What it is and what it does
The Siemens 3VA2463-7HN32-0BA0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, with a 3-pole configuration and an ETU350 electronic trip unit. It's built for line protection — meaning it sits upstream protecting a feeder or a large load, not a branch motor starter. The interrupting ratings are serious: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. That kind of short-circuit capacity tells you this breaker is sized for high-fault panels — think main switchboard or a large distribution board where available fault current is well above what a standard 65 kA MCCB can handle.
Ratings and what they mean for fit
The 630 A rating at 40 °C is the headline number, but it derates as ambient temperature climbs: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. If your panel runs hot — say 50 °C inside — you're actually getting 593 A of continuous capacity, not the full 630 A. That matters when sizing for a non-overload trip point. The rated insulation voltage is 800 V, so it's comfortable in 690 V systems. Power loss is 164.5 W maximum, which adds to panel heat load; factor that into your enclosure cooling calc.
Integration notes
The breaker measures 138 mm wide, 248 mm high, and 110 mm deep. It's a standard MCCB footprint for DIN-rail or panel-mount installation — no oddball dimensions that force a sub-panel rework. An undervoltage release (UVR) is built in, with the release design specified as undervoltage release (UVR) type. The integrated auxiliary trip is part number 3VA9608-0BB11, and the supplied basic switch is 3VA2463-7HN32-0AA0. No auxiliary contact version is included, so if you need status feedback to a PLC, you'll add an external auxiliary contact block. No communication function, no phase failure detection, no ground fault monitoring — this is a straightforward line-protection breaker, not a smart metering device.