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. Has 6-32 screw terminal w/lock washer . 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. Approximate size: 11/16″ x 1- 3/8″ x 1-3/4″, 1/2″ hole.