The Siemens SENTRON 3VA1140-3EF36-0KC0 is a 3-pole molded case circuit breaker rated for 40 A continuous at 40 °C, with a 75.6 kA interrupting capacity at 240 V AC — enough headroom for most industrial service-entrance or feeder applications where fault current runs high. At 415 V the interrupting rating drops to 52.5 kA, and at 440 V to 32 kA; at 500 V and 690 V it holds at 11.9 kA. That means the same breaker can serve a 480 V panelboard with a 32 kA SCCR requirement, or a 600 V class motor control center at 11.9 kA — no need to swap frame sizes for different voltage levels in the same plant. Thermal derating is mild: the breaker holds 40 A up to 50 °C, then drops to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C. If your panel ambient runs 55 °C or higher, factor that 1–3 A reduction into the load schedule.
Integration into a panel
The breaker occupies 76.2 mm width, 130 mm height, and 70 mm depth. The shunt trip lets a remote emergency-stop or PLC signal drop the breaker; the aux switches report open/closed status back to the control system. No undervoltage release is included — if you need UVR for a safety circuit, this variant is not the one.