630 A MCCB with high interrupting capacity for line protection
The Siemens SENTRON 3VA2463-7HN32-0HL0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, designed for line protection in industrial power distribution. It carries a maximum breaking capacity of 330 kA at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 9 kA at 690 V — meaning it can safely interrupt fault currents up to those levels without cascading upstream, which is the key spec for selectivity coordination in a distribution board. The breaker is fitted with 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ configuration), plus a shunt trip release (STL) for remote tripping. It includes a trip indicator and a voltage trigger, but no undervoltage release and no ground-fault monitoring. The auxiliary switch complement is worth noting for panel builders who need status feedback to a PLC or SCADA — the HQ variant covers both position and alarm signaling without adding external relays. Power loss at rated current is 162 W maximum, which drives thermal management inside the enclosure — factor that into cabinet cooling if the panel is densely populated. Ambient temperature derating is published from 40 °C through 70 °C: 630 A at 40 °C, 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. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.
Panel fit and mounting dimensions
Dimensions are 248 mm height, 138 mm width, and 110 mm depth. The 138 mm width is the standard 3-pole MCCB footprint for this current class — it occupies three 45 mm module positions on a DIN rail or bolts directly to a mounting plate. The 110 mm depth includes the arc chamber and terminal clearance; verify front-panel door clearance if the breaker is mounted in a deep enclosure with a swing frame. The 162 W power loss at full load should be factored into the enclosure thermal calculation, especially in a sealed cabinet with no forced ventilation.