63 A MCCB with ETU550 — what the ratings mean for fit
The Siemens SENTRON 3VA2063-6JP36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at ambient temperatures from 40 °C through 70 °C — no derating needed across that range, which simplifies panel design in warm enclosures. The ETU550 electronic trip unit provides adjustable overload and short-circuit protection curves, making it suitable for line protection in distribution panels where coordination with downstream breakers matters.
Breaking capacity — selectivity headroom
At 240 V the interrupting rating is 242 kA; at 415 V and 440 V it holds at 187 kA, and at 500 V it still delivers 121 kA. Only at 690 V does it drop to 3 kA, so for 400 V class systems this breaker gives substantial fault-current headroom for selective coordination upstream of a transformer or main switchboard.
Panel integration and dimensions
The 3VA2063-6JP36-0AA0 measures 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party enclosures with a 105 mm wide mounting cutout. Front IP40 protection means it is suited for indoor panel installation where dust ingress is limited.