The Siemens SENTRON 3VA2163-6HL32-0JC0 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 that ceiling. Breaking capacity hits 242 kA at 240 V AC, drops to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3.7 kA at 690 V. This is a line-protection design (not motor-protection), so it's meant for feeder and main breaker duty in distribution panels. The shunt trip (STL) and two HQ auxiliary switches are built in — no separate add-on modules needed for remote trip or status feedback.
Power loss is 4 W maximum at rated load, so heat buildup in a sealed enclosure is minimal.
