TeSys GS Switch-Disconnector-Fuse, 160 A Frame
The GS1LD4 is a 4-pole switch-disconnector-fuse from the Schneider TeSys GS series, rated for 160 A at 400 V in AC-23A and AC-23B duty. It switches and protects motor branch circuits up to 90 kW at 400 V, 110 kW at 500 V, or 110 kW at 690 V. The direct right-side operating handle gives a clear visual break indication — no ambiguity on whether the circuit is isolated. This is a fuse-protected disconnector, not a circuit breaker — the short-circuit protection comes from the upstream or integral fuse set (DIN-type, fuse size 0). The making capacity is 1600 A at 400 V AC-23B, and the breaking capacity is 1280 A at 400 V AC-23B. For a panel builder, that means the unit is sized for motor starting duty where the inrush is high but the fault interruption is handled by the fuse.
Ratings That Decide the Fit
The headline 160 A at 400 V AC-23A/B is the operational current with a terminal cover fitted. Without the cover, the thermal current (Ith) is the same 160 A at 40 °C ambient. The 125 A rating at 690 V AC-23A/B with terminal cover is the ceiling for higher-voltage installations — if your line runs at 690 V, budget for the lower ampacity. Short-circuit withstand is 20 kA, and the rated short-circuit making capacity (Icm) is 100 kA at 400 V when protected by gG fuses. That 100 kA making capacity means the switch can close onto a fault without welding contacts — critical for safety in high-fault-current panels. The impulse withstand voltage (Uimp) is 8 kV, which covers most industrial distribution networks. Electrical durability is 1000 cycles under AC-23A or AC-23B, and 200 cycles under DC-23A or DC-23B. Mechanical durability is 10,000 cycles. For a switch-disconnector used as a manual line isolator — cycled a few times per shift — that electrical endurance is adequate. For a part that sees daily switching under load, the 1000-cycle figure is the limit to track.
Mounting, Termination, and Environment
Mounts to a plate — not DIN rail — so plan for a backplate or sub-panel with the 242 mm width, 162 mm height, and 136.5 mm depth. The power circuit terminates via bars or lugs/ring terminals accepting 50–95 mm² flexible cable, torqued to 12 N·m (106.2 lbf·in). That lug range covers most motor feeder sizes up to the 160 A frame. IP20 with the terminal cover fitted — finger-safe but not washdown-rated. The operating temperature range is -20 °C to +70 °C, with storage from -40 °C to +80 °C. The fuse cover passes 850 °C glow-wire (IEC 60695-2-1) and the body passes 960 °C — relevant for panel certification to IEC 60947-3.
Sourcing and Lifecycle
The part carries IEC 60947-3 certification and is classified under Schneider's World Service Parts category for control access. For compliance documentation (RoHS, REACH, UL), the manufacturer's product compliance portal provides the declarations tied to this order code.