{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GS1LB4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"GS1LB4","canonicalUrl":"https://aoctrl.com/schneider/GS1LB4","factsUrl":"https://aoctrl.com/api/mcp/products/GS1LB4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys GS GS1LB4 fuse switch disconnector body, 4 poles, BS fuse type, 160 A, 400 V AC, IP20 with terminal cover, plate or rail mount.","salesMarkdown":"## What the 160 A rating means for your panel The GS1LB4 is a TeSys GS fuse switch disconnector body — the guts of a 4-pole, BS-type fused disconnect. It carries a conventional free air thermal current (Ith) of 160 A at 40 °C, which is the continuous current the body can handle in open air without a terminal cover. In real-world panel duty with the terminal cover fitted, the rated operational current (Ie) is 160 A at 400 V and 500 V in AC-23A and AC-23B categories, and 125 A at 690 V AC-23A/AC-23B. The AC-23B rating covers occasional switching of motor loads with inrush — so this body is sized for 160 A motor feeders on 400 V systems where you need a BS fuse carrier. Rated operational power hits 80 kW at 400 V and 110 kW at 500 V or 690 V in AC-23A/AC-23B duty — the higher voltage unlocks the full power capability. If your motor is 75 kW at 400 V, this body has headroom. ## Breaking capacity and fault handling The GS1LB4 is a fuse switch disconnector — it depends on the BS fuses for fault interruption. The body itself is rated for a breaking capacity of 1280 A at 400 V AC-23B and a making capacity of 1600 A at 400 V AC-23B. That making capacity is what the switch contacts can close onto without welding during a fault. Short-circuit withstand rating is 80 kA — that's the prospective fault current the body can survive when backed by appropriately rated BS fuses. The rated short-circuit making capacity (Icm) is 160 kA at 400 V with protection by BS fuses rated at 160 A. This is a robust assembly for high-fault-current industrial panels. Standards compliance covers IEC 60269-1, IEC 60947-3, and IEC 60269-2 — the fuse and switch-disconnector standards. That means the body is tested for coordination with BS fuses under fault conditions. ## Mounting, wiring, and environment Mounts on either a plate or a DIN rail — the TeSys GS family gives you that flexibility for panel layout. Dimensions are 9.4 in wide by 6.4 in tall by 4.8 in deep (240 x 162 x 123 mm), so plan for a 10-inch-wide backpanel bay. Power circuit terminals accept bars or screw terminals for 50 to 95 mm² flexible cable. Tightening torque is 12 N·m (106.2 lbf·in) for both control circuit screw terminals and power circuit bars — use a torque wrench; under-torquing on 95 mm² cable creates a hot spot. IP20 protection with the terminal cover fitted — finger-safe but not splash-proof. Operating temperature range is -20 to 70 °C, which covers most indoor panel environments. Fire resistance of the body is 960 °C and the fuse cover 850 °C per IEC 60695-2-1. ## Lifecycle and sourcing Electrical durability is 1000 cycles in AC-23A/AC-23B and 200 cycles in DC-23A/DC-23B. Mechanical durability is 10,000 cycles. For a fuse switch disconnector that's operated infrequently (maybe a few times a year for lockout/tagout), that's fine — but if you're cycling it daily as a motor switch, consider a contactor instead. Quoted to order against your BOM quantity. Availability and current pricing confirmed at RFQ — no stock-holding claim, but the active lifecycle means lead times are standard for the TeSys GS line.","metaTitle":"Schneider Electric GS1LB4 TeSys GS Fuse Switch Disconnector","metaDescription":"Schneider Electric GS1LB4 TeSys GS fuse switch disconnector body, 4 poles, BS type, rated 160 A at 400 V AC-23B. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"4.8 in (123 mm)","Width":"9.4 in (240 mm)","title":"GS1LB4","Height":"6.4 in (162 mm)","Category":"18402-WORLD SERVICE PARTS(CONTROL ACCESS)","Fuse size":"B2 B1","Fuse type":"BS","Standards":"IEC 60269-1 IEC 60947-3 IEC 60269-2","description":"switch-disconnector fuse body GS1 4 poles - BS - 160 A","Network type":"AC DC","Fire resistance":"1760 °F (960 °C) body IEC 60695-2-1 1562 °F (850 °C) fuse cover IEC 60695-2-1","Making capacity":"1600 A 400 V AC-23B","lifecycle_stage":"current","Mounting Support":"Plate Rail","Range of Product":"TeSys GS","Breaking capacity":"1280 A 400 V AC-23B)","Device short name":"GS1 L","Network Frequency":"50/60 Hz","Poles description":"4P","Tightening torque":"Control circuit 106.2 lbf.in (12 N.m) screw terminals Power circuit 106.2 lbf.in (12 N.m) bars","Protective treatment":"TH","Electrical durability":"1000 cycles AC-23A 1000 cycles AC-23B 200 cycles DC-23A 200 cycles DC-23B","Mechanical durability":"10000 cycles","Connections - terminals":"Power circuit bars Power circuit screw terminals 0.08...0.1 in² (50...95 mm²) flexible","IP degree of protection":"IP20 IEC 60529 with terminal cover)","Short-circuit withstand":"80 kA","Type of operating handle":"External frontal External right side","Product or Component Type":"Fuse switch disconnector body","Rated operational power in W":"110 kW 500 V AC-23A) 110 kW 500 V AC-23B) 110 kW 690 V AC-23A) 110 kW 690 V AC-23B) 80 kW 400 V AC-23A) 80 kW 400 V AC-23B)","[Ui] rated insulation voltage":"750 V AC 50/60 Hz","[Ie] rated operational current":"125 A 440 V 2 poles in series per phase DC-23A 125 A 440 V 2 poles in series per phase DC-23B 125 A 690 V with terminal cover AC-23A 125 A 690 V with terminal cover AC-23B 160 A 400 V AC-23A 160 A 400 V AC-23B 160 A 500 V AC-23A 160 A 500 V AC-23B","Ambient Air Temperature for Operation":"-4...158 °F (-20...70 °C)","[Uimp] rated impulse withstand voltage":"8 kV","[Icm] rated short-circuit making capacity":"160 kA 400 V with protection by BS fuses 160 kA rating of associated fuses","[Ith] conventional free air thermal current":"160 A (at 104 °F (40 °C))"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/vn/en/product/GS1LB4/switchdisconnector-fuse-body-gs1-4-poles-bs-160-a/"},"ai":{"faq":[{"question":"What is the GS1LB4's breaking capacity at 400 V AC-23B?","answer":"The GS1LB4 has a breaking capacity of 1280 A at 400 V in AC-23B duty and a making capacity of 1600 A at the same voltage and category. The short-circuit withstand rating is 80 kA when protected by appropriately rated BS fuses."},{"question":"What fuse type does the GS1LB4 accept?","answer":"The GS1LB4 is designed for BS-type fuses, sizes and. It is a 4-pole fuse switch disconnector body that requires BS fuses for overcurrent protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/GS1LB4","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/GS1LB4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}