rated thermoplastic body (thermoset for Type II body & buttons). Cover is grey thermoplastic or steel-Type l gold, Type ll silver