The Siemens 3VA1140-6EF36-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current at 40 °C ambient, with a 3-pole configuration and a TM240 thermal-magnetic overcurrent release designed for line protection.
Breaking capacity and selectivity headroom
Breaking capacity is specified at multiple voltage levels: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V.
Above that, derating is gradual: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C.