MCCB for high-current line protection
The Siemens SENTRON 3VA2463-6KP32-0DC0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, with a maximum breaking capacity of 242 kA at 240 V AC. It is designed for line protection in distribution panels, with an undervoltage release (UVR) and two HQ auxiliary switches built in. The unit includes a communication function for integration into higher-level monitoring systems.
Breaking capacity and derating
Breaking capacity varies with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. The continuous current rating derates with ambient temperature — from 630 A at 40 °C down to 450 A at 70 °C. Maximum power loss is 164.5 W. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.
Panel integration and dimensions
The breaker measures 248 mm high, 138 mm wide, and 110 mm deep. It mounts on a DIN rail or directly to a panel backplate. The 3-pole footprint is standard for this class; the auxiliary switches and UVR are factory-installed, so no additional wiring for those functions is needed during panel assembly.