Siemens SENTRON 3VA1140-6EF32-0KC0 — 40 A MCCB with Shunt Trip
The Siemens SENTRON 3VA1140-6EF32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 40 A across the ambient range from 40 °C to 50 °C, derating to 37 A at 70 °C. Its interrupting capacity reaches 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that place it in the high-fault category for industrial main or feeder duty where available fault current exceeds typical 25–65 kA MCCB ratings. The breaker ships with a factory-fitted shunt trip release (STL) and two auxiliary switches HQ, making it suited for remote trip and status feedback in automated control schemes.
Breaking Capacity and Selectivity Planning
At 500 V and 690 V the interrupting rating drops to 17 kA. The rated insulation voltage of 800 V gives headroom for 690 V systems without de-rating the internal clearances.
Physical Fit and Panel Integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a 3-pole MCCB footprint that fits standard Siemens SENTRON 3VA mounting bases and busbar systems without adapter plates. Maximum power dissipation is 10.8 W, which should be factored into enclosure thermal calculations when grouping multiple breakers in a sealed panel.
Environmental and Compliance
Operating temperature range spans -25 °C to 70 °C; storage range extends from -40 °C to 80 °C, covering most indoor industrial environments and unheated warehouses.