What this MCCB delivers on the line side
The Siemens SENTRON 3VA2225-6HN32-0CC0 is a 3-pole molded case circuit breaker rated for 250 A continuous at 40 °C, designed for line protection in distribution panels. Its breaking capacity reaches 242 kA at 240 V AC, 187 kA at 415/440 V, 121 kA at 500 V, and 4.5 kA at 690 V — meaning it can safely interrupt fault currents across a wide voltage range without cascading upstream. The unit includes an undervoltage release (UVR) and two HQ auxiliary switches, so it integrates into safety circuits and remote status monitoring without an add-on module.
Sizing and thermal performance
Rated 250 A at 40, 45, and 50 °C ambient, the breaker holds full ampacity through 50 °C. Above that it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. For a panel running warm — say a packed enclosure near a furnace line — that derating curve tells you exactly where you stand without guessing. Maximum power loss is 50.5 W, which factors into enclosure thermal calculations.
Panel fit and auxiliaries
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard SENTRON 3VA frame that mounts on a DIN rail or panel-mount plate. The two HQ auxiliary switches and the undervoltage release are factory-fitted, so you do not need to order them separately or open the cover. The base switch variant is 3VA2225-6HN32-0AA0; the -0CC0 suffix adds the UVR and aux switches as a configured assembly. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C.