The Siemens SENTRON 3VA1463-5EF32-0AC0 is a 3-pole molded case circuit breaker rated for 630 A continuous current across ambient temperatures up to 50 °C, with a TM240 thermal-magnetic overcurrent release and two built-in HQ auxiliary switches. Its breaking capacity reaches 187 kA at 240 VAC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V — so it handles high-fault utility feeds and large motor branch circuits where fault current is substantial.
Ratings and what they mean for the panel
The 630 A rating holds at 40, 45, and 50 °C; it derates to 618 A at 55 °C, 607 A at 60 °C, 595 A at 65 °C, and 583 A at 70 °C. That means in a warm enclosure — say, a packed MCC lineup — you don't lose headroom until above 50 °C. The rated insulation voltage is 800 V, so the breaker is suitable for 690 V systems with margin. Maximum power loss is 192.9 W — a figure to check when estimating heat load in a sealed cabinet. The breaker carries no undervoltage release, no ground-fault monitoring, and no communication module; it's a straight thermal-magnetic device with auxiliary contacts for status feedback.