Drop-in replacement for 185-Series circuit breakers. Visible reset lever shows open condition. Trip-free design, cannot be held closed after trip. Thermally responsive bi-metal blade Circuit Breaker Class Type III - Switchable/Manual Reset. Terminal Stud Size M6 Uses 1/4 (M6) screw. Meets SAE J1171 external ignition protection requirements. IP67 compliant, temporary immersion for 30 minutes.