What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-5KP32-0AG0 is a 3-pole molded case circuit breaker rated for 250 A continuous at 40 °C. Its interrupting capacity climbs to 187 kA at 240 V AC and still holds 121 kA at 415 V and 440 V — enough for high-fault industrial service entrances or large panel feeders. At 690 V it derates to 4.5 kA, so this is not a 690 V main breaker; it's a 480 V class device with headroom. Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard SENTRON 3VA frame that drops into existing panel cutouts without re-drilling. Line protection design with communication function and a built-in auxiliary switch plus trip alarm switch (HP type) means the breaker reports its state to a PLC or BMS without an add-on module. Rated for operation from -25 °C to 70 °C, storage from -40 °C to 80 °C, with a maximum power loss of 48 W. No undervoltage release or ground-fault monitoring on this variant — those are add-on options if the BOM requires them.
Thermal derating and real-world loading
The 250 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 238 A, at 60 °C to 225 A, and at 70 °C to 200 A. If the panel ambient runs above 50 °C, factor the actual load against the derated curve — don't size by the nameplate alone.