Circuit breaker 3VA2225-5KP32-0JD0 — IEC frame 250, class M breaking capacity
The Siemens 3VA2225-5KP32-0JD0 is a 3-pole IEC frame 250 molded case circuit breaker (MCCB) with a class M breaking capacity of Icu=55kA at 415V AC. That rating means it can safely interrupt fault currents up to 55kA without external fuses or cascading upstream — a key selectivity figure for main or feeder breakers in 400V industrial distribution boards. The ETU850 electronic trip unit provides LSI protection: long-time (Ir) adjustable 100A to 250A, short-time (Isd) 0.6 to 10x In, and instantaneous (Ii) 1.5 to 10x In. The Ir range lets you dial in the exact overload pickup for the downstream load, while the Isd and Ii bands give coordination headroom for motor-starting inrush or transformer magnetizing current.
Integration and accessory fit
This breaker ships with a shunt trip (left-side, 110-127V AC 50/60Hz/DC) and three auxiliary switches factory-fitted — the shunt trip allows remote emergency-off or undervoltage release, and the auxiliary switches provide status feedback to a PLC or SCADA. The N-conductor protection option requires an external current transformer, up to 160% of In. Mounts in a standard Siemens 3VA2 panelboard or individual enclosure; the frame 250 footprint matches the 3VA2 family, so busbar and handle-mechanism accessories are shared across the series.