{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C1044A040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C1044A040","canonicalUrl":"https://aoctrl.com/schneider/C1044A040","factsUrl":"https://aoctrl.com/api/mcp/products/C1044A040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX100...250, MicroLogic 4.2 AL electronic trip unit, 40 A at 40 °C, 4P, EN/IEC 60947-2, integrated earth-leakage protection.","salesMarkdown":"The Schneider Electric C1044A040 is a MicroLogic 4.2 AL electronic trip unit for the ComPacT NSX100...250 range, rated 40 A at 40 °C with 4 poles (4P). The trip unit integrates earth-leakage protection (Class A) and provides LSoI protection functions: long-time (L), short-time (So), and instantaneous (I) short-circuit protection, plus overload protection. ## Protection settings and adjustment ranges The long-time protection pick-up (Ir) is adjustable from 18 to 40 A, with fixed delay settings: 400 s at 1.5 x Ir, 16 s at 6 x Ir, and 11 s at 7.2 x Ir. The short-time protection pick-up (Isd) adjusts from 1.5 to 10 x Ir with a fixed delay. Instantaneous protection (Ii) is fixed at 600 A. Earth-leakage sensitivity (IΔn) and time delay (Δt) are both adjustable. The neutral protection settings offer three options: 0.5 x Ir (3D + N/2), 1 x Ir (4D), or no protection (3D). Rated for ambient air temperatures from -25 to 70 °C during operation and -40 to 85 °C in storage. IP40 protection per IEC 60529. The trip unit mounts fixed in the ComPacT NSX breaker; neutral position is left. Local signalling includes a flashing green LED for ready status, red LED at 105% Ir for overload, orange LED at 90% Ir for overload, and a yellow indicator for residual current.","metaTitle":"Schneider Electric C1044A040 MicroLogic 4.2 AL Trip Unit, 40","metaDescription":"Schneider Electric C1044A040 MicroLogic 4.2 AL electronic trip unit for ComPacT NSX. 40 A at 40 °C, 4P, EN/IEC 60947-2. Integrated earth-leakage protection. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Range":"ComPacT","title":"C1044A040","Standards":"EN/IEC 60947-2","description":"Trip unit MicroLogic Vigi 4.2AL, ComPacT NSX100/160/250, 4 poles, electronic basic protections, earth leakage alarm, 40A","Network type":"AC","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 4.2 AL","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","Local signalling":"Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload Color indicator (yellow) for residual current","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-1","Range of product":"ComPacT NSX100...250","Trip unit rating":"40 A at 40 °C","Network frequency":"50/60 Hz","Poles description":"4P","Device application":"Distribution","Trip unit technology":"Electronic","IP degree of protection":"IP40 conforming to IEC 60529","Earth-leakage protection":"Integrated","Product or component type":"Trip unit","Neutral protection settings":"0.5 x Ir (3D + N/2) 1 x Ir (4D) No protection (3D)","Protected poles description":"3D + N/2 4D 3D","Circuit breaker mounting mode":"Fixed","Earth-leakage protection class":"Class A","Trip unit protection functions":"LSoI","[Ue] rated operational voltage":"440 V AC 50/60 Hz","Zone selective interlocking ZSI":"Without","Electrical shock protection class":"Class II","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-25...70 °C","Earth-leakage protection specific mode":"OFF using the IΔn rotary switch","Long-time protection delay adjustment type tr":"Fixed","Short-time protection delay adjustment type tsd":"Fixed","[Tr] Long-Time Protection Delay Adjustment Range":"11 s at 7.2 x Ir 16 s at 6 x Ir 400 s at 1.5 x Ir","Short-time protection pick-up adjustment type Isd":"Adjustable","[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","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","[Δt] Earth-leakage protection time delay adjustment range":"0 ms 60 ms 150 ms 500 ms 1 s","[IΔn] earth-leakage protection sensitivity adjustment range":"0.03 A 0.1 A 0.3 A 0.5 A 1 A 3 A 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/09718ca3e5103c17f4c7b6d3ca0324cd.pdf","sourceUrl":"https://www.se.com/be/en/product/C1044A040/trip-unit-micrologic-vigi-4-2al-compact-nsx100-160-250-4-poles-electronic-basic-protections-earth-leakage-alarm-40a/"},"ai":{"faq":[{"question":"What is the C1044A040's rated current and voltage?","answer":"The trip unit is rated 40 A at 40 °C with a rated operational voltage of 440 V AC at 50/60 Hz."},{"question":"What protection functions does the MicroLogic 4.2 AL provide?","answer":"It provides LSoI protection: long-time overload (L), short-time short-circuit (So) with fixed delay, and instantaneous short-circuit (I). Integrated earth-leakage protection is Class A."},{"question":"What standards does the C1044A040 comply with?","answer":"The trip unit complies with EN/IEC 60947-2 for low-voltage switchgear and controlgear."},{"question":"Where can I buy the C1044A040?","answer":"The C1044A040 is available to order through independent distribution. Submit an RFQ for current pricing and availability confirmation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C1044A040","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/C1044A040 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}}