{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C4044A400","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C4044A400","canonicalUrl":"https://aoctrl.com/schneider/C4044A400","factsUrl":"https://aoctrl.com/api/mcp/products/C4044A400","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX, MicroLogic 4.3 AL electronic trip unit, 400 A, 4P, integrated earth-leakage, EN/IEC 60947-2.","salesMarkdown":"## What ships in the box The C4044A400 is a MicroLogic 4.3 AL electronic trip unit for the ComPacT NSX400...630 range, rated 400 A at 40 °C. It is a 4-pole unit with integrated earth-leakage protection (Class A) and LSoI protection functions: long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I). The kit is complete — the trip unit ships with the electronic module, the rotary switch for earth-leakage sensitivity adjustment, and the neutral protection settings configurable for 3D + N/2, 4D, or 3D. No holes in the box. The long-time pickup (Ir) is adjustable from 160 to 400 A, so you can dial it down to match a downstream load without swapping the trip unit. The short-time pickup (Isd) adjusts from 1.5 to 10 × Ir, giving you coordination flexibility for selective tripping with downstream breakers. Instantaneous pickup (Ii) is fixed at 4800 A — that is the hard floor for clearing high-fault currents. ## Deployment context This trip unit mounts into a ComPacT NSX400...630 fixed-mount circuit breaker. The breaker itself is DIN-rail or panel-mount, depending on the frame version.","metaTitle":"Schneider Electric C4044A400 ComPacT NSX Trip Unit, MicroLog","metaDescription":"Schneider Electric C4044A400 MicroLogic 4.3 AL electronic trip unit for ComPacT NSX400-630. 400 A rating, 4P, integrated earth-leakage, EN/IEC 60947-2. 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":"C4044A400","Standards":"EN/IEC 60947-2","description":"trip unit MicroLogic 4.3 AL for ComPacT NSX 400/630 circuit breakers, electronic, rating 400A, 4 poles 4d","Network type":"AC","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 4.3 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 NSX400...630","Trip unit rating":"400 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":"-50...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":"160...400 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":"4800 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":"0.3 A 0.5 A 1 A 3 A 5 A 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c005647c9852c2911f282ff9bdb6790e.pdf","sourceUrl":"https://www.se.com/hk/en/product/C4044A400/trip-unit-micrologic-4-3-al-for-compact-nsx-400-630-circuit-breakers-electronic-rating-400a-4-poles-4d/"},"ai":{"faq":[{"question":"Where can I buy C4044A400 and how do I get a price?","answer":"The C4044A400 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What is C4044A400's listed range and standards?","answer":"The C4044A400 is part of the Schneider Electric ComPacT NSX400...630 range and complies with EN/IEC 60947-2."},{"question":"What protection functions does the MicroLogic 4.3 AL provide?","answer":"The MicroLogic 4.3 AL provides LSoI protection: long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I), plus integrated earth-leakage protection (Class A)."},{"question":"What compliance documentation does Schneider provide for C4044A400?","answer":"The C4044A400 is certified to EN/IEC 60947-2 and carries IP40 protection (IEC 60529). It is designed for pollution degree 3 per IEC 60947-1. For specific RoHS, REACH, or UL documentation, request the compliance pack with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C4044A400","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/C4044A400 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}}