{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C125N4FM","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C125N4FM","canonicalUrl":"https://aoctrl.com/schneider/C125N4FM","factsUrl":"https://aoctrl.com/api/mcp/products/C125N4FM","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NS1250N new generation, basic frame C125N4FM, 1250 A at 50 °C, 4P, fixed, manually operated, without control unit, 50 kA Icu at 415 V AC.","salesMarkdown":"## What this frame is and where it sits The Schneider Electric C125N4FM is a basic frame from the ComPacT NS630b...1600 new generation range — a 4-pole, manually operated air circuit breaker frame rated 1250 A at 50 °C, designed for fixed backplate mounting. It carries an N breaking capacity code: 50 kA Icu at 415 V AC, 50/60 Hz, certified to IEC 60947-2. This is the bare frame without a control unit or protection module; you add the trip unit separately to define the protection curve. Impulse withstand (Uimp) is 8 kV, which covers overvoltage category III installations. The integral instant protection is set at 40 kA, a fixed magnetic threshold that acts as backup protection if the trip unit fails. ## Physical integration and panel fit Fixed backplate mounting, 4-pole, neutral on the left. Dimensions: 280 mm wide, 224 mm high, 147 mm deep. Connection pitch is 70 mm — standard for busbar or cable lug termination at this frame size. Power losses are 44 W at rated current, which factors into enclosure ventilation sizing. Mechanical durability is 10,000 cycles; electrical durability varies by voltage and current — 2,000 cycles at 690 V AC at In, up to 5,000 cycles at 440 V AC at In/2. Storage temperature range -50 to 85 °C; operating -25 to 70 °C.","metaTitle":"Schneider Electric C125N4FM ComPacT NS1250N, 1250A, 4P, 50kA","metaDescription":"Circuit breaker frame, ComPacT NS1250N, 1250A, 4P, fixed, manually operated, without control unit. 50 kA Icu at 415 VAC. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Range":"ComPacT","Depth (D)":"147 mm","Standards":"IEC 60947-2","Width (W)":"280 mm","Height (H)":"224 mm","Control type":"Manually operated","Network type":"AC","Power losses":"44 W","Mounting mode":"Fixed","Number of poles":"4P","Protection type":"Without protection","lifecycle_stage":"current","Connection pitch":"70 mm","Mounting support":"Backplate","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947","Range of product":"ComPacT NS630b...1600 new generation","Breaking capacity":"85 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 40 kA Icu at 500/525 V AC 50/60 Hz conforming to IEC 60947-2 30 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2","Network frequency":"50/60 Hz","Device application":"Distribution","[In] rated current":"1250 A at 50 °C","Overvoltage category":"III","Utilisation category":"Category B","Electrical durability":"2000 cycles 690 V AC 50/60 Hz In conforming to IEC 60947-2 3000 cycles 690 V AC 50/60 Hz In/2 conforming to IEC 60947-2 4000 cycles 440 V AC 50/60 Hz In conforming to IEC 60947-2 5000 cycles 440 V AC 50/60 Hz In/2 conforming to IEC 60947-2","Mechanical durability":"10000 cycles conforming to IEC 60947-2","Breaking capacity code":"N 50 kA 415 V AC","IK degree of protection":"IK07 conforming to EN 50102","IP degree of protection":"IP40 conforming to IEC 60529","Product or component type":"Basic frame","Suitability for isolation":"Yes conforming to EN/IEC 60947-2","Integral instant protection":"40 kA","[Ui] rated insulation voltage":"800 V AC 50/60 Hz conforming to IEC 60947-2","[Ue] rated operational voltage":"690 V AC 50/60 Hz","Electrical shock protection class":"Class II on front face","Ambient air temperature for storage":"-50...85 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"50 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 40 kA at 500/525 V AC 50/60 Hz conforming to IEC 60947-2 30 kA at 660/690 V AC 50/60 Hz conforming to IEC 60947-2","[Uimp] rated impulse withstand voltage":"8 kV conforming to IEC 60947-2","[Icw] rated short-time withstand current":"19.2 kA 1 s conforming to IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,951.10 – $3,265.79","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f47185090f428be98565e053ca5cff7f.pdf","sourceUrl":"https://www.se.com/ie/en/product/C125N4FM/circuit-breaker-frame-compact-ns1250n-50ka-at-415vac-1250a-4p-fixed-manually-operated-without-control-unit/","alternativesUrl":"https://aoctrl.com/api/mcp/products/C125N4FM/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy C125N4FM and how do I get a price?","answer":"This frame is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the closest alternative to C125N4FM in the ComPacT family?","answer":"Within the same ComPacT NS630b...1600 new generation range, the closest alternative would be a frame with a different breaking capacity code (e.g., S, H, or L) or a different rated current. The C125N4FM is the N-code 1250 A 4P basic frame; if you need a higher interrupting rating, step to the H or L code. No pin-compatible drop-in exists — the trip unit and accessories are shared across the range, but the frame's breaking capacity is fixed by its code."},{"question":"What compliance documentation does Schneider provide for C125N4FM?","answer":"The frame is certified to IEC 60947-2, with suitability for isolation per EN/IEC 60947-2. Pollution degree 3, overvoltage category III, and electrical shock protection Class II on the front face. IK07 impact and IP40 enclosure ratings apply. Standard Schneider documentation includes the declaration of conformity and the IEC certificate; RoHS and REACH compliance is standard for the ComPacT NS new generation range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C125N4FM","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/C125N4FM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}