630 A MCCB with 330 kA interrupting capacity
The Siemens SENTRON 3VA2463-7HN32-0AF0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum interrupting capacity of 330 kA at 240 V AC. That 330 kA figure drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and 9 kA at 690 V — so the available fault current at the installation point dictates which voltage tap you use for the interrupting rating. The breaker carries a current-production lifecycle status, meaning it remains in the active Siemens catalog and is available through the authorized channel.
Thermal derating and power loss
Continuous current derates with ambient temperature: 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. Maximum power loss is 162 W. For panel builders, that derating curve means the breaker must be installed with adequate ventilation or spacing if the enclosure ambient runs above 40 °C — a common oversight when packing multiple high-current breakers into a sealed cabinet.
Physical footprint and auxiliary configuration
Dimensions are 110 mm deep, 138 mm wide, and 248 mm high. The breaker ships with one auxiliary switch and one trip alarm switch (HQ designation), and no undervoltage release or ground-fault monitoring module. The basic switch variant is 3VA2463-7HN32-0AA0. For a panel retrofit, verify the 138 mm width clears the adjacent device spacing — this is a full-size frame, not a compact MCCB.
Environmental and operating limits
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The breaker includes a trip indicator and is designed for line protection (not motor or generator protection). No communication function or voltage trigger is fitted on this order code.