What this 250 A MCCB is and what the ratings mean for fit
The Siemens 3VA2225-6HL32-0AH0 is a SENTRON molded case circuit breaker rated for 250 A continuous current, 3-pole, designed for line protection in distribution panels. The 242 kA interrupting capacity at 240 V tells you this breaker can clear a massive fault without welding its contacts or rupturing the case — that's the kind of SCCR headroom you need on the main feeder of a high-capacity switchboard. At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V, so the interrupting rating follows the voltage curve as expected for this class. Thermal derating matters when you're packing breakers into a warm enclosure: at 40 °C ambient it carries the full 250 A, but at 55 °C it's 241 A, at 70 °C it's 213 A. If your panel runs hot — say next to a motor drive or in a non-conditioned electrical room — size the feeder for the derated number, not the nameplate. The breaker also carries 2 auxiliary switches plus a trip alarm switch (HQ design), which gives remote status indication without needing an external relay.
Dimensions and panel fit
The breaker measures 86 mm deep, 105 mm wide, 181 mm tall. That 105 mm width for a 3-pole 250 A frame is typical for the SENTRON 3VA2 platform — it'll drop into a standard MCCB cutout pattern. If you're swapping an older 3VA2 variant, the footprint is the same; the wiring lugs and bus-bar connections are in the same positions. No re-drilling the backplate.