The Siemens SENTRON 3VA2163-6KQ36-0AA0 is a 3-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 70 °C, which simplifies panel sizing in warm enclosures. Breaking capacity hits 242 kA at 240 V and 187 kA at 415/440 V, dropping to 121 kA at 500 V and 3.7 kA at 690 V — that 242 kA figure at 240 V covers high-fault utility feeds and transformer secondaries where fault current can exceed 200 kA.
Maximum power loss is 4 W, which keeps heat dissipation low in a sealed enclosure. Communication function is built in — this variant includes a communication interface for remote monitoring or trip-event reporting, though the specific protocol is not detailed in this listing.