The Siemens 3VA1063-3ED36-0BA0 is a 3-pole IEC molded-case circuit breaker in the 3VA1 frame, rated 63 A with a fixed thermal-magnetic trip unit (TM210).
The 63 A fixed overload protection (Ir) matches the continuous current of a feeder or a large motor circuit. Short-circuit protection is fixed at 10× In (630 A magnetic pickup), so it clears bolted faults fast but may nuisance-trip on high-inrush loads like transformers or long cable runs — check the inrush against 630 A before specifying. Class N means this is the standard-economy breaking tier in the 3VA family, adequate for most panelboard and sub-distribution applications where higher kA ratings (class S or H) aren't required by the utility transformer size.
Deployment context
The clamp connection terminals accept copper or aluminum conductors up to the frame's rated wire range — no lug kit needed for standard panel wiring. In a petrochemical SIS architecture, this UVR can be driven by a safety relay or DCS output to provide a failsafe on demand.