150 Amp Manual Reset (Switchable) Hi-Amp Circuit Breaker (1 Per Quantity) These breakers operate until tripped and will remain tripped (in the off position) until indicator lever is manually reset to reactivate or close the open circuit. Typically used in primary feeder circuits in trucks buses RVs and marine applications; also used in battery chargers and welding equipment. The manual reset style possesses a unique reset mechanism which provides a positive visible indication of a tripped condition. Operating temperature: -25F to 180F. Storage temperature: -30F to 300F.