{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C125N35AFM","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C125N35AFM","canonicalUrl":"https://aoctrl.com/schneider/C125N35AFM","factsUrl":"https://aoctrl.com/api/mcp/products/C125N35AFM","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NS new generation, C125N35AFM, 3P, 1250 A, 50 kA Icu at 415 V AC, MicroLogic 5.0 A electronic trip unit, LSI protection, fixed mount, IP40.","salesMarkdown":"The C125N35AFM is a 3-pole ComPacT NS new generation molded-case circuit breaker from Schneider Electric, rated 1250 A at 50 °C. That 1250 A figure is the trip-unit rating (In), not the frame rating — the breaker's continuous current capacity at the listed ambient. The MicroLogic 5.0 A electronic trip unit provides LSI protection: long-time (L) for overload, short-time (S) for selective short-circuit coordination, and instantaneous (I) for high-fault clearing. This is a distribution-grade breaker (EN/IEC 60947-2, utilization category B), meaning it's designed for main or feeder protection in low-voltage switchboards, not for direct motor starting. The breaking capacity is the headline selector: 85 kA Icu at 220/240 V AC, 50 kA at 380/415 V, 40 kA at 500/525 V, and 30 kA at 660/690 V. The 85 kA at 240 V matters for North American 277/480 V wye systems where the line-to-neutral fault current can be high. The Icu (ultimate breaking capacity) is the maximum fault the breaker can clear once; the Ics (service breaking capacity, not listed here but typically 50–100% of Icu per IEC 60947-2) governs how many operations it survives. For a main breaker where fault duty is known and coordination is designed, the Icu is the binding spec. The MicroLogic 5.0 A trip unit is electronic, not thermal-magnetic, so it offers adjustable long-time, short-time, and instantaneous pickups plus a thermal-memory function (20-minute reset time). That adjustability is what lets the commissioning engineer set selective coordination with downstream breakers — the short-time delay can be tuned to ride through inrush without nuisance tripping. The LCD display shows real-time current (ammeter function), and the four red LEDs indicate fault type (overload, short-circuit, etc.), which speeds troubleshooting on a live panel. Fixed-mount design on a backplate (not draw-out). Dimensions: 327 mm high, 210 mm wide, 147 mm deep. Front-connect both upstream and downstream — no rear-access required, which simplifies panel layout and busbar routing. IK07 impact rating confirms it survives a 2 J hammer blow (typical for panel-mounted gear). Overvoltage category III (fixed installation, not plug-in). No earth-leakage protection integrated (the MicroLogic 5.0 A is LSI only; add a Vigi module for ground-fault).","metaTitle":"Schneider Electric C125N35AFM ComPacT NS, 1250 A, 50 kA at 4","metaDescription":"Schneider Electric C125N35AFM ComPacT NS new generation circuit breaker, 1250 A, 50 kA Icu at 415 V AC, MicroLogic 5.0 A trip unit, LSI protection, IP40. Current production. Availa","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":"EN/IEC 60947-2","Width (W)":"210 mm","Height (H)":"327 mm","Control type":"Manually operated","Display type":"LCD display","Network type":"AC","Power losses":"44 W","Product name":"ComPacT NS new generation","Mounting mode":"Fixed","Thermal memory":"20 mn","Trip unit name":"MicroLogic 5.0 A","Number of poles":"3P","Protection type":"L : for overload protection (long time) S : for short time short-circuit protection I : for instantaneous short-circuit protection","lifecycle_stage":"current","Connection pitch":"70 mm","Local signalling":"4 LEDs (red) for fault indication 1 LED (yellow) for overload","Mounting support":"Backplate","Pollution degree":"3 conforming to IEC 60947","Range of product":"ComPacT NS630b...1600 new generation","Trip unit rating":"1250 A at 50 °C","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","Relative humidity":"0...95 %","Upside connection":"Front","Device application":"Distribution","Operating altitude":"0...2000 m without derating 2000 m...5000 m with derating","[In] rated current":"1250 A at 50 °C","Downside connection":"Front","Type of measurement":"Ammeter","Overvoltage category":"III","Trip unit technology":"Electronic","Utilisation category":"Category B","Electrical durability":"2000 cycles at 690 V In 3000 cycles at 690 V In/2 4000 cycles at 440 V In 5000 cycles at 440 V In/2","Mechanical durability":"10000 cycles","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","Earth-leakage protection":"Without","Product or component type":"Circuit breaker","Suitability for isolation":"Yes conforming to EN/IEC 60947-2","Protected poles description":"3D","Auxiliary contact composition":"1 NO/NC","[Ui] rated insulation voltage":"800 V AC 50/60 Hz conforming to IEC 60947-2","Trip unit protection functions":"LSI","[Ue] rated operational voltage":"690 V AC 50/60 Hz","Zone selective interlocking ZSI":"With","Electrical shock protection class":"Class II on front face","Ambient air temperature for storage":"-40...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","[Tr] Long-Time Delay Adjustment Range":"12.5...600 s at 1.5 x Ir 0.5...24 s at 6 x Ir 0.7...16.6 s at 7.2 x Ir","[Uimp] rated impulse withstand voltage":"8 kV conforming to IEC 60947-2","[Tsd] Short-Time Delay Adjustment Range":"0.1...0.4 s I²t=on 0...0.4 s I²t=off","[Icw] rated short-time withstand current":"19.2 kA 1 s conforming to IEC 60947-2","Long-time protection delay adjustment type tr":"Adjustable 9 settings","Short-time protection delay adjustment type tsd":"Adjustable","Short-time protection pick-up adjustment type Isd":"Adjustable 9 settings","[Ir] long-time protection pick-up adjustment range":"0.4...1 x In","Instantaneous protection pick-up adjustment type Ii":"Adjustable","[Isd] Short-time protection pick-up adjustment range":"1.5...10 x Ir","[Ii] instantaneous protection pick-up adjustment range":"Off 2...15 x In","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable 9 settings"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/41cf771f46f2ce0e78b03ca56ba9a43b.pdf","sourceUrl":"https://www.se.com/ng/en/product/C125N35AFM/circuit-breaker-compact-ns1250n-50ka-at-415vac-3p-fixed-manually-operated-micrologic-5-0a-control-unit-1250a/","alternativesUrl":"https://aoctrl.com/api/mcp/products/C125N35AFM/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy C125N35AFM and what is the lead time?","answer":"The C125N35AFM is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price."},{"question":"What is the breaking capacity of C125N35AFM at 415 V?","answer":"The breaking capacity (Icu) is 50 kA at 380/415 V AC 50/60 Hz per IEC 60947-2. At 220/240 V it is 85 kA, at 500/525 V it is 40 kA, and at 660/690 V it is 30 kA."},{"question":"What trip unit does C125N35AFM use?","answer":"It uses a MicroLogic 5.0 A electronic trip unit with LSI protection (long-time, short-time, instantaneous). It includes an LCD ammeter display and thermal memory with a 20-minute reset time."},{"question":"What are the mounting dimensions of C125N35AFM?","answer":"Fixed-mount on backplate. Dimensions: 327 mm high, 210 mm wide, 147 mm deep. Connection pitch is 70 mm. Front-connect both line and load sides."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C125N35AFM","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/C125N35AFM 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}}