{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C10B44V040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C10B44V040","canonicalUrl":"https://aoctrl.com/schneider/C10B44V040","factsUrl":"https://aoctrl.com/api/mcp/products/C10B44V040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric, ComPacT NSX series, MCCB, 4P, 40 A, 40 kA Icu at 240 V AC, electronic MicroLogic 4.2 trip unit with integrated earth-leakage protection.","salesMarkdown":"The Schneider Electric C10B44V040 is a ComPacT NSX100B molded-case circuit breaker, 4-pole, with a 40 A electronic MicroLogic 4.2 trip unit. This is the version with integrated earth-leakage protection — the 'V' in the code flags that. It's rated for distribution duty (category A) and carries a 40 kA Icu at 220/240 V AC, 25 kA at 415 V, and 20 kA at 440 V per IEC 60947-2. ## Breaking capacity and what it means on your line At 415 V — common for European industrial distribution — it's still 25 kA. That puts it in the 'B' breaking capacity class for 415 V systems. The MicroLogic 4.2 trip unit gives you L (long-time overload), So (short-time short-circuit with fixed delay), I (instantaneous), and R (earth-leakage) protection curves. The earth-leakage is integrated, so you don't need a separate Vigi module or external RCD — saves a pole space and one wiring step. Mounts on a backplate — no DIN rail here, so plan for bolt-down or screw-mount in the enclosure. The 4-pole version with the earth-leakage module is the same footprint as the standard 4P, so existing cutouts and busbar layouts carry over. Connection pitch is 35 mm, front-connected both top and bottom. Toggle handle for manual switching, with a rotary IΔn switch for the earth-leakage test/reset. ## Durability and environment Rated for 50,000 mechanical cycles and 30,000 electrical cycles at 440 V at full rated current. That's a solid service life for a distribution MCCB — expect it to outlast the panel refresh cycle in most plants.","metaTitle":"Schneider C10B44V040 ComPacT NSX 40A MCCB, 40kA Icu, MicroLo","metaDescription":"Schneider Electric C10B44V040 ComPacT NSX100B MCCB. 40A electronic trip unit, 40 kA Icu at 240V, integrated earth-leakage. Active production. Sourced to order. EN/IEC 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Range":"ComPacT","Depth (D)":"86 mm","Standards":"EN/IEC 60947-2","Width (W)":"140 mm","Height (H)":"161 mm","Control type":"Toggle","Network type":"AC","Product name":"ComPacT NSX","Operating mode":"OFF using the IΔn rotary switch","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 4.2","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 R : for earth-leakage 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":"IV","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":"Integrated","Product or component type":"Earth leakage 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":"5.8 W N 5.8 W L1 and L3 4.9 W L2","Protected poles description":"4D 3D + N/2 3D","Circuit breaker mounting mode":"Fixed","[Ui] rated insulation voltage":"500 V AC 50/60 Hz","Earth-leakage protection class":"Class A","Trip unit protection functions":"LSoIR","[Ue] rated operational voltage":"440 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","[Ir] long-time protection pick-up adjustment range":"18...40 A","[Δt] residual earth-leakage time delay adjustment":"0 ms 60 ms 150 ms 500 ms 1 s","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","Earth-leakage protection sensitity adjustment type IΔn":"Adjustable","Earth-leakage protection time delay adjustement type Δt":"Adjustable","Long-time pick-up adjustment type Ir (thermal protection)":"Adjustable 9 settings","[IΔn] earth-leakage protection sensitivity adjustment range":"30 mA 100 mA 300 mA 500 mA 1 A 3 A 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,108.12 – $2,008.80","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/24d0c3f60da9e1173e0c8dbcae14fa27.pdf","sourceUrl":"https://www.se.com/ng/en/product/C10B44V040/circuit-breaker-compact-nsx100b-25ka-415vac-4-poles-micrologic-vigi-4-2-trip-unit-40a/","alternativesUrl":"https://aoctrl.com/api/mcp/products/C10B44V040/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy C10B44V040 and how do I get a price?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the closest alternative to C10B44V040 in the ComPacT NSX family?","answer":"The closest sibling is the standard C10B44V040 without the 'V' suffix — that would be a C10B44D040, which omits the integrated earth-leakage protection. If you need earth-leakage, the V-suffix is the one; if you don't, the D-suffix saves a small cost. Both share the same frame, trip unit rating, and breaking capacity."},{"question":"What compliance documentation does Schneider provide for C10B44V040?","answer":"The breaker is certified to EN/IEC 60947-2. The manufacturer typically provides a Declaration of Performance (DoP) and CE declaration on request. RoHS and REACH compliance are standard for current-production Schneider MCCBs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C10B44V040","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/C10B44V040 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}