Thermal circuit breakers feature recessed reset button which cannot be manually pulled out to disconnect the circuit. The white button has a red band around it for visible trip indication. Mounting is with knurled thumb nut on bushing. Wgt. less than 1.5 oz. 50 VDC-250 VAC. Interruption capacity is 2000 Amps at 40 VDC, 1000 amps at 350 VAC. Quick connect terminals. Amp rating in red. Apx size: 11/16 x 1-3/8 x 1-7/8, 7/16″ hole.