{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C10B42D040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C10B42D040","canonicalUrl":"https://aoctrl.com/schneider/C10B42D040","factsUrl":"https://aoctrl.com/api/mcp/products/C10B42D040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX, NSX100B frame, 40 A, 4P, MicroLogic 2.2 electronic trip unit, 40 kA Icu at 240 V AC, toggle control.","salesMarkdown":"The C10B42D040 is a Schneider Electric ComPacT NSX molded-case circuit breaker in the NSX100B frame, rated 40 A at 40 °C with a MicroLogic 2.2 electronic trip unit. Four poles, toggle control, front-connected — it's built for distribution duty in a backplate-mounted panel. This breaker delivers 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. For a 400 V distribution board, that 25 kA Icu gives you headroom above typical utility fault levels (often 18–22 kA), so you can coordinate downstream without cascading failures. The electronic trip also means you get adjustable long-time and short-time pickup — not just a thermal-magnetic fixed curve. Connection pitch is 35 mm, and both line and load connections are front-accessed, so you can land cables without pulling the breaker out of the panel. IP40 enclosure protection keeps dust out but isn't rated for washdown — keep it inside a cabinet.","metaTitle":"C10B42D040 ComPacT NSX 40A 4P MCCB, 40 kA Icu at 240 V","metaDescription":"C10B42D040 ComPacT NSX 100B frame, 40 A MicroLogic 2.2 electronic trip, 4P, 40 kA Icu at 240 V AC. Active production, sourced to order. Quoted against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Range":"ComPacT","title":"C10B42D040","Depth (D)":"86 mm","Standards":"EN/IEC 60947-2","Width (W)":"140 mm","Height (H)":"161 mm","description":"Circuit breaker, ComPacT NSX100B, 25kA/415VAC, 4 poles, MicroLogic 2.2 trip unit 40A","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","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60664-1","Trip unit rating":"40 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":"NSX100B","Mounting position":"Horizontal and vertical Flat on the back","Network frequency":"50/60 Hz","Poles description":"4P","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":"40 A at 40 °C","Downside connection":"Front","Overvoltage category":"III","Trip unit technology":"Electronic","Utilisation category":"Category A","Electrical durability":"50000 cycles at 440 V In/2 30000 cycles at 440 V In 20000 cycles at 690 V In/2 10000 cycles at 690 V In","Mechanical durability":"50000 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","Neutral protection setting":"0.5 x Ir (3D + N/2) 1 x Ir (4D) No protection (3D)","Power dissipation per pole":"1.3 W","Protected poles description":"4D 3D + N/2 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 7 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":"18...40 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":"600 A","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable 9 settings"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$393.00 – $645.73","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/959f38a99f72cd7e8058d2abdcb70ebd.pdf","sourceUrl":"https://www.se.com/hk/en/product/C10B42D040/circuit-breaker-compact-nsx100b-25ka-415vac-4-poles-micrologic-2-2-trip-unit-40a/"},"ai":{"faq":[{"question":"Where can I buy C10B42D040 and how do I get a price?","answer":"The C10B42D040 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is C10B42D040's breaking capacity at 415 V?","answer":"The C10B42D040 has a breaking capacity of 25 kA Icu at 380/415 V AC per IEC 60947-2."},{"question":"What trip unit does C10B42D040 use?","answer":"It uses a MicroLogic 2.2 electronic trip unit providing 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/C10B42D040","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/C10B42D040 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}}