{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GS1TB4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"GS1TB4","canonicalUrl":"https://aoctrl.com/schneider/GS1TB4","factsUrl":"https://aoctrl.com/api/mcp/products/GS1TB4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys GS GS1TB4 fuse switch disconnector body, 3 poles + N, BS fuse type, 800 A rated operational current, 450 kW at 400 V AC-23A.","salesMarkdown":"## What the GS1TB4 Is and Where It Fits The GS1TB4 is the body of a TeSys GS fuse switch disconnector — a 3-pole-plus-neutral unit that takes BS-type fuses and switches motor loads up to 800 A at 400 V in AC-23B duty. The 800 A figure is the rated operational current at 400 V in AC-23A and AC-23B service; at 690 V it derates to 630 A. That derating matters if your line runs at higher voltage — the switch's thermal capacity, not the fuse holder, is the limit. Breaking capacity is 6400 A at 400 V AC-23B; making capacity is 8000 A at the same condition. These numbers tell you the switch can close onto and interrupt fault currents up to those levels — relevant for coordination studies in a panel feeding a motor control centre. ## Mounting, Connections, and Panel Fit Mounts on a plate or DIN rail. The body dimensions are 19.7 in wide by 12.6 in high by 10.6 in deep — that 19.7-inch width means it spans most of a standard 24-inch panel depth, so plan the backplate layout accordingly. Power circuit connections accept bars or screw terminals up to 2 x 300 mm² flexible. Tightening torque for the bar connections is 389.4 lbf·in (44 N·m) — a torque wrench is expected, not optional. The operating handle mounts externally, either frontal or right-side. ## Standards, Protection, and Durability Designed to IEC 60947-3 (switch-disconnector standard) and IEC 60269-1/-2 (fuse standards). The body carries IP20 with the terminal cover fitted — finger-safe, but not washdown-rated. Fire resistance is 1760 °F (960 °C) for the body and 1562 °F (850 °C) for the fuse cover per IEC 60695-2-1. Mechanical durability is rated at 8000 cycles; electrical durability varies by duty — 500 cycles in AC-23A or AC-23B, 100 cycles in DC-23A or DC-23B. Ambient operating range is -4 to 158 °F (-20 to 70 °C). For a fuse switch that sits in a panel near a hot MCC bucket, the 70 °C ceiling is the one to check against your enclosure's internal temperature rise.","metaTitle":"Schneider GS1TB4 TeSys GS Fuse Switch Disconnector, 800 A","metaDescription":"Schneider GS1TB4 TeSys GS fuse switch disconnector body, 800 A rated, 3P+N, BS fuse type, IP20. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"10.6 in (268 mm)","Width":"19.7 in (501.5 mm)","title":"GS1TB4","Height":"12.6 in (320 mm)","Category":"18402-WORLD SERVICE PARTS(CONTROL ACCESS)","Fuse size":"C3 C2 C1","Fuse type":"BS","Standards":"IEC 60947-3 IEC 60269-2 IEC 60269-1","description":"switch-disconnector fuse body GS1 3 poles+N - BS - 800 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":"8000 A 400 V AC-23B","lifecycle_stage":"current","Mounting Support":"Plate Rail","Range of Product":"TeSys GS","Breaking capacity":"6400 A 400 V AC-23B)","Device short name":"GS1T","Network Frequency":"50/60 Hz","Poles description":"3P + N","Tightening torque":"Power circuit 389.4 lbf.in (44 N.m) bars Control circuit 389.4 lbf.in (44 N.m) bars","Protective treatment":"TH","Electrical durability":"100 cycles DC-23A 100 cycles DC-23B 500 cycles AC-23A 500 cycles AC-23B","Mechanical durability":"8000 cycles","Connections - terminals":"Power circuit bars Power circuit screw terminals 2 0.5 in² (300 mm²) flexible Power circuit screw terminals 2 0.3 in² (185 mm²) flexible","IP degree of protection":"IP20 IEC 60529 with terminal cover)","Type of operating handle":"External frontal External right side","Product or Component Type":"Fuse switch disconnector body","Rated operational power in W":"450 kW 400 V AC-23A) 450 kW 400 V AC-23B) 450 kW 500 V AC-23A) 450 kW 500 V AC-23B) 600 kW 690 V AC-23A) 600 kW 690 V AC-23B) 750 kW 690 V AC-23A) 750 kW 690 V AC-23B)","[Ui] rated insulation voltage":"1000 V AC 50/60 Hz","[Ie] rated operational current":"630 A 500 V AC-23A 630 A 500 V AC-23B 630 A 690 V AC-23A 630 A 690 V AC-23B 800 A 400 V AC-23A 800 A 400 V AC-23B 800 A 440 V 2 poles in series per phase DC-23A 800 A 440 V 2 poles in series per phase DC-23B","Ambient Air Temperature for Operation":"-4...158 °F (-20...70 °C)","[Uimp] rated impulse withstand voltage":"12 kV","[Icm] rated short-circuit making capacity":"800 kA 400 V with protection by BS fuses 800 kA rating of associated fuses","[Ith] conventional free air thermal current":"800 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/ie/en/product/GS1TB4/switchdisconnector-fuse-body-gs1-3-poles+n-bs-800-a/"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/GS1TB4","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/GS1TB4 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}}