The GS2NG4 is a TeSys GS switch-disconnector-fuse from Schneider Electric, designed for 4-pole isolation and protection of motor and power circuits up to 250 A in AC-23 duty (AC-23A and AC-23B at 400 V, 500 V, and 690 V). It accepts DIN-type fuse links, size 1, and is rated for breaking 2000 A at 400 V (AC-23B) with a making capacity of 2500 A at the same voltage. The part is built to IEC 60947-3, the standard for switch-disconnectors and fuse-combination units.
The 40 kA short-circuit withstand rating tells you the switch can survive a fault of that magnitude when protected by the correct upstream fuse, which matters for panel SCCR coordination. Rated operational power goes up to 132 kW at 400 V, 160 kW at 500 V, and 220 kW at 690 V — these are the motor sizes this switch can handle in AC-23 service, which covers motors with occasional overloads (like conveyors and pumps). The 8 kV rated impulse withstand voltage (Uimp) confirms it can handle typical transient surges in industrial distribution. IP20 with the terminal cover fitted means finger-safe but not protected against moisture — this is a panel-interior part, not for washdown or outdoor mounting. The operating handle mounts on the external left side, which affects enclosure cutout layout.
Plate-mount only — no DIN-rail clip on this frame. The 294 mm width, 195 mm height, and 146 mm depth need to be accounted for in the enclosure layout, especially the handle swing on the left side. Power circuit terminals accept bars up to 32 mm² or lugs/ring terminals from 95 to 240 mm², torqued to 25 N·m — substantial cable sizes for the 250 A rating.