The ETU550 electronic trip unit gives adjustable long-time, short-time, and instantaneous protection curves, plus ground-fault alarm or trip if you add the optional module. The shunt trip (STL) and two HQ auxiliary switches are factory-fitted, so the breaker arrives ready for remote tripping and status feedback — no field-wiring extra blocks.
The 3VA2225-6JP32-0HC0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA2 frame that drops into most existing MCC buckets or panel cutouts without re-drilling. The 86 mm depth leaves clearance for rear-mounted busbars or wiring troughs in a 400 mm deep enclosure.