The 3-pole design and 800 V rated insulation voltage suit it for 400/480 VAC three-phase feeder circuits where the interrupting rating is the binding constraint.
Breaking capacity across system voltages
The interrupting rating varies with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 480 V panel with a 25 kA available fault current, this breaker provides headroom; at 690 V the 11.9 kA rating is the limit to verify against the utility's service fault level.
