630 A MCCB with ETU560 — what the ratings mean for fit
The Siemens 3VA2463-6JQ32-0BL0 is a SENTRON molded case circuit breaker rated for continuous current Iu 630 A at 40 °C, with an ETU560 electronic trip unit providing line protection across a 3-pole configuration. Breaking capacity reaches 242 kA at 240 V and 187 kA at 415 V, so it handles high-fault-current industrial feeds without cascading upstream — the SCCR headroom is there for a main or large feeder breaker in a 480 V panel. The ETU560 release allows adjustable long-time, short-time, and instantaneous pickup, plus ground-fault monitoring via summation current formation on the L-conductor. Derating is published stepwise: 600 A at 45 °C, 570 A at 50 °C, down to 450 A at 70 °C — if the panel ambient runs above 40 °C, that derating curve is the real ampacity limit, not the 630 A nameplate.
Panel fit and integration
Dimensions are 248 mm high by 138 mm wide by 110 mm deep — a standard 3-pole MCCB footprint for a 630 A frame. The unit includes an undervoltage release (UVR) and a full auxiliary contact set: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type). Communication function is built in, so it can report status to a higher-level control system without an external module. The basic switch variant is 3VA2463-6JQ32-0AA0, and the integrated auxiliary trip is 3VA9608-0BB11 — both are the factory-fitted internal options on this order code. Maximum power loss is 164.5 W; factor that into enclosure ventilation if the breaker is in a sealed cabinet with other heat sources.