Siemens SENTRON 3VA2463-5KP32-0KL0 — 630 A MCCB for Line Protection
The Siemens SENTRON 3VA2463-5KP32-0KL0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, designed for line protection in distribution panels. Its 187 kA breaking capacity at 240 VAC means it can safely interrupt fault currents up to that level without upstream cascading — critical for high-fault locations like substation feeders or large motor control centers. At 415 VAC the rating holds at 121 kA, and at 690 VAC it still clears 9 kA, covering most industrial voltage tiers. This breaker carries a communication function for integration into plant monitoring systems, plus a shunt trip release (STL) for remote emergency-off circuits. The auxiliary switch block includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch — enough to signal breaker status back to a PLC or SCADA without an external interface module.
Thermal Derating and Power Loss — Panel Design Constraints
The continuous current rating derates with ambient temperature: 630 A at 40 °C, 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. If your panel ambient runs above 40 °C, size the breaker for the derated value — not the 630 A nameplate. Maximum power loss is 162 W, which drives ventilation or enclosure sizing in sealed cabinets. Dimensions are 248 mm height, 138 mm width, and 110 mm depth — a standard SENTRON 3VA form factor that fits existing Siemens panel layouts and busbar systems. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.