{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C25B32D250","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C25B32D250","canonicalUrl":"https://aoctrl.com/schneider/C25B32D250","factsUrl":"https://aoctrl.com/api/mcp/products/C25B32D250","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX circuit breaker, NSX250B frame, 250 A, 40 kA Icu at 240 V AC, MicroLogic 2.2 electronic trip unit, 3-pole.","salesMarkdown":"The C25B32D250 is a Schneider Electric ComPacT NSX250B moulded-case circuit breaker (MCCB) in the ComPacT range, rated 250 A at 40 °C with a MicroLogic 2.2 electronic trip unit. The MicroLogic 2.2 provides L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous short-circuit) protection curves, so you can coordinate selectively downstream without nuisance tripping on motor inrush or transformer energisation. Breaking capacity is 40 kA Icu at 220/240 V AC, 25 kA at 380/415 V, 20 kA at 440 V, and 15 kA at 500 V, all per IEC 60947-2. The 3-pole (3P) version covers three-phase distribution. ## Selectivity and coordination This allows cascaded selectivity with downstream breakers — a 250 A feeder can hold in for a downstream 100 A branch fault long enough for the branch breaker to clear, keeping the rest of the panel live. Utilisation category A means it is not intended for frequent switching of motor loads under normal operation — it is a distribution breaker, not a motor starter. For motor circuit protection, pair it with a contactor and overload relay upstream. Connection pitch is 35 mm, so busbar or cable lugs align with standard 35 mm centres. IP40 enclosure protection is fine for clean indoor panels; IK07 impact resistance handles accidental tool drops during maintenance. Mounts horizontally or vertically flat on the backplate — no derating needed for orientation.","metaTitle":"Schneider Electric C25B32D250 ComPacT NSX250B, 250 A, 40 kA","metaDescription":"Schneider Electric C25B32D250 ComPacT NSX circuit breaker, 250 A rating, 40 kA Icu at 240 V AC. MicroLogic 2.2 electronic trip unit, EN/IEC 60947-2. 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":"C25B32D250","Depth (D)":"86 mm","Standards":"EN/IEC 60947-2","Width (W)":"105 mm","Height (H)":"161 mm","description":"Circuit breaker, ComPacT NSX250B, 25kA/415VAC, 3 poles, MicroLogic 2.2 trip unit 250A","Control type":"Toggle","Network type":"AC","Product name":"ComPacT NSX","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 2.2","Number of slots":"5 slot(s)","Protection type":"L : for overload protection (long time) So : for short time short-circuit protection with fixed delay I : for instantaneous short-circuit protection","lifecycle_stage":"current","Connection pitch":"35 mm","Local signalling":"Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload","Mounting support":"Backplate","Pollution degree":"3 conforming to IEC 60664-1","Trip unit rating":"250 A at 40 °C","Breaking capacity":"40 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 15 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2","Device short name":"NSX250B","Mounting position":"Horizontal and vertical Flat on the back","Network frequency":"50/60 Hz","Poles description":"3P","Relative humidity":"0...95 %","Upside connection":"Front","Device application":"Distribution","Operating altitude":"0...2000 m without derating 2000 m...5000 m with derating","[In] rated current":"250 A at 40 °C","Downside connection":"Front","Overvoltage category":"III","Trip unit technology":"Electronic","Utilisation category":"Category A","Electrical durability":"20000 cycles at 440 V In/2 10000 cycles at 440 V In 10000 cycles at 690 V In/2 5000 cycles at 690 V In","Mechanical durability":"20000 cycles","Breaking capacity code":"B 25 kA 415 V AC","IK degree of protection":"IK07 conforming to IEC 62262","IP degree of protection":"IP40 conforming to IEC 60529","Earth-leakage protection":"Without","Product or component type":"Circuit breaker","Suitability for isolation":"Yes conforming to EN/IEC 60947-2","Power dissipation per pole":"17.6 W","Protected poles description":"3D","Circuit breaker mounting mode":"Fixed","[Ui] rated insulation voltage":"800 V AC 50/60 Hz","Trip unit protection functions":"LSoI","[Ue] rated operational voltage":"690 V AC 50/60 Hz","Zone selective interlocking ZSI":"Without","Electrical shock protection class":"Class II on front face","Ambient air temperature for storage":"-50...85 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"40 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 15 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2","[Tr] Long-Time Delay Adjustment Range":"400 s at 1.5 x Ir 16 s at 6 x Ir 11 s at 7.2 x Ir","[Uimp] rated impulse withstand voltage":"8 kV","Long-time protection delay adjustment type tr":"Fixed","Short-time protection delay adjustment type tsd":"Fixed","Short-time protection pick-up adjustment type Isd":"Adjustable 9 settings","[Ir] long-time protection pick-up adjustment range":"100...250 A","Instantaneous protection pick-up adjustment type Ii":"Fixed","[Isd] Short-time protection pick-up adjustment range":"1.5...10 x Ir","[Ii] instantaneous protection pick-up adjustment range":"3000 A","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable 9 settings"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$441.92","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f92e52b5792512a17eec9981271f5148.pdf","sourceUrl":"https://www.se.com/hk/en/product/C25B32D250/circuit-breaker-compact-nsx250b-25ka-415vac-3-poles-micrologic-2-2-trip-unit-250a/"},"ai":{"faq":[{"question":"What is the breaking capacity of C25B32D250 at 415 V?","answer":"25 kA Icu at 380/415 V AC 50/60 Hz per IEC 60947-2. At 440 V it drops to 20 kA, and at 500 V to 15 kA."},{"question":"What trip unit does C25B32D250 use?","answer":"A MicroLogic 2.2 electronic trip unit with L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous short-circuit) protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C25B32D250","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/C25B32D250 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}}