{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C254TM250C","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C254TM250C","canonicalUrl":"https://aoctrl.com/schneider/C254TM250C","factsUrl":"https://aoctrl.com/api/mcp/products/C254TM250C","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX250 series, thermal-magnetic trip unit, 250 A at 50 °C, 4 poles 4D, EN/IEC 60947-2.","salesMarkdown":"The C254TM250C is a TM-D thermal-magnetic trip unit from the Schneider Electric ComPacT NSX100...250 range, rated 250 A at 50 °C for 4-pole 4D distribution applications. It provides LI protection — thermal overload (L) with an adjustable long-time pickup from 0.7 to 1 x In and a fixed delay, plus magnetic short-circuit (I) adjustable from 5 to 10 x In. Rated operational voltage is 690 V AC 50/60 Hz or 750 V DC, certified to EN/IEC 60947-2. The adjustable long-time pickup (0.7–1 x In) lets you set the overload threshold to match the protected cable or load, while the fixed delay (120–400 s at 1.5 x In, 15 s at 6 x Ir) coordinates with downstream breakers. The magnetic instantaneous trip adjustable from 5 to 10 x In gives selectivity headroom for motor starts or transformer inrush without sacrificing short-circuit protection. This is a fixed-mount trip unit for the ComPacT NSX250 molded-case circuit breaker frame — it snaps into the breaker body, not onto a DIN rail directly. The 4-pole 4D configuration protects all four poles, with the neutral on the left and a 1 x Ir neutral protection setting. IP40 front face protection handles typical panel dust, but keep it inside an enclosure for washdown areas.","metaTitle":"C254TM250C ComPacT NSX250 Trip Unit, 250 A, 4P","metaDescription":"C254TM250C thermal-magnetic trip unit for ComPacT NSX250, 250 A at 50 °C, 4 poles 4D, EN/IEC 60947-2, active production. Quoted 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":"C254TM250C","Standards":"EN/IEC 60947-2","description":"Trip unit TM250D, ComPacT NSX250, thermal magnetic, rating 250A, 50 degrees C, 4 poles 4D","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":"1 x Ir (4D)","Protected poles description":"4D","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/c7caa8a7ab8d436e2f8d83df43b41a41.pdf","sourceUrl":"https://www.se.com/vn/en/product/C254TM250C/trip-unit-tm250d-compact-nsx250-thermal-magnetic-rating-250a-50-degrees-c-4-poles-4d/"},"ai":{"faq":[{"question":"What standards does the C254TM250C comply with?","answer":"It is certified to EN/IEC 60947-2, the standard for low-voltage switchgear and controlgear. Pollution degree 3 per IEC 60947-1 applies."},{"question":"Where can I buy the C254TM250C and what is the lead time?","answer":"The C254TM250C 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 closest alternative to the C254TM250C?","answer":"Within the ComPacT NSX250 family, the C254TM250C is the 250 A TM-D thermal-magnetic trip unit for 4-pole 4D distribution. Other ratings (e.g., 100 A, 160 A, 200 A) or electronic trip units (Micrologic) exist in the same frame, but the TM-D is the fixed-function thermal-magnetic option at this amp rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C254TM250C","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/C254TM250C 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}}