The Siemens SENTRON 3VA2125-8JP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection at 25 A continuous, with no derating across the full ambient range from 40 °C to 70 °C — the current rating holds flat at 25 A through 70 °C, which simplifies panel sizing in warm enclosures. Breaking capacity is 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — these figures govern the available fault current the breaker can safely interrupt at each system voltage level.
The 25 A rating with ETU550 trip unit allows coordination with downstream and upstream breakers. The flat current rating across temperature means no thermal derating factor is needed.