The Siemens SENTRON 3VA1040-2ED32-0BH0 is a 3-pole molded case circuit breaker rated for 40 A continuous current at 40 °C, with a TM210 thermal-magnetic release for line protection. Its interrupting capacity hits 52.5 kA at 240 V and 32 kA at 415 V, so it handles high-fault commercial and industrial panel feeds without cascading upstream. The integrated undervoltage release (UVR) drops the breaker if control voltage is lost — a common requirement for safety circuits and emergency-stop chains.
Rated 40 A from 40 °C up through 50 °C, then it begins to taper: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, 36 A at 70 °C.