What this MCCB is and what it carries
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. This variant is configured for line protection with a shunt trip (STL) release and two HQ auxiliary switches built in. No undervoltage release, no ground-fault monitoring, no communication module — it's a straightforward power breaker.
Panel fit and thermal budget
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — standard SENTRON 3VA2 footprint for a 250 A frame. Mounts on a DIN rail or panel-mount plate; verify gland-plate clearance for the 110 mm depth in shallow enclosures. Maximum power loss is 37.5 W, which factors into enclosure thermal calculations if you're stacking multiple breakers in a sealed cabinet. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. 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.