The Siemens SENTRON 3VA2325-5HN32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V, which gives you headroom for high-fault industrial services without cascading upstream.
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — standard SENTRON 3VA2 footprint for a 250 A frame. Maximum power loss is 37.5 W, which factors into enclosure thermal calculations if you're stacking multiple breakers in a sealed cabinet. The breaker is rated to run at its full 250 A even at 70 °C ambient, so no derating curve to chase for most industrial environments.