The Siemens 3VA2216-7JP32-0KF0 is a 3-pole IEC frame 250 molded case circuit breaker rated for 160 A continuous current, with a 110 kA interrupting capacity at 415 V AC — class C breaking capacity, meaning it clears high-fault currents typical in industrial distribution without cascading upstream. The ETU550 electronic trip unit provides LSI protection: long-time (overload) adjustable from 63 A to 160 A, short-time pickup from 0.6x to 10x In, and instantaneous pickup from 1.5x to 12x In. A factory-fitted shunt trip (left side, 208–277 V AC / 220–250 V DC) allows remote opening, and the accessory kit includes one changeover auxiliary switch and one trip alarm switch.
The ETU550 is powered by integral current transformers — no external control power needed for the trip unit itself. The shunt trip occupies the left accessory slot; the auxiliary and alarm switches fill the right-side positions. Neutral conductor protection is optional via an external current transformer (up to 160% of In).