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. 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.
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
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.