{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C103TM040C","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C103TM040C","canonicalUrl":"https://aoctrl.com/schneider/C103TM040C","factsUrl":"https://aoctrl.com/api/mcp/products/C103TM040C","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX100-250, TM-D trip unit, thermal-magnetic, 40 A at 50 °C, 3 poles 3D, EN/IEC 60947-2, IP40.","salesMarkdown":"## Trip unit for ComPacT NSX100-250 The C103TM040C is a TM-D thermal-magnetic trip unit for the Schneider Electric ComPacT NSX100-250 range, rated 40 A at 50 °C. It provides LI protection — thermal overload (L) and magnetic short-circuit (I) — across three protected poles (3D). The fixed instantaneous pickup trips at 500 A, and the long-time pickup is adjustable from 0.7 to 1.0 × In. This is the distribution-grade version, without earth-leakage detection. The 500 A instantaneous pickup (Ii) is fixed — roughly 12.5 × In — so it clears hard shorts fast but may not coordinate with downstream 10 kA MCBs on a high-fault bus. The TM-D trip unit is non-interchangeable in the field — it's a fixed thermal-magnetic design with a sealed housing. The long-time delay (tr) is fixed at 120–400 s at 1.5 × In and 15 s at 6 × Ir, which suits distribution feeders rather than motor-starting profiles. For motor loads, a TM-G or electronic Micrologic trip unit would be a better fit. The trip unit mounts into a ComPacT NSX100-250 fixed or plug-in circuit breaker. The breaker itself is IP40 front-face protected (finger-safe), suitable for enclosed panel mounting. The 3D pole configuration means the trip unit protects all three phases but does not include a neutral pole — use a 4P breaker if neutral protection is needed. No auxiliary contacts or shunt trip are integrated; those are add-on accessories that clip onto the breaker side.","metaTitle":"Schneider Electric C103TM040C ComPacT NSX TM-D Trip Unit, 40","metaDescription":"Schneider Electric C103TM040C trip unit, ComPacT NSX100-250, thermal-magnetic TM-D, 40 A at 50 °C, 3 poles, EN/IEC 60947-2. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Range":"ComPacT","title":"C103TM040C","Standards":"EN/IEC 60947-2","description":"Trip unit TM40D, ComPacT NSX100/160, thermal magnetic, rating 40A, 50 degrees C, 3 poles 3D","Network type":"AC DC","Trip unit name":"TM-D","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","Trip unit rating":"40 A at 50 °C","Network frequency":"50/60 Hz","Poles description":"3P","Device application":"Distribution","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 15 s at 6 x Ir","[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":"500 A","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2c5cbaf50922f708e89cbc551999464e.pdf","sourceUrl":"https://www.se.com/nl/en/product/C103TM040C/trip-unit-tm40d-compact-nsx100-160-thermal-magnetic-rating-40a-50-degrees-c-3-poles-3d/"},"ai":{"faq":[{"question":"What standards does C103TM040C comply with?","answer":"It complies with EN/IEC 60947-2 for low-voltage switchgear and controlgear. Pollution degree 3 per IEC 60947-1. Electrical shock protection Class II."},{"question":"What is the closest alternative to C103TM040C?","answer":"Within the same ComPacT NSX100-250 frame, the TM-D trip unit is the standard thermal-magnetic option. If you need adjustable short-time delay or earth-leakage, the Micrologic electronic trip units (e.g., Micrologic 2.2 or 5.2) fit the same breaker but require a different order code. No pin-compatible drop-in exists — the TM-D is the baseline."},{"question":"How do I get pricing and availability for C103TM040C?","answer":"Submit an RFQ through this listing. We source the part to order against confirmed demand; current pricing and stock position are provided at quote time. No automated price is displayed because supply conditions vary."},{"question":"What compliance documentation is available for C103TM040C?","answer":"The part carries EN/IEC 60947-2 certification. Schneider Electric typically provides a Declaration of Conformity covering the Low Voltage Directive and relevant harmonized standards. RoHS and REACH compliance is standard for current-production Schneider parts, though the specific declaration should be requested at order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C103TM040C","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/C103TM040C 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}}