The Siemens 3VM1225-5EE42-0AA0 is a 4-pole molded-case circuit breaker from the 3VM1 family, IEC frame 250, rated In=250A with a breaking capacity Icu=55kA at 415V AC (class M). Overload protection is set via the TM220 thermal-magnetic trip unit, adjustable Ir=175…250A; short-circuit pickup is fixed at Ii=10 x In. This is a current-production part (lifecycle status active). Because it falls under product class C — manufactured or produced to order — it is not a stocked shelf item; each unit is built against a confirmed order and is non-returnable. Plan your lead time accordingly.
The TM220 trip unit adjusts thermal overload Ir from 175 to 250 A. The fixed magnetic pickup at 10x In clears a hard short fast. The nut keeper kit simplifies mounting in a panel; the breaker fits standard Siemens 3VM1 accessories (busbar connectors, shunt trips, auxiliary contacts) if you need remote signaling or motor operation.