The Siemens SENTRON 3VA1125-3EF32-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its breaking capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V — enough for high-fault panelboards where upstream coordination demands a robust interrupting rating. The fixed thermal release holds 25 A flat through 50 °C, then derates to 22.5 A at 70 °C; if your enclosure runs hot, size for the 70 °C column.
At 240 V the 3VA1125-3EF32-0AC0 clears 75.6 kA; at 415 V it clears 52.5 kA; at 440 V it clears 32 kA; at 690 V it clears 10.5 kA. That voltage-dependent curve means the same breaker can serve a 480 V distribution panel (32 kA SCCR) or a 240 V subfeed (75.6 kA) without changing the line-up. The TM240 release has an adjustable time delay tr up to 1 s, letting you coordinate with downstream branch breakers on a selective trip scheme.
Panel integration and auxiliary contacts
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — fits standard 3-pole MCCB mounting footprints. Two HQ auxiliary switches are built in, giving you a normally-open and normally-closed status contact for PLC or indication without an add-on module.