What this MCCB delivers for the panel schedule
The Siemens SENTRON 3VA2225-7KP32-0BL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current, sized for line protection in distribution panels where the full-load ampacity sits at that level. The 330 kA interrupting capacity at 240 V means it can clear a bolted fault at the main service entrance without upstream coordination issues — that rating holds through 242 kA at 415/440 V and 187 kA at 500 V, so it handles the high-fault conditions common in industrial switchgear. At 690 V the breaking capacity drops to 4.5 kA, which still covers most motor-circuit faults at that voltage class. The thermal-magnetic trip curve is derated by ambient temperature: the breaker carries its full 250 A up to 50 °C, then steps down to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If the panel enclosure runs hot — say a non-ventilated cabinet near a furnace line — the 70 °C derating to 200 A is the figure to use for the load schedule.
Integration and mounting
The breaker occupies a 105 mm wide by 181 mm tall footprint with a depth of 86 mm — fits standard SENTRON panel cutouts and busbar risers. The 3-pole form factor bolts directly onto the mounting plate; no DIN-rail adapter needed for this frame size. Built-in auxiliary switch complement includes 2 auxiliary switches plus 1 trip alarm and 1 electrical alarm switch (HQ type), plus an undervoltage release. That covers remote status indication and shunt-trip capability without adding external relay logic. Communication function is onboard — the basic switch variant is 3VA2225-7KP32-0AA0, and this BL0 suffix adds the communication module for integration with a BMS or PLC.
Lifecycle and sourcing posture
Maximum power loss is 50.5 W at rated load — factor that into the enclosure thermal budget, especially if multiple breakers are ganged in a single cabinet. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.