These Blue Sea / Bussman Thermal circuit breakers provide medium duty circuit protection for loads when switching and circuit protection are both required.

  • Drop-in replacement for 185-Series Circuit Breakers
  • Visible reset lever shows open condition
  • Ignition protected - safe for installation aboard gasoline powered boats
  • Meets SAE J1171 external ignition protection requirements
  • Weather Resistant
  • Combines switching and circuit breaker function into one unit*
  • "Trip Free" - cannot be held closed after trip

* Do not use as a switch where high inrush currents are expected.


Amperage 30A
Maximum Voltage 48V DC
Mounting Surface Mount
Circuit Breaker Type Thermally responsive Bi-metal blade
Terminal Stud M6 (accepts 1/4" Ring Terminal)
Terminal Stud Torque 5.65 Nm (50 in-lb)
Interrupt Capacity 3000A @ 48V
Minimum Operating Temperature -40°C
Maximum Operating Temperature 85°C
Circuit Breaker Class Type III - switchable/manual reset - trip free
Weight 0.23 kg (0.50lb)


Trip Delay Curve for 285 Series Circuit Breakers

Trip Delay Curve 285 Series

SKU BSS.7181
Model # 7181
UPC/EAN 632085071813
Brand Blue Sea Systems
Shipping Weight 0.2300kg

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