25 A MCCB with 187 kA interrupting capacity — line protection for high-fault panels
The Siemens SENTRON 3VA1125-5EF36-0AD0 is a 3-pole molded case circuit breaker rated for 25 A continuous at 40 °C ambient, using a TM240 thermal-magnetic release. It carries a 187 kA interrupting capacity at 240 V, stepping down to 121 kA at 415 V and 75.6 kA at 440 V, with 17 kA available at both 500 V and 690 V.
The 25 A rating holds flat from 40 °C through 50 °C, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C. Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm tall — standard 3-pole MCCB footprint for DIN-rail or mounting-plate installation. The 8.5 W dissipation per unit adds up in a multi-breaker enclosure; check the panel thermal budget if you are packing several in a row.