The Siemens SENTRON 3VA2463-6HN32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 242 kA at 240 V AC. This is a line-protection device (not a motor-protective breaker) designed for main feeder or large sub-feed applications in industrial switchboards and panelboards. The 630 A frame means it handles the full load of a large transformer secondary, a main bus riser, or a high-current distribution point — the kind of circuit where a fault can deliver tens of kiloamps, and the breaker has to clear it without welding or venting.
Breaking capacity and thermal derating
Breaking capacity drops as system 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 — if your system runs at 690 V with available fault current above that, this breaker is not the right pick. The 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. If the panel ambient runs at 50 °C, the usable rating drops to 593 A — factor that into the load calculation.
Lifecycle and sourcing
The lifecycle stage is marked as current — meaning the manufacturer lists it as an active, in-production catalog number. No discontinuation notice or last-time-buy date is on record. For BOM-line sourcing, this part is quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Physical fit and integration
Dimensions: 248 mm height, 138 mm width, 110 mm depth. The 110 mm depth is the critical dimension for enclosure depth — standard 200 mm deep enclosures leave 90 mm for wiring and lug bending behind the breaker. The 138 mm width per pole (46 mm/pole) is typical for a 630 A frame; verify the mounting footprint against the existing backplate or DIN-rail adapter if retrofitting into a panel designed around a different MCCB family.
Auxiliaries and releases
This variant ships with an undervoltage release (UVR) and two auxiliary switches (HQ type). The UVR trips the breaker when control voltage drops below the dropout threshold — common for emergency-stop circuits or undervoltage protection on motor feeders. The auxiliary switches provide status feedback (open/closed/tripped) to a PLC or indication lamp. No ground-fault monitoring or communication module is included on this order code.