What this 3VA2463-6KP32-0KC0 is and what it does
The Siemens SENTRON 3VA2463-6KP32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current, designed for line protection in low-voltage power distribution. It carries a maximum breaking capacity of 242 kA at 240 V and 187 kA at 415 V, which means it can safely interrupt fault currents up to those levels without upstream damage — critical for selectivity coordination in a panel. The unit includes a shunt trip (STL) release and two HQ auxiliary switches, plus a communication function for integration into a monitored distribution system. The basic switch variant is order code 3VA2463-6KP32-0AA0.
Rating depth: current, temperature, and breaking capacity
The continuous current rating of 630 A is at 40 °C ambient. Derate linearly through the table: 600 A at 45 °C, 570 A at 50 °C, down to 450 A at 70 °C. For a panel running hot — say 50 °C ambient — plan for 570 A continuous, not the full 630 A. The operating temperature range is -25 °C to 70 °C. Breaking capacity drops 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. For a 415 V industrial feeder, the 187 kA rating gives substantial headroom over typical available fault current. The adjustable thermal-magnetic trip range spans 945 A minimum to 5 670 A maximum, giving flexibility to coordinate with downstream breakers. Maximum power loss is 162 W — factor that into enclosure ventilation.
Physical fit and panel integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The 138 mm width (5.43 in) is standard for a 3-pole MCCB in this frame size — verify busbar spacing and mounting hole pattern against the existing panel layout. The 110 mm depth (4.33 in) includes the breaker body; add clearance for the shunt trip wiring and auxiliary switch connections.
Built-in communication and auxiliary functions
The communication function enables remote monitoring and control — useful for a facility moving toward smart distribution or needing breaker status in a SCADA system. The shunt trip (STL) allows remote trip via a control signal; the two HQ auxiliary switches provide status feedback (open/closed/tripped) to a PLC or annunciator panel.