The SENTRON 3VA1140-4EF36-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated 40 A at 40 °C, with a breaking capacity of 121 kA at 240 V AC — enough to clear high-fault conditions on a distribution bus without cascading upstream.
Breaking capacity that shrugs off the pit
At 240 V the breaker interrupts 121 kA; at 415 V it still handles 75.6 kA. That puts it well above a standard 25–50 kA distribution MCCB — built for the high available fault current you see on mine or mill transformer secondaries. The 3VA design is line-protection, not motor-protection, so it trip-curve coordinates with downstream feeders rather than with a starter overload.
Footprint: 130 mm tall, 76.2 mm wide, 70 mm deep — a 3-pole MCCB that fits standard DIN-rail or panel-mount enclosures. The undervoltage release (UVR) coil draws its own control circuit; the two auxiliary switches (HQ type) give you status contacts for PLC or lamp indication without an add-on block.