630 A MCCB with 242 kA interrupting capacity
The Siemens 3VA2463-6HN32-0JL0 is a SENTRON molded case circuit breaker rated for 630 A continuous current at 40 °C, with a 242 kA interrupting capacity at 240 V AC. That's enough headroom to clear a bolted fault on a large distribution transformer without the breaker itself failing — critical for selectivity in a multi-level panel. The interrupting rating drops to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V, so verify the available fault current at your system voltage before specifying. It's a 3-pole line-protection breaker with an ETU350 electronic trip unit — adjustable long-time, short-time, and instantaneous settings, plus ground-fault alarm capability (though this variant ships without ground-fault monitoring). The shunt trip (STL) release allows remote tripping, and the auxiliary contact block provides 2 auxiliary switches plus 1 trip alarm and 1 electrical alarm switch (HQ). Mounts in a standard panel or enclosure — dimensions are 248 mm high, 138 mm wide, 110 mm deep. The 162 W maximum power loss at full load means the enclosure needs adequate ventilation or derating above 40 °C; the continuous current derates to 520 A at 70 °C ambient.
Sourcing and compliance
Sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ. The breaker carries the usual Siemens compliance documentation — RoHS, REACH, and IEC/UL certifications for the 3VA series are available on request.