Series 18x Hi-amp circuit breaker
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Series 18x Hi-amp circuit breaker

The Series 18X Hi-Amp Circuit Breaker features a manual, auto and switchable reset and is single pole thermal type.


  • Applications: Typically used in auxiliary and accessory circuits in truck, bus’, RVs and marine systems. Others include battery chargers and DC audio systems. Series 181, 184 & 185 are sealed for engine compartment and bilge area applications. 
  • Rating: 25-150A, 30Vdc; 48Vdc (Series 184 & 185) 
  • Interrupt Rating: 3000A @ 30Vdc 
  • Operating Temperature Rating: –25°F (–32°C) to 180°F (82°C) 
  • Storage Temperature Rating: –40°F (–40°C) to 260°F (125°C) 
  • Materials: Black UL-rated 94V0 thermoset plastic. Thermoplastic elastomer stud insulators are provided on covered units with F-style (surface-mount) bases 
  • Marking: Standard marking includes amp ratings and part numbers. Custom markings also available. 
  • Termination: 1/4-28 threaded studs