{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C256TM160C","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C256TM160C","canonicalUrl":"https://aoctrl.com/schneider/C256TM160C","factsUrl":"https://aoctrl.com/api/mcp/products/C256TM160C","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX250, TM-D trip unit, thermal-magnetic, 160 A at 50 °C, 4 poles 3D, LI protection, EN/IEC 60947-2.","salesMarkdown":"It is rated 160 A at 50 °C, with 4 poles configured as 3D (three protected poles, neutral left position with no protection). The LI protection curve covers overload (thermal, adjustable Ir from 0.7 to 1 x In) and short-circuit (magnetic, fixed Ii at 1250 A). This is the drop-in trip unit that defines the breaker's protection settings — you swap it into the NSX250 frame, not the whole breaker. If your panel runs hotter, you derate — the TM-D's thermal element responds to both load current and ambient temperature. The fixed instantaneous trip at 1250 A (about 7.8 x In) means it clears bolted faults fast, but you lose the ability to dial up the magnetic pickup for high-inrush loads like large motors. The adjustable long-time pickup (Ir) lets you fine-tune the overload threshold between 112 A and 160 A, which is useful when the connected load is smaller than the frame rating. ## Where it fits and how it mounts This trip unit mounts into the ComPacT NSX250 fixed breaker. The breaker itself is DIN-rail or screw-panel mount, depending on the base. Electrical shock protection class II — double-insulated, no earth connection needed.","metaTitle":"Schneider Electric C256TM160C ComPacT NSX250 TM-D Trip Unit,","metaDescription":"Schneider Electric C256TM160C thermal-magnetic trip unit for ComPacT NSX250. Rated 160 A at 50 °C, 4 poles 3D, LI protection. Active production, sourced to order. EN/IEC 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Range":"ComPacT","title":"C256TM160C","Standards":"EN/IEC 60947-2","description":"Trip unit TM160D, ComPacT NSX250, thermal magnetic, rating 160A, 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":"160 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":"Fixed","[Ii] instantaneous protection pick-up adjustment range":"1250 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/20b2e2fb0c6fd522d38515225f819928.pdf","sourceUrl":"https://www.se.com/vn/en/product/C256TM160C/trip-unit-tm160d-compact-nsx250-thermal-magnetic-rating-160a-50-degrees-c-4-poles-3d/"},"ai":{"faq":[{"question":"How do I get current pricing and availability for C256TM160C?","answer":"Pricing and availability are confirmed at quote time against an RFQ through independent distribution. Submit a request for current pricing and lead time."},{"question":"What is C256TM160C's listed range on this component line?","answer":"The C256TM160C belongs to the ComPacT range, specifically the ComPacT NSX100...250 series."},{"question":"What standards does C256TM160C comply with?","answer":"The C256TM160C is listed to EN/IEC 60947-2, the standard for low-voltage switchgear and controlgear."},{"question":"What protection functions does the TM-D trip unit provide?","answer":"The TM-D trip unit provides LI protection: L for thermal overload (adjustable Ir from 0.7 to 1 x In) and I for magnetic short-circuit (fixed Ii at 1250 A)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C256TM160C","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/C256TM160C 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}}