The Siemens SENTRON 3VA1125-4EF32-0AD0 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. Sized for line protection duty, meaning it's the primary overcurrent device on a feeder or branch circuit, not a motor-protective breaker with integrated overload class.
The SCCR curve drops predictably as voltage climbs: 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Full 25 A rating holds through 50 °C ambient; above that it steps down: 24 A at 55–60 °C, 23 A at 65–70 °C. Mounting dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits most DIN-rail or direct-panel backplate layouts without re-drilling.