Motor protection MCCB with communication
The Siemens SENTRON 3VA2125-5MP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) purpose-built for motor protection, with a continuous current rating of 25 A that holds flat from 40 °C to 70 °C — no derating needed across typical panel ambient temperatures. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so it handles high fault currents on 240 V distribution while still clearing moderate faults on 690 V motor circuits. Adjustable trip classes (10A, 10/10E, 20/20E, 30/30E) let you match the overload curve to motor start characteristics. Built-in communication function and phase failure detection mean this breaker can report status and trip events to a PLC or SCADA, and it will drop the motor on loss of a phase — no separate phase monitor relay needed.
Panel fit and wiring
Dimensions of 181 mm height, 105 mm width, and 86 mm depth (7.13 × 4.13 × 3.39 in) fit standard MCCB panel cutouts and leave clearance for cable bending radius on 25 A motor feeders. Rated insulation voltage of 800 V provides headroom for system voltages up to that level. Maximum power loss of 0.6 W keeps heat dissipation low in a crowded enclosure — no forced cooling required for this single breaker.