Siemens 3VA1040-3ED36-0CC0 — 40 A SENTRON MCCB for Line Protection
Its interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V, so it handles high-fault scenarios typical of industrial mains without cascading upstream.
Interrupting Ratings and Coordination
This breaker's interrupting curve is steep: 75.6 kA at 240 V, dropping to 52.5 kA at 415 V, then 32 kA at 440 V, and settling at 7.5 kA from 500 V up to 690 V.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON distribution blocks and panelboard mounting bases.
At 55 °C it derates to 38.4 A, and at 70 °C it holds 36 A — a gentle slope that keeps the breaker usable in hot switchgear rooms without oversizing. Maximum power loss is 13.3 W, so in a multi-breaker panel the cumulative heat stays manageable without forced ventilation.