What it is and what the ratings mean
The Siemens 3VA1163-4ED36-0KF0 is a 3-pole IEC frame 160 molded-case circuit breaker in the 3VA1 series, with a 63 A fixed thermal-magnetic overload release (Ir = 63 A) and a fixed short-circuit release set at 10 × In (630 A). The breaking capacity class S delivers 36 kA at 415 V AC — that is the maximum fault current it can safely interrupt without damage, which governs its suitability for high-fault-capacity distribution panels and motor branch circuits where the prospective short-circuit current is known to be at or below that level.
Deployment context
This breaker mounts on a DIN rail or panel base inside an industrial enclosure. The clamp-type terminals accept copper or aluminum conductors up to the rated cross-section for the 63 A frame, and the integrated shunt trip (left-side, 208–277 V AC / 220–250 V DC) allows remote tripping from an emergency-stop circuit or a PLC output — a common requirement in conveyor and pump panels where the breaker doubles as a disconnect under remote supervision.