The Siemens 3VA1063-3ED32-0CA0 is a 3-pole IEC frame 100 circuit breaker rated for 63 A continuous current with a fixed thermal-magnetic trip unit (TM210). Its breaking capacity hits 25 kA at 415 V AC — class N, which covers most commercial and light industrial distribution panels where fault currents stay under that threshold. The built-in undervoltage release (UVR) operates on 120-127 V AC, so it drops the breaker if control voltage is lost, a common requirement for safety disconnects on conveyor or machine-tool feeds.
What the ratings mean for fit
The 63 A fixed overload protection (Ir = 63 A) and fixed short-circuit protection set at 10 x In (Ii = 630 A) mean this breaker is pre-configured for a specific load — no field-adjustable dials. That suits a design where the load current is known and stable, like a fixed-speed pump or a lighting distribution board. The 25 kA Icu at 415 V AC tells you it can safely interrupt a fault up to that level without welding contacts or cascading upstream; coordination with a downstream MCCB or fuse needs to respect that limit.
Panel integration notes
Mounts on standard DIN rail inside an enclosure. The nut keeper kit (included per the order code) holds the terminal screws captive during wiring — a small detail that saves time on a panel build. The UVR coil draws from a 120-127 V AC control circuit; verify the control transformer taps match before energizing.