The SENTRON 3VA2163-6HL36-0AB0 is a 3-pole molded case circuit breaker rated 63 A continuous with an adjustable thermal-magnetic trip covering 95 A to 756 A. Breaking capacity sits at 242 kA at 240 V, drops to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3.7 kA at 690 V. That's unusual for a molded case; most breakers start knocking current down above 40 °C. If your panel runs hot, this one doesn't force a upsizing.
No surprise on the gland plate. Power loss is 4 W maximum.
