{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C103MG040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C103MG040","canonicalUrl":"https://aoctrl.com/schneider/C103MG040","factsUrl":"https://aoctrl.com/api/mcp/products/C103MG040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX series, TM-G trip unit C103MG040, thermal-magnetic, 40 A, 3 poles 3D, 690 V AC / 750 V DC, EN/IEC 60947-2.","salesMarkdown":"## TM-G trip unit for generator protection The C103MG040 is a TM-G thermal-magnetic trip unit from the ComPacT NSX100...250 family, rated 40 A at 40 °C. It protects three poles (3D) in a fixed-mount breaker. The TM-G curve is tuned for generator applications — the long-time pickup is adjustable 0.7–1 x In, and the instantaneous pickup is fixed at 80 A (2 x In for this 40 A rating). That fixed magnetic threshold means it rides through generator inrush without nuisance tripping, but verify coordination with downstream loads. ## Voltage and standard compliance Conforms to EN/IEC 60947-2 for low-voltage switchgear. IP40 front face protection.","metaTitle":"C103MG040 Trip Unit TM40G ComPacT NSX, 40 A, 3P","metaDescription":"C103MG040 TM-G trip unit for ComPacT NSX100-250 breakers. 40 A, 3P 3D, 690 V AC / 750 V DC. EN/IEC 60947-2. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Range":"ComPacT","title":"C103MG040","Standards":"EN/IEC 60947-2","description":"trip unit TM40G for ComPacT NSX 100/160 circuit breakers, thermal magnetic, rating 40 A, 3 poles 3d","Network type":"AC DC","Trip unit name":"TM-G","Protection type":"L : for overload protection (thermal) I : for short-circuit protection (magnetic)","lifecycle_stage":"current","Pollution degree":"3 conforming to IEC 60947-1","Range of product":"ComPacT NSX100...250 ComPacT NSX100...250 DC","Trip unit rating":"40 A at 40 °C","Network frequency":"50/60 Hz","Poles description":"3P","Device application":"Generator","Trip unit technology":"Thermal-magnetic","IP degree of protection":"IP40 conforming to IEC 60529","Earth-leakage protection":"Without","Product or component type":"Trip unit","Protected poles description":"3D","Circuit breaker mounting mode":"Fixed","Trip unit protection functions":"LI","[Ue] rated operational voltage":"690 V AC 50/60 Hz 750 V DC","Electrical shock protection class":"Class II","Ambient air temperature for storage":"-50...85 °C","Ambient air temperature for operation":"-25...70 °C","Long-time protection delay adjustment type tr":"Fixed","[Tr] Long-Time Protection Delay Adjustment Range":"120...400 s at 1.5 x In","[Ir] long-time protection pick-up adjustment range":"0.7...1 x In","Instantaneous protection pick-up adjustment type Ii":"Fixed","[Ii] instantaneous protection pick-up adjustment range":"80 A","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$86.27","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6a399795433454c9bbc3af192afef732.pdf","sourceUrl":"https://www.se.com/hk/en/product/C103MG040/trip-unit-tm40g-for-compact-nsx-100-160-circuit-breakers-thermal-magnetic-rating-40-a-3-poles-3d/"},"ai":{"faq":[{"question":"What is C103MG040's listed range and standards?","answer":"The C103MG040 belongs to the ComPacT NSX100...250 range and conforms to EN/IEC 60947-2."},{"question":"How do I get current pricing and availability for C103MG040?","answer":"Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through independent distribution channels."},{"question":"What is the closest alternative to C103MG040 in this family?","answer":"Within the ComPacT NSX100...250 range, other TM-G trip units differ only by rating (e.g., 25 A, 50 A). The C103MG040 is the 40 A variant; no pin-compatible drop-in exists outside the TM-G family without changing the breaker frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C103MG040","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/C103MG040 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}}