{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"C1034A040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"C1034A040","canonicalUrl":"https://aoctrl.com/schneider/C1034A040","factsUrl":"https://aoctrl.com/api/mcp/products/C1034A040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ComPacT NSX100...250 series, MicroLogic 4.2 AL electronic trip unit, 40 A at 40 °C, 3-pole 3D, LSoI protection with integrated earth-leakage, EN/IEC 60947-2.","salesMarkdown":"## MicroLogic 4.2 AL trip unit for ComPacT NSX100...250 The Schneider Electric C1034A040 is a MicroLogic 4.2 AL electronic trip unit for the ComPacT NSX100...250 range of molded-case circuit breakers. It is a 3-pole (3D protected) unit rated at 40 A at 40 °C, with an operational voltage of 440 V AC at 50/60 Hz. The trip unit 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). ## Protection settings and adjustability The long-time pickup Ir is adjustable across 9 settings from 18 to 40 A, with fixed delay curves: 400 s at 1.5 x Ir, 16 s at 6 x Ir, and 11 s at 7.2 x Ir. Short-time pickup Isd adjusts from 1.5 to 10 x Ir, with a fixed delay. Instantaneous pickup Ii is fixed at 600 A. Earth-leakage sensitivity IΔn and time delay Δt are both adjustable, with Δt selectable from 0 ms, 60 ms, 150 ms, 500 ms, or 1 s. The trip unit is designed to EN/IEC 60947-2, with a pollution degree of 3 per IEC 60947-1 and IP40 front-face protection per IEC 60529. The unit is Class II for electrical shock protection. This is a fixed-mount trip unit for the ComPacT NSX100...250 breaker frame. It occupies the standard 3-pole slot and communicates local status via a flashing green LED (ready), red LED at 105% Ir (overload), orange LED at 90% Ir (pre-alarm), and a yellow indicator for residual current. No zone selective interlocking (ZSI) is provided on this variant. The earth-leakage function can be disabled via the IΔn rotary switch for applications where ground-fault coordination is handled upstream.","metaTitle":"C1034A040 ComPacT NSX MicroLogic 4.2 AL Trip Unit, 40 A, 3P","metaDescription":"C1034A040 ComPacT NSX100...250 MicroLogic 4.2 AL electronic trip unit. 40 A at 40 °C, 3-pole, LSoI protection with 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":"C1034A040","Standards":"EN/IEC 60947-2","description":"Trip unit MicroLogic Vigi 4.2AL, ComPacT NSX100/160/250, 3 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","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":"3P","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","Protected poles description":"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":"$10.42","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1a7892fbb31cc5276220c97df13d6d54.pdf","sourceUrl":"https://www.se.com/vn/en/product/C1034A040/trip-unit-micrologic-vigi-4-2al-compact-nsx100-160-250-3-poles-electronic-basic-protections-earth-leakage-alarm-40a/"},"ai":{"faq":[{"question":"What are the key protection functions of C1034A040?","answer":"The MicroLogic 4.2 AL provides LSoI protection: long-time overload (L) with adjustable Ir 18-40 A, short-time short-circuit (So) with adjustable Isd 1.5-10 x Ir and fixed delay, instantaneous short-circuit (I) fixed at 600 A, and integrated earth-leakage protection (Class A) with adjustable IΔn and Δt."},{"question":"What standards does C1034A040 comply with?","answer":"The trip unit complies with EN/IEC 60947-2, with pollution degree 3 per IEC 60947-1 and IP40 front protection per IEC 60529."},{"question":"Where can I buy C1034A040 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/C1034A040","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/C1034A040 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}}