What the ratings mean for fit
The 3VA2225-5HN32-0KF0: The Icu=55kA @ 415V is the ultimate short-circuit breaking capacity — the breaker can safely interrupt a fault up to 55 kA once and still carry rated current afterward. For most industrial panel applications fed from a 415 V transformer, that covers the available fault current at the main distribution board. The ETU350 LSI trip gives you separate adjustments for long-time (overload), short-time (short-circuit with intentional delay), and instantaneous (high fault) protection, so you can coordinate selectively with downstream breakers. The shunt trip allows remote tripping from an E-stop or fire-alarm relay; the auxiliary and alarm switches provide status feedback to a PLC or annunciator panel.
Deployment context
This breaker mounts on a DIN rail or panel base inside a standard industrial enclosure. The 250 A frame and 55 kA rating suit it for main feeder or large motor branch protection in 415 V three-phase systems — common in pump stations, conveyor lines, and compressor skids. The shunt trip and auxiliary switches are wired back to the control circuit; verify the shunt trip coil voltage matches your control supply (208–277 V AC).