630 A MCCB with high interrupting capacity for line protection
The Siemens SENTRON 3VA2463-6HN32-0KC0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a thermal derating curve dropping to 520 A at 70 °C. Its interrupting capacity reaches 242 kA at 240 V AC and 187 kA at 415/440 V, falling to 9 kA at 690 V — the high 240 V figure signals a design for low-voltage main feeders where fault current can exceed 200 kA. The breaker carries a shunt trip release (STL) and two HQ auxiliary switches, so it integrates into emergency-stop or remote-trip circuits without an add-on module. Maximum power loss is 162 W, which matters for enclosure ventilation planning.
Dimensions and panel fit
The breaker measures 248 mm high by 138 mm wide by 110 mm deep. The 110 mm depth is the dimension that governs enclosure depth selection — standard 200 mm deep enclosures leave 90 mm for wiring and bending radius behind the breaker. Width at 138 mm is the panel cutout constraint for multi-pole mounting.