The Siemens SENTRON 3VA2163-7MS32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It's designed specifically for starter protection, meaning it's built to coordinate with motor contactors and overload relays in a motor branch circuit, not just as a feeder breaker.
Interrupting capacity — the real number that matters
At 240 V this MCCB can interrupt 330 kA of fault current. That drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V.
The 86 mm depth means it clears most shallow enclosures, but check the handle throw arc if you're fitting a door interlock.
Auxiliaries and release options
The basic switch is order code 3VA2163-7MS32-0AA0 if you ever need to swap the switching mechanism as a subassembly.