What it is and what it does
The Siemens SENTRON 3VA2225-7KP32-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in industrial power distribution. Its interrupting capacity reaches 330 kA at 240 V AC, 242 kA at 415/440 V, 187 kA at 500 V, and 4.5 kA at 690 V — the 690 V figure tells you this breaker is optimized for low-voltage main feeders, not 690 V motor circuits. Thermal derating is published from 40 °C through 70 °C: full 250 A up to 50 °C, then 238 A at 55 °C, stepping down to 200 A at 70 °C. That curve matters for panel ambient calculations — if your enclosure runs hot, you lose headroom fast.
Configuration and integration
This MCCB ships with a shunt trip (STL) for remote tripping and two auxiliary switches (HQ) for status feedback to a PLC or annunciator panel. It includes communication and measurement functions — the exact protocol isn't listed here, but the presence of those functions means it can report current, power, and event data over a bus, which saves running separate CTs and meters for basic monitoring. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for a 250 A frame. No trip indicator on the front face; trip status comes from the auxiliary switches or the communication channel.
Lifecycle and sourcing
Maximum power loss is 48 W at rated load, so factor that into your panel thermal budget if you're packing several breakers in a small enclosure. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.