What it is and what it does
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. It ships with a shunt trip (STL) auxiliary release and two HQ auxiliary switches. The basic switch assembly is order code 3VA2063-5KP32-0AA0, and the integrated auxiliary trip module is 3VA9688-0BL32. No undervoltage release, no phase-failure detection, no ground-fault monitoring on this variant — those are separate option slots if you need them.
Physical fit and panel integration
The 3VA2063-5KP32-0JC0 measures 105 mm wide, 181 mm high, and 86 mm deep. That width is the standard 3-pole MCCB footprint for the 3VA2 frame — it occupies three 35 mm DIN-rail module spaces if you're mounting it on a rail, or it bolts into a fixed panel mount. The 86 mm depth is shallow enough to clear most standard gland plates and backpanel wiring ducts. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. 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.