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). Breaking capacity is 25 kA at 415 V (breaking capacity class N), which covers most industrial distribution panels and motor branch circuits where the prospective fault current stays under that level. The 24 V DC undervoltage release (UVR) trips the breaker when control voltage drops — a standard requirement for emergency-stop or safety-shutdown loops in process plants.
Ratings and what they mean for fit
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. The 25 kA Icu at 415 V is the ultimate breaking capacity; the breaker can interrupt one fault at that level and still be usable afterward (no replacement needed for a single event). 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. The UVR coil holds at 24 V DC nominal; if the control voltage drops below the dropout threshold (typically around 18 V for these coils), the breaker trips open. In a petrochemical SIS architecture, this UVR can be driven by a safety relay or DCS output to provide a failsafe on demand. Mounts on a DIN rail or panel-mount base; the 3VA1 frame width is 90 mm per pole, so a 3-pole unit occupies 270 mm of rail space.