What this MCCB delivers for your panel
The Siemens 3VA2463-5KP32-0DH0 is a 3-pole SENTRON molded case circuit breaker rated for 630 A continuous current, with a breaking capacity of 187 kA at 240 V — that's a serious fault-current rating for main feeders or large motor branch circuits where the available short-circuit current is high. The ETU850 electronic trip unit gives you adjustable overload and short-circuit protection curves, so you can coordinate with downstream devices without nuisance tripping.
Derating and thermal management
The 630 A rating holds at 40 °C ambient; above that you need to derate. At 45 °C it's 600 A, at 50 °C it's 570 A, and it drops to 450 A at 70 °C. That matters when you're packing this into a warm enclosure — plan for the actual ambient, not the catalog number. Maximum power loss is 164.5 W, so ventilation or forced air may be needed in a tight cabinet.
Breaking capacity across voltages
Short-circuit performance varies by system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. That's a strong curve — it stays usable even on 690 V systems where many MCCBs drop off steeply.
Auxiliary and release options
Comes with an undervoltage release (UVR) for safety disconnects, plus 2 auxiliary switches and 1 trip alarm switch (HQ type) for status feedback to a PLC or annunciator. Communication function is built in — this variant is ready for remote monitoring without an add-on module.