The GS1QQG3 is a TeSys GS fuse switch disconnector body — a 3-pole, DIN-rail or plate-mount unit rated for 400 A conventional free-air thermal current at 40 °C. In AC-23B duty, it makes 4000 A and breaks 3200 A at 400 V. For DC-23A/B, rated operational current is 200 A at 440 V with poles not juxtaposed, or 315 A at the same voltage if poles are separated. It meets IEC 60947-3 (switch-disconnector standard) plus IEC 60269-1 and IEC 60269-2 for fuse coordination. Fire resistance is specified at 850 °C for the fuse cover and 960 °C for the body, per IEC 60695-2-1.
The operating handle is on the external left side. Power circuit connections accept bars or screw terminals for 185 to 240 mm² flexible cable; tightening torque is 25 N·m on both bar and screw-terminal connections. With the terminal cover fitted, the IP20 rating protects against finger contact — standard for inside a locked panel.
This part is marked obsolete by the manufacturer. No direct successor is listed in the evidence.