The Siemens SENTRON 3VA2463-6HL32-0BA0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with an ETU320 electronic overcurrent release. That 630 A figure is the Iu — the uninterrupted current the breaker carries in a 40 °C ambient. Above that, the thermal derating curve drops to 612 A at 45 °C, 593 A at 50 °C, and so on down to 520 A at 70 °C, so the actual ampacity in a hot panel is lower than the nameplate suggests. The 242 kA breaking capacity at 240 V is the maximum fault current it can safely interrupt at that voltage; at 415 V and 440 V that drops to 187 kA, at 500 V to 121 kA, and at 690 V to 40 kA. The ETU320 release is a basic electronic trip unit — no communication function, no phase failure detection, no ground fault monitoring. It handles line protection (overload and short-circuit) with an undervoltage release (UVR) built in as the auxiliary release.
At 138 mm wide, 248 mm tall, and 110 mm deep, this MCCB fits standard SENTRON 3VA mounting footprints. The 3-pole block occupies roughly the same DIN-rail or screw-mount space as other 630 A frame breakers in the series. Maximum power loss is 164.5 W — that's the heat to vent in the enclosure, not a trivial number for a sealed stainless steel box.