630 A MCCB for main feeder and high-fault panels
The Siemens SENTRON 3VA2463-6HN32-0AL0 is a 3-pole molded case circuit breaker rated 630 A continuous at 40 °C, designed for line protection in main distribution panels and high-current feeders. Its 242 kA interrupting capacity at 240 V gives headroom for high-fault installations where SCCR coordination is critical — think large transformer secondaries or service-entrance positions where a lower-rated breaker would cascade upstream. The breaker carries a 162 W maximum power loss at full load, which matters for enclosure thermal management — a panel with multiple high-current breakers needs that heat accounted for in the ventilation or derating calculation.
Breaking capacity across voltage taps
Interrupting ratings drop as voltage rises: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. At 690 V the 9 kA figure is the limiting case — verify the available fault current at that voltage before committing the BOM line. The continuous current derates with ambient temperature from 630 A at 40 °C down to 520 A at 70 °C. If the breaker sits in a warm enclosure or near other heat sources, use the 50 °C or 60 °C column (593 A and 557 A respectively) for the realistic ampacity.
Auxiliary switch configuration and monitoring
This variant ships with 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ type). The trip alarm signals a fault trip separately from the auxiliary position feedback — useful for remote status monitoring on a PLC input or for triggering a maintenance alert on a conveyor line's main feeder. No undervoltage release or shunt trip is fitted from the factory (: No: No). If the application needs remote tripping or undervoltage protection, those accessories must be added separately.
Physical fit and panel integration
Dimensions are 248 mm height, 138 mm width, 110 mm depth (9.76 × 5.43 × 4.33 inches). The 138 mm width is the standard 3-pole MCCB footprint for this SENTRON frame — it mounts on a DIN rail or directly to a backplate via the breaker's own mounting lugs. Verify the depth clearance in the enclosure: 110 mm plus wiring space for the line and load lugs.
Environmental limits and storage
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limits govern handling and warehousing — the breaker can sit in a cold warehouse without damage, but must be at operating temperature before being loaded.