{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GS1LLB4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"GS1LLB4","canonicalUrl":"https://aoctrl.com/schneider/GS1LLB4","factsUrl":"https://aoctrl.com/api/mcp/products/GS1LLB4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys GS, fuse switch disconnector body, GS1LLB4, 4 poles, BS fuse size A4, 160 A rated operational current at 400 V AC-23B, 80 kW rated power.","salesMarkdown":"The GS1LLB4 is a TeSys GS fuse switch disconnector body — a 4-pole, 160 A rated unit that takes BS type A4 fuses. It's the disconnect and short-circuit protection point for a motor branch circuit or distribution feeder, not a contactor. The 160 A rating at 400 V under AC-23B duty (the heavy motor-switching category per IEC 60947-3) means it handles frequent motor starts and stops at full load, not just isolation. The making capacity of 1600 A and breaking capacity of 1280 A at 400 V AC-23B tell you it can close onto and interrupt a fault — that's the switch-disconnector's job when the fuses are sized for the circuit. The headline number is 160 A at 400 V AC-23B — that's the motor-switching current. But the same body also carries 125 A at 690 V AC-23A/B, so if your line voltage is higher, the current drops accordingly. The short-circuit withstand rating of 80 kA is the prospective fault current the body can survive when backed by the correct BS fuses — that's the coordination number your panel designer needs for SCCR. The 4-pole configuration (3 poles + neutral switched) is standard for three-phase distribution where you want to isolate the neutral. The BS fuse size A4 means the fuse-link dimensions follow the British Standard blade pattern — not DIN or NH. If your plant standardizes on BS fuses, this is the body. If you run DIN fuses, you need the GS1LU variant. The body is 240 mm wide, 162 mm high, 123 mm deep. That's a substantial footprint; plan your gland plate and busbar clearance accordingly. The power circuit connects via bars or screw terminals accepting 50 to 95 mm² flexible cable. Tightening torque is 12 N·m on both control and power terminals — use a torque wrench; under-torqued joints on a 160 A circuit generate heat. IP20 with the terminal cover fitted (IEC 60529) — finger-safe inside the enclosure, not for outdoor or washdown locations. The TH protective treatment means it's tropicalized against humidity and fungus — fine for non-air-conditioned plant floors. Designed and tested to IEC 60947-3 (switch-disconnectors) and IEC 60269-1/-2 (low-voltage fuses). The fire-resistance rating on the body is 960 °C per IEC 60695-2-1; the fuse cover is 850 °C. The rated impulse withstand voltage is 8 kV (Uimp), and the insulation voltage is 750 V AC. These are the numbers a quality doc controller needs for the declaration of conformity and the panel builder needs for the nameplate.","metaTitle":"Schneider TeSys GS1LLB4 Fuse Switch Disconnector, 160A, 4P","metaDescription":"Schneider Electric TeSys GS1LLB4 fuse switch disconnector body, 4 poles, 160 A rated current, BS fuse type A4. Active production. Sourced to order. IEC 60947-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"123 mm","Width":"240 mm","title":"GS1LLB4","Height":"162 mm","Fuse size":"A4","Fuse type":"BS","Standards":"IEC 60947-3 IEC 60269-1 IEC 60269-2","description":"switch-disconnector fuse body GS1 4 poles - BS - 160 A","Network type":"AC DC","Fire resistance":"960 °C body conforming to IEC 60695-2-1 850 °C fuse cover conforming to IEC 60695-2-1","Making capacity":"1600 A at 400 V AC-23B","lifecycle_stage":"current","Mounting support":"Plate Rail","Range of product":"TeSys GS","Breaking capacity":"1280 A at 400 V (AC-23B)","Device short name":"GS1 L","Network frequency":"50/60 Hz","Poles description":"4P","Tightening torque":"Control circuit: 12 N.m - on screw terminals Power circuit: 12 N.m - on 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 terminals50...95 mm² flexible","IP degree of protection":"IP20 conforming to IEC 60529 (with terminal cover)","Short-circuit withstand":"80 kA","Type of operating handle":"External right side External frontal","Product or component type":"Fuse switch disconnector body","Rated operational power in W":"110 kW at 500 V (AC-23A) 110 kW at 500 V (AC-23B) 110 kW at 690 V (AC-23A) 110 kW at 690 V (AC-23B) 80 kW at 400 V (AC-23A) 80 kW at 400 V (AC-23B)","[Ui] rated insulation voltage":"750 V AC 50/60 Hz","[Ie] rated operational current":"125 A at 440 V 2 poles in series per phase DC-23A 125 A at 440 V 2 poles in series per phase DC-23B 125 A at 690 V with terminal cover AC-23A 125 A at 690 V with terminal cover AC-23B 160 A at 400 V AC-23A 160 A at 400 V AC-23B 160 A at 500 V AC-23A 160 A at 500 V AC-23B","Ambient air temperature for operation":"-20...70 °C","[Uimp] rated impulse withstand voltage":"8 kV","[Icm] rated short-circuit making capacity":"160 kA at 400 V with protection by BS fuses 160 kA rating of associated fuses","[Ith] conventional free air thermal current":"160 A (at 40 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/ie/en/product/GS1LLB4/switchdisconnector-fuse-body-gs1-4-poles-bs-160-a/"},"ai":{"faq":[{"question":"What is the closest alternative to the GS1LLB4 in the TeSys GS range?","answer":"The closest sibling is the GS1LU4, which is the DIN fuse version of the same 4-pole, 160 A body. If your plant uses DIN fuses instead of BS fuses, that's the one. The GS1LLB4 is the BS fuse variant."},{"question":"What are the key dimensions of the GS1LLB4?","answer":"The GS1LLB4 has a width of 240 mm, a height of 162 mm, and a depth of 123 mm. These dimensions are important for panel layout and enclosure sizing."},{"question":"What standards does the GS1LLB4 comply with?","answer":"The GS1LLB4 complies with IEC 60947-3 for switch-disconnectors and IEC 60269-1 and IEC 60269-2 for low-voltage fuses. It also meets the fire-resistance requirements of IEC 60695-2-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/GS1LLB4","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/GS1LLB4 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}}