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 800 V rated insulation voltage means it handles line-to-line voltages common in 400 V and 480 V systems without derating the insulation.
What the ratings mean for your panel
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. That thermal curve matters if the breaker sits in a warm enclosure near other heat sources. 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.
Panel integration and footprint
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. No undervoltage release, no communication module, no ground-fault monitoring — it's a straightforward line-protection breaker with remote trip capability.