What this MCCB carries — and where the ratings matter
The Siemens 3VA2463-6JQ32-0KC0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in 3-pole configuration. Its continuous current rating is 630 A at 40 °C, with a full thermal derating curve down to 450 A at 70 °C — so the actual ampacity in a warm panel is the number to spec, not the 40 °C headline. Breaking capacity runs from 242 kA at 240 V down to 9 kA at 690 V. At the common 415 V industrial bus, it interrupts 187 kA — that's the figure a fault-current study checks against. The electronic trip unit is adjustable between 945 A and 5 670 A (minimum to maximum), with a full-scale value of 630 A. No trip indicator, but undervoltage release is built in as a shunt trip (STL). Two auxiliary switches HQ are included for status feedback to a PLC or annunciator.
Panel fit and integration
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That 110 mm depth is the key clearance number for a shallow enclosure backpan — verify the gland plate or rear-mounted bus bars have room before committing the cutout. Maximum power loss is 162 W at rated load. That heat stays inside the enclosure; factor it into the panel's thermal budget alongside drives and contactors. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions.
Lifecycle and sourcing posture
The base switch variant is 3VA2463-6JQ32-0AA0; this -0KC0 suffix adds the shunt trip and auxiliary switch complement. If a BOM line already carries the -0AA0, verify the auxiliary configuration matches before substituting.