The Siemens SENTRON 3VA2225-6HN32-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in distribution panels. Its breaking capacity reaches 242 kA at 240 V AC and 187 kA at 415 V, with a derated 4.5 kA at 690 V — the high interrupting ratings make it suited for main feeder duty where fault currents are substantial.
Continuous current holds at 250 A from 40 °C through 50 °C ambient, then derates to 241 A at 55 °C and 213 A at 70 °C — useful to know if the breaker sits in a warm enclosure or near other heat sources. Breaking capacity varies sharply with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. The 690 V figure is the one that catches people — if your panel runs 690 V line-to-line, this breaker is only good for 4.5 kA fault current, so verify the available fault current at that voltage before specifying. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage max is higher because the breaker isn't carrying current — handling, not running, is what that limit governs.
Built-in accessories
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. The 105 mm width is the same as other 3VA2 3-pole frames in the 250 A class, so swapping within the series usually keeps the same bus bar spacing and mounting hole pattern.