The Siemens SENTRON 3VA2063-5KP32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 63 A at ambient temperatures up to 50 °C, with a slight derating curve above that — 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. It carries a rated insulation voltage of 800 V and delivers a breaking capacity of 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. That kind of interrupting rating means it can clear high-fault-current events on the line side of a large distribution panel without upstream coordination headaches — the SCCR headroom is substantial for a 63 A frame.
Trip unit and auxiliary hardware
This breaker is fitted with an ETU850 electronic overcurrent release — that's the top-end trip unit in the 3VA2 platform, offering programmable LSI protection curves plus communication capability. The basic switch assembly is order code 3VA2063-5KP32-0AA0, and the integrated auxiliary trip module is 3VA9688-0BL32.
Maximum power loss is 5.4 W, which is modest for a 63 A electronic-trip breaker — no special ventilation required in a typical enclosure.