The Siemens SENTRON 3VA2225-7HN32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in distribution panels. Its 330 kA interrupting capacity at 240 VAC handles high-fault scenarios common in industrial mains or large subfeeds, while the 242 kA at 415 V and 440 V keeps selectivity intact downstream. The 4.5 kA at 690 V is a derated figure for that voltage class — not the primary application for this frame.
Ratings and what they mean for fit
The 250 A continuous rating holds flat from 40 °C through 50 °C ambient — no derating needed in a typical 40 °C panel. At 55 °C it steps to 241 A, and at 70 °C it's 213 A. If your enclosure runs hot, that's the curve to check. Breaking capacity at 240 V is 330 kA, at 415 V and 440 V it's 242 kA, at 500 V it's 187 kA. Those numbers tell you this MCCB is built for high-available-fault-current installations — think transformer secondaries or busway taps — not light branch circuits. Power loss is 50.5 W maximum at rated load. That's dissipated heat inside the enclosure; factor it into your thermal budget if the panel is tightly packed. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The storage number governs handling and warehousing, not running conditions.
Integration and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. That 86 mm depth is the body only — account for handle throw and wiring space behind the panel. The 3-pole footprint fits standard SENTRON 3VA mounting patterns; no adapter plate needed for most Siemens switchboard or enclosure cutouts.
Built-in undervoltage release
This variant includes an undervoltage release (UVR) as the auxiliary release. That means the breaker trips if control voltage drops below a set threshold — common for safety disconnects on machine feeders or to prevent automatic reclosure after a sag. No auxiliary switch is fitted, so you don't get a separate status contact unless you add one.