It accepts DIN-style fuse links in size 000, making it a straightforward line-side disconnect and short-circuit protection device for motor feeders and distribution sub-circuits. Rated operational current is 63 A across AC-23A and AC-23B duty at 400 V, 500 V, and 690 V — the AC-23 category covers motor loads with occasional overloads, so this switch handles starting inrush without nuisance opening. Breaking capacity is 500 A at 400 V (AC-23B); making capacity is 630 A at the same voltage, which means it can close onto a faulted circuit up to that peak. Rated operational power reaches 30 kW at 400 V, 40 kW at 500 V, and 55 kW at 690 V — match these to your motor nameplate to confirm the switch is sized for the load.
Mounts to a plate (not DIN rail), so plan for a drilled backplate or a sub-panel. The 4-pole footprint is 168 mm wide × 118 mm high × 116.5 mm deep — compact enough for a motor control centre bucket. Power-circuit terminals accept lugs or ring terminals from 10 to 25 mm²; tighten to 3.2 N·m. The operating handle can be mounted externally on the front or the right side — useful when the switch lives deep inside an enclosure and you need the handle on the door.