The Siemens SENTRON 3VA1125-3EF36-0AA0 is a 3-pole molded case circuit breaker rated 25 A at 40 °C, designed for line protection in distribution panels. The TM240 thermal-magnetic release provides fixed overload and short-circuit protection without adjustable trip settings — a straightforward fit for standard feeder circuits where coordination studies have already set the pickup. Breaking capacity reaches 75.6 kA at 240 V, stepping down to 52.5 kA at 415 V and 32 kA at 440 V. At 500 V and 690 V it holds 11.9 kA. These numbers cover most industrial service-entrance and sub-distribution scenarios; the 75.6 kA at 240 V is the figure to check against the available fault current at the panelboard. The 70 mm depth and 76.2 mm width fit standard SENTRON mounting footprints.
The 25 A rating holds steady from 40 °C through 50 °C. At 55 °C it derates to 24 A, and at 70 °C it reaches 23 A. Operating ambient range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Maximum power loss is 8.5 W, which factors into enclosure thermal calculations when grouping multiple breakers.