The Siemens 3VA2225-7JP32-0AJ0 is an IEC frame 250 molded case circuit breaker with a class C breaking capacity of 110 kA at 415 VAC. It carries the ETU550 electronic trip unit configured for LSI protection — long-time (Ir adjustable 100–250 A), short-time (Isd 0.6–10x In), and instantaneous (Ii 1.5–10x In). The 3-pole unit ships with two auxiliary switch changeover contacts (H) and one trip alarm switch changeover, so it arrives panel-ready for status feedback and fault annunciation without a separate accessory order.
Mounts on a DIN rail or panel-mount base in the switchgear enclosure. The ETU550 trip unit is field-adjustable for Ir, Isd, and Ii, so the same breaker can be tuned to different feeder or branch-circuit loads during commissioning. Neutral conductor protection is optional via an external current transformer, up to 160% of In — a detail to note if the distribution system requires 4-pole protection with a switched neutral.