What this MCCB carries and where it fits
The Siemens SENTRON 3VA2063-6JP46-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries a 242 kA interrupting capacity at 240 V, dropping to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. That kind of headroom on the interrupting side means it can sit upstream of a high-fault panel without worrying about cascading failures. The ETU550 electronic trip unit gives you adjustable long-time delay (0.5 s to 25 s) and N-conductor protection that can be set from off to 160% — useful for coordinating with downstream feeders in a cement plant or heavy industrial distribution board where the ambient is cooking and the dust is constant. Rated insulation voltage is 800 V, and the front face carries IP40 protection — sealed against tools and fingers, not against hose-down, so mount it inside a panel that handles the grit. Communication function is built in, which means it can talk to a higher-level control system for power monitoring or remote trip indication without an add-on module. The latching endurance is rated at 20,000 operations, and maximum power loss is 5.4 W — low enough that a standard steel enclosure doesn't need forced ventilation just for this breaker.
Dimensions and panel fit
The breaker measures 140 mm wide, 181 mm high, and 86 mm deep. That 86 mm depth is the body only — account for the handle throw and any communication wiring in the panel layout. It's a standard SENTRON 3VA footprint, so if you're swapping into an existing panel that was laid out for a 3VA frame, the mounting holes and bus connections should align without re-drilling.
Operating environment and compliance
Operating temperature range is -40 °C to 70 °C, with storage from -40 °C to 80 °C. That covers everything from a cold start in an unheated substation to the heat-soak next to a kiln or furnace. The part carries the usual Siemens compliance documentation for RoHS, REACH, UL, and IEC — available on request with the RFQ.