What this 250 A MCCB does on the line
The Siemens SENTRON 3VA2225-6JP32-0DH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across a 40 °C to 50 °C ambient range, meaning it holds that full rating without derating in most standard panel environments. Above 55 °C it steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — so if your panel runs hot, size the load to the derated figure, not the nameplate. Breaking capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. That 242 kA at 240 V is the headline number for high-fault service-entrance or distribution panels where available short-circuit current is high — it safely interrupts faults up to that level without cascading upstream. It is designed for line protection (not motor or generator protection), so the trip curve and accessories are set for feeder and distribution duty. It includes an undervoltage release (UVR) and two auxiliary switches plus one trip alarm switch (HQ) — that covers remote status and undervoltage trip in one package. Communication function is built in, so it can talk to a higher-level system for monitoring or selective coordination.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA frame size that fits existing DIN-rail or screw-mount panel layouts. The 86 mm depth (3.39 in) is the dimension to check against enclosure clearance, especially if you're retrofitting into a panel with a shallow door or busbar stack behind the breaker. The basic switch variant is 3VA2225-6JP32-0AA0; this order code adds the undervoltage release and auxiliary switch complement. If you already have the base breaker in a panel, the accessory set here is pre-integrated — no field wiring of separate UVR or aux blocks needed.