The N breaking capacity code means this is the standard interrupting level in the EasyPact EZC400 family. The 4-pole configuration with no neutral protection (solid neutral) suits three-phase distribution where you need the fourth pole for switching but not overcurrent protection on the neutral conductor. Mounts fixed to a backplate with front-facing connections, sized for distribution panels where the 140 mm width and 255 mm height fit a standard MCCB cutout.
Trip unit and protection logic
The 3500 A magnetic pickup (about 8.75× In) is a fixed setting, not adjustable. That means this breaker is suited for distribution loads without high inrush (lighting, small transformers, resistive banks) rather than motor circuits where a higher magnetic pickup or adjustable trip is needed.
Electrical endurance is 4000 cycles at 415 V (Category A), mechanical endurance 10,000 cycles. That's typical for a distribution MCCB — not for frequent switching duty. The positive contact indication on the toggle gives a visual confirmation of the contact position, which helps during panel walkdowns and lockout/tagout verification.