{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C256TM250C","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C256TM250C","canonicalUrl":"https://aoctrl.com/schneider/C256TM250C","factsUrl":"https://aoctrl.com/api/mcp/products/C256TM250C","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX250, TM-D trip unit, thermal-magnetic, 250 A at 50 °C, 4 poles 3D, LI protection.","salesMarkdown":"The C256TM250C is a thermal-magnetic trip unit from the Schneider Electric ComPacT NSX250 range, rated 250 A at 50 °C. It provides LI protection — thermal overload (L) and magnetic short-circuit (I) — in a 4-pole, 3D configuration (three protected poles, neutral unprotected). The TM-D trip unit is fixed-mount, designed for distribution applications per EN/IEC 60947-2. The 250 A rating at 50 °C sets the continuous current capacity for this trip unit in a 50 °C ambient — if your panel runs hotter, expect derating per the manufacturer's curve. The LI protection scheme means you get adjustable long-time pickup (Ir) from 0.7 to 1.0 x In and adjustable instantaneous pickup (Ii) from 5 to 10 x In, giving you selectivity tuning for downstream breakers. The 690 V AC / 750 V DC rated operational voltage covers most industrial distribution voltages, including 480Y/277 V and 600 V systems common in North America, plus DC bus applications up to 750 V.","metaTitle":"Schneider Electric C256TM250C ComPacT NSX250 Trip Unit, 250","metaDescription":"Schneider Electric C256TM250C thermal-magnetic trip unit for ComPacT NSX250. Rated 250 A at 50 °C, 4P 3D, LI protection, EN/IEC 60947-2. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Range":"ComPacT","title":"C256TM250C","Standards":"EN/IEC 60947-2","description":"Trip unit TM250D, ComPacT NSX250, thermal magnetic, rating 250A, 50 degrees C, 4 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","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-1","Range of product":"ComPacT NSX100...250","Trip unit rating":"250 A at 50 °C","Network frequency":"50/60 Hz","Poles description":"4P","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","Neutral protection settings":"No protection (3D)","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":"Adjustable","[Ii] instantaneous protection pick-up adjustment range":"5...10 x In","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/79b71de1a4e54eeba1fcca579bf907ca.pdf","sourceUrl":"https://www.se.com/nl/en/product/C256TM250C/trip-unit-tm250d-compact-nsx250-thermal-magnetic-rating-250a-50-degrees-c-4-poles-3d/"},"ai":{"faq":[{"question":"What are the key ratings for C256TM250C?","answer":"Rated 250 A at 50 °C, 690 V AC / 750 V DC, 4 poles 3D, LI protection with adjustable Ir (0.7–1.0 x In) and Ii (5–10 x In). Complies with EN/IEC 60947-2."},{"question":"Where can I buy C256TM250C?","answer":"The C256TM250C is available to order against an RFQ through independent distribution channels. Pricing and stock levels are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C256TM250C","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/C256TM250C 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}}