{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C10H42D040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C10H42D040","canonicalUrl":"https://aoctrl.com/schneider/C10H42D040","factsUrl":"https://aoctrl.com/api/mcp/products/C10H42D040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX, NSX100H, circuit breaker, 40 A, 100 kA Icu at 240 V AC, MicroLogic 2.2 electronic trip unit, 4P, toggle control.","salesMarkdown":"The Schneider C10H42D040 is a ComPacT NSX100H molded-case circuit breaker with a 40 A MicroLogic 2.2 electronic trip unit, four poles, and a 100 kA interrupting capacity at 240 V AC. At 415 V AC the breaking capacity is 70 kA Icu, and at 480 V AC it holds 65 kA Icu. The MicroLogic 2.2 trip unit provides LSI protection: long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I). No earth-leakage protection is built in, so if ground-fault detection is required, add a Vigi module or external relay. Above 40 °C, derate per the IEC 60947-2 thermal curve. The 4P configuration places the neutral on the left, and the device is category A (no intentional short-time delay for selectivity with downstream breakers — selectivity relies on the MicroLogic's adjustable curves). ## Deployment context: panel integration and environment Mounts on a backplate in any orientation — horizontal, vertical, or flat on the back. The 140 mm width, 161 mm height, and 86 mm depth fit standard distribution panel cutouts; the 35 mm connection pitch matches busbar systems and common terminal blocks. IP40 enclosure protection means it is suitable for indoor panels where no water spray is present; the IK07 impact rating handles accidental tool strikes during commissioning. Connections are front-access both top and bottom, so the breaker can be wired without reaching behind the panel. Five accessory slots accept auxiliary contacts, shunt trips, undervoltage releases, or communication modules — leaving room for future expansion without swapping the breaker frame. The NSX100H frame (100 A frame, H breaking capacity) is the same mechanical platform used across the 40 A to 100 A trip unit range. If a higher or lower amp rating is needed later, the MicroLogic 2.2 trip unit can be swapped without replacing the breaker base — but the order code C10H42D040 is fixed at 40 A. No direct pin-compatible second source exists; the ComPacT NSX is a proprietary Schneider design. UL 60947-4-1 listing is also confirmed for 85 kA Icu at 240 V AC, 65 kA at 480 V AC, and 10 kA at 600 V AC.","metaTitle":"Schneider C10H42D040 ComPacT NSX100H, 40 A, 100 kA Icu","metaDescription":"Schneider C10H42D040 ComPacT NSX100H circuit breaker, 40 A rated, 100 kA Icu at 240 V AC, MicroLogic 2.2 electronic trip unit, 4P, current production. 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":"C10H42D040","Depth (D)":"86 mm","Standards":"EN/IEC 60947-2","Width (W)":"140 mm","Height (H)":"161 mm","description":"Circuit breaker ComPacT NSX100H, 70kA at 415VAC, MicroLogic 2.2 trip unit 40A, 4 poles 4d","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":"100 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 70 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 65 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 35 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2 85 kA Icu at 240 V AC 50/60 Hz conforming to UL 60947-4-1 65 kA Icu at 480 V AC 50/60 Hz conforming to UL 60947-4-1 10 kA Icu at 600 V AC 50/60 Hz conforming to UL 60947-4-1","Device short name":"NSX100H","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":"H 70 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":"100 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 70 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 65 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2 35 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 kA at 660/690 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/176c95fb2bca0308dd9a6753dd691d13.pdf","sourceUrl":"https://www.se.com/ng/en/product/C10H42D040/circuit-breaker-compact-nsx100h-70ka-at-415vac-micrologic-2-2-trip-unit-40a-4-poles-4d/"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to C10H42D040 in this component family?","answer":"No direct pin-compatible second source exists; the ComPacT NSX is a proprietary Schneider design. Within the same NSX100H frame, the trip unit rating can be changed by swapping the MicroLogic module, but the order code C10H42D040 is fixed at 40 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C10H42D040","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/C10H42D040 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}}