What it is and what it does
The Siemens SENTRON 3VA2463-7HL32-0KJ0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current, designed for line protection in distribution panels and industrial switchgear. Its breaking capacity hits 330 kA at 240 V and 242 kA at 415 V, meaning it can safely interrupt very high fault currents without upstream damage — critical for high-available-fault installations like large motor control centers or transformer secondaries.
Ratings that matter for fit
The continuous current is 630 A at 40 °C, derating to 520 A at 70 °C — so if your panel ambient runs hot, the effective ampacity drops. Maximum breaking capacity spans 5 670 A (the high end of the adjustable trip range) down to a minimum of 945 A, giving you selectivity headroom downstream. The unit carries a shunt trip release (STL) and two auxiliary switches plus one trip alarm switch, which means you can remotely trip it and get status feedback without adding external relays.
Panel integration and dimensions
Mounts on a standard DIN rail or directly to a backplate via the four mounting slots. Dimensions are 248 mm high, 138 mm wide, 110 mm deep — fits a typical 600 mm wide enclosure with room for cable entry below. The 3-pole block occupies three module positions; leave clearance above for the arc chute exhaust.