Siemens SENTRON 3VA1040-3ED32-0KA0 — 40 A MCCB with Shunt Trip
The Siemens 3VA1040-3ED32-0KA0 is a 3-pole molded case circuit breaker from the SENTRON family, rated for line protection duty. It carries 40 A continuously at 40 °C ambient, with no derating needed until you cross 55 °C — at 55 °C it still holds 38.4 A, and at 70 °C it holds 36 A. That thermal curve matters if this breaker lives in a crowded panel where ambient runs hot. Interrupting capacity is the headline: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500 V and 690 V. That 75.6 kA figure at 240 V puts it in the high-fault tier for commercial and light industrial distribution — it clears a serious bolted fault without upstream coordination headaches. The TM210 overcurrent release handles the trip curve; there's no ground-fault module on this variant.
Shunt Trip and Panel Fit
This version includes a shunt trip release (STL) for remote tripping — you can trigger it from an E-stop, a safety relay, or a PLC digital output. The shunt trip is factory-fitted; no field-kit installation needed. There's no undervoltage release, no communication module, and no trip indicator on this order code. The breaker is 76.2 mm wide, 130 mm tall, and 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or panel-mount enclosures. Power loss at full load is 10.8 W, so factor that into your thermal budget if you're stacking breakers in a small enclosure.