It carries an EKIP DIP LSIG electronic trip unit rated at 600 A, with L (long-time), S (short-time), I (instantaneous), and G (ground-fault) protection curves. The 3-pole FF configuration uses fixed front terminals, and the unit holds UL and CSA approvals for North American panel builds.
That makes the XT6NU3600GFF000XXX suitable for feeder or main breaker duty where coordination with downstream devices is required — the LSIG curves let you set selectivity margins against branch breakers. The 800 A frame means the breaker's thermal and magnetic capacity exceeds the 600 A trip rating, providing headroom for short-circuit interruption without damaging the trip unit. UL/CSA listing certifies it for North American service entrance and panelboard applications.
Deployment Context
The FF fixed-front terminal design suits it for switchboard or panelboard mounting where the breaker is bolted to a bus and the load cables land on the front lugs. No plug-in base or draw-out cradle — this is a fixed-mount unit for permanent installation. The 3-pole configuration handles three-phase power distribution in industrial and commercial switchgear up to 600 A continuous.