The Siemens 3VM1140-5EE32-0AA0 is a SENTRON 3-pole molded case circuit breaker rated 40 A continuous at 40 °C, with a TM220 thermal-magnetic trip unit for line protection. Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V, 76 kA at 440 V, and still 17 kA at 500 V — so it clears high-fault scenarios without cascading upstream, especially on 240 V distribution where the 187 kA figure covers virtually any industrial fault.
Trip unit and thermal performance
TM220 means a fixed thermal-magnetic release with no interchangeable rating plugs — what you see is what protects the feeder. The 40 A rating holds flat through 50 °C; at 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. Maximum power loss is 11 W, so heat rejection inside the enclosure stays manageable.
The breaker measures 70 mm deep by 76.2 mm wide by 130 mm tall — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and DIN-rail adapters without re-drilling gland plates.