MCCB for motor protection — 40 A, 121 kA at 415 V
The Siemens SENTRON 3VA2140-5MN32-0KL0 is a 3-pole molded case circuit breaker (MCCB) rated 40 A continuously from 40 °C up through 70 °C ambient — no derating needed across that span, which simplifies panel design in warm enclosures. Its interrupting capacity hits 121 kA at 415 V, enough for high-fault utility feeds or transformer secondaries without cascading upstream. The motor-protection design includes phase failure detection, so it catches a lost phase before the winding overheats.
Built-in accessories — shunt trip and auxiliary switches
This breaker ships with a shunt trip release (STL) for remote tripping and a complement of auxiliary switches: two auxiliary switches plus one trip alarm switch plus one electrical alarm switch HQ. That covers remote status indication and emergency-off integration without adding external relay logic. The trip indicator and voltage trigger are present, so a downstream PLC or SCADA gets a clear signal on the event.
Dimensions and panel fit
At 86 mm deep, 105 mm wide, and 181 mm tall, the 3VA2140-5MN32-0KL0 fits the standard SENTRON 3VA footprint. Panel cutout and bus-bar spacing match the 3VA family — no re-drilling if you are swapping from another 3VA frame. The 3-pole block occupies a single mounting position in a distribution board or motor control center.