{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"GS1KG4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"GS1KG4","canonicalUrl":"https://aoctrl.com/schneider/GS1KG4","factsUrl":"https://aoctrl.com/api/mcp/products/GS1KG4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys GS fuse switch disconnector body, GS1KG4, 4 poles, NFC fuse type, 22 x 58 mm fuse size, 125 A rated current.","salesMarkdown":"It carries a rated operational current of 125 A at 400 V AC-23A/AC-23B, and a breaking capacity of 1000 A at 400 V AC-23B. That AC-23B duty class means it's rated for switching motor loads and other highly inductive circuits — not just resistive heating — so it's a fit for motor branch circuits in panel builds. The 125 A conventional free-air thermal current (Ith) at 40 °C is the baseline for continuous current in open air; the AC-23A/AC-23B ratings at 400 V, 500 V, and 690 V define how much motor load it can switch at each voltage. The making capacity of 1250 A at 400 V AC-23B covers the inrush when closing onto a fault. It complies with IEC 60947-3 (switch-disconnector standard) and IEC 60269-2/1 (fuse standards), which is the baseline for industrial control panels in most markets. The 8 kV rated impulse withstand voltage (Uimp) gives it a solid margin for surge environments in industrial power distribution. Mounting is on a rail or plate, and the external left-side handle operation suits panel layouts where the handle needs to protrude through a door cutout.","metaTitle":"GS1KG4 TeSys GS fuse switch disconnector, 125 A, 4P, NFC","metaDescription":"GS1KG4 TeSys GS fuse switch disconnector body, 4 poles, 125 A rated current, 1000 A breaking capacity at 400 V AC-23B. Active, sourced to order. RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"title":"GS1KG4","Category":"18402-WORLD SERVICE PARTS(CONTROL ACCESS)","Fuse size":"22 x 58 mm","Fuse type":"NFC","Standards":"IEC 60947-3 IEC 60269-2 IEC 60269-1","description":"switch-disconnector fuse body GS1 - TeSys GS - 4 poles - NFC - 125 A","Network type":"AC DC","Fire resistance":"1562 °F (850 °C) fuse cover IEC 60695-2-1 1760 °F (960 °C) body IEC 60695-2-1","Making capacity":"1250 A 400 V AC-23B","lifecycle_stage":"current","Mounting Support":"Rail Plate","Breaking capacity":"1000 A 400 V AC-23B)","Device short name":"GS1 K","Network Frequency":"50/60 Hz","Poles description":"4P","Tightening torque":"Power circuit 106.2 lbf.in (12 N.m) bars Power circuit 106.2 lbf.in (12 N.m) screw terminals","Protective treatment":"TH","Electrical durability":"1000 cycles AC-23A 1000 cycles AC-23B","Mechanical durability":"10000 cycles","Connections - terminals":"Power circuit bars Power circuit screw terminals 0.05...0.1 in² (35...95 mm²) flexible","IP degree of protection":"IP20 IEC 60529 with terminal cover)","Type of operating handle":"External left side","Product or Component Type":"Fuse switch disconnector body","Rated operational power in W":"690 V AC-23A) 690 V AC-23B) 400 V AC-23A) 400 V AC-23B) 500 V AC-23A) 500 V AC-23B)","[Ui] rated insulation voltage":"750 V AC 50/60 Hz","[Ie] rated operational current":"100 A 440 V 2 poles in series per phase DC-23A 100 A 440 V 2 poles in series per phase DC-23B 100 A 690 V with terminal cover AC-23A 100 A 690 V with terminal cover AC-23B 125 A 400 V AC-23A 125 A 400 V AC-23B 125 A 500 V AC-23A 125 A 500 V AC-23B","[Uimp] rated impulse withstand voltage":"8 kV","[Icm] rated short-circuit making capacity":"100 kA 400 V with protection by gG (gI) fuses 125 kA rating of associated fuses","[Ith] conventional free air thermal current":"125 A (at 104 °F (40 °C))"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e944cdcaed2f6ab07ef8aa3dd11a2322.pdf","sourceUrl":"https://www.se.com/ng/en/product/GS1KG4/switchdisconnector-fuse-body-gs1-tesys-gs-4-poles-nfc-125-a/"},"ai":{"faq":[{"question":"What fuse size and type does the GS1KG4 accept?","answer":"It accepts NFC-type fuses in the 22 x 58 mm size."},{"question":"What are the key ratings for the GS1KG4?","answer":"Rated operational current 125 A at 400 V AC-23A/AC-23B, breaking capacity 1000 A at 400 V AC-23B, making capacity 1250 A at 400 V AC-23B, rated impulse withstand voltage 8 kV. It is a 4-pole device."},{"question":"What standards does the GS1KG4 comply with?","answer":"It complies with IEC 60947-3, IEC 60269-2, and IEC 60269-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/GS1KG4","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/GS1KG4 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}}