What the 160 A rating means for your load circuit
The GS1LD3 is a 3-pole switch-disconnector-fuse from the TeSys GS family, rated 160 A at 400 V in AC-23B duty — that's the category for switching motor loads and other moderately inductive circuits, not just resistive heater banks. At 690 V with the terminal cover fitted, the same 125 A rating applies, so the cover is mandatory for the full voltage rating. The breaking capacity hits 1280 A at 400 V AC-23B, and the making capacity is 1600 A at the same voltage — these numbers tell you the switch can close onto and interrupt motor inrush without welding the contacts. For fault-level coordination, the short-circuit withstand is 20 kA, and with upstream gG fuses the rated short-circuit making capacity reaches 100 kA at 400 V.
Mounting, wiring, and environmental limits
Mounts to a plate — not DIN rail — so plan for a drilled backplate in the enclosure. The power circuit terminates via bars or lugs/ring terminals accepting 50 to 95 mm² flexible cable, torqued to 12 N·m. The direct right-side operating handle gives a clear visual indication of contact position without linkage slack. IP20 with the terminal cover fitted means finger-safe but not washdown-rated — keep it inside a locked panel. Operating ambient spans -20 to 70 °C, storage from -40 to 80 °C. The TH protective treatment adds tropicalisation for humid environments. Dimensions are 162 mm high, 192 mm wide, 136.5 mm deep — the depth is the critical clearance behind the panel for the handle throw and cable bend radius.
Durability and compliance for the BOM
Rated for 1000 electrical cycles in AC-23A and AC-23B, and 200 cycles in DC-23A and DC-23B — the DC rating is notably lower because DC arcs are harder to extinguish. Mechanical durability is 10,000 cycles, so the switch outlasts the electrical life in most motor-switching applications. Built to IEC 60947-3, the standard for disconnect switches. Fire resistance is tested to 850 °C on the fuse cover and 960 °C on the body per IEC 60695-2-1. Rated insulation voltage is 750 V AC, with an impulse withstand of 8 kV — sufficient for 400 V and 690 V distribution panels.