MCCB with shunt trip – 80 A, 75.6 kA interrupting at 240 V
The Siemens SENTRON 3VA1180-3EF36-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, with a thermal-magnetic overcurrent release (TM240) and an integrated shunt trip release (STL) for remote tripping. Its interrupting rating hits 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 32 kA at 440 V — enough headroom for most industrial distribution panels where fault currents can run high.
The 80 A continuous rating holds from 40 °C up to 50 °C without derating — at 55 °C it's still 78 A, and at 70 °C it's 74 A. The interrupting ratings at different voltages let you coordinate selectivity downstream: at 240 V you get 75.6 kA, at 415 V it's 52.5 kA, and at 690 V it's still 11.9 kA. For a 400 V distribution board with a transformer secondary capable of 50 kA fault current, this breaker clears it without cascading upstream.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most DIN-rail or panel-mount enclosures without re-drilling. The shunt trip release (STL) is factory-installed, so no field wiring of an external trip coil is needed.