{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV433966","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV433966","canonicalUrl":"https://aoctrl.com/schneider/LV433966","factsUrl":"https://aoctrl.com/api/mcp/products/LV433966","rawCanonicalId":null},"summary":{"shortDescription":"Schneider LV433966 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.","salesMarkdown":"## Overview The LV433966 is a Schneider MicroLogic 7.3 E AL electronic trip unit for the ComPact NSX630 frame, rated 570 A across 3 poles with LSI protection — long-time, short-time, and instantaneous — plus integrated earth-leakage detection. It carries an LCD display for metering and event logs, adjustable long-time delay from 15 to 400 s at 1.5 x Ir, and short-time delay adjustable from 0 to 0.4 s, with a long-time pickup range of 250 to 570 A. The 570 A continuous rating and adjustable long-time pickup down to 250 A let you fine-tune overload protection to the load without swapping the trip unit. The short-time delay range of 0 to 0.4 s supports selective coordination downstream, provided the upstream breaker's delay is set longer. Compared to the LV433806, which is a 4-pole, 100 A MicroLogic 7.3 E AL with fixed long-time delay and no earth-leakage, the LV433966 gives you 3 poles at 570 A, adjustable long-time delay, and integrated earth-leakage — choose the LV433966 when the load exceeds 100 A and you need coordination flexibility.","metaTitle":"Schneider LV433966 MicroLogic 7.3 E AL trip unit, 570 A, 3-pole","metaDescription":"Schneider LV433966 MicroLogic 7.3 E AL electronic trip unit for ComPact NSX630: 570 A, 3-pole, LSI protection, adjustable long-time and short-time delays, LCD display, earth-leakag","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Range":"ComPact","Standards":"UL 508 EN 60947-2 IEC 60947-2 NEMA AB1","Display type":"LCD display","Network type":"AC","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 7.3 E AL","Number of poles":"3P","Protection type":"L : for overload protection (long time) S : for short time short-circuit protection I : for instantaneous short-circuit protection","lifecycle_stage":"mature","Local signalling":"Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-1","Range of product":"ComPact NSX400...630","Network frequency":"50/60 Hz","Device application":"Distribution","Type of measurement":"Energy meter","Trip unit technology":"Electronic","Communication of data":"Protection and alarm settings Time-stamped histories and event tables Power quality Maximeters/minimeters Earth leakage current Demand current and power Energy metering Instantaneous and demand values Test reports Maintenance indicators","IP degree of protection":"IP40 conforming to IEC 60529","Trip unit rated current":"570 A at 40 °C","Earth-leakage protection":"Integrated","Product or component type":"Trip unit","Protected poles description":"3t","Earth-leakage protection class":"Class A","Trip unit protection functions":"LSI","[Ue] rated operational voltage":"440 V AC 50/60 Hz","Zone selective interlocking ZSI":"Without","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":"Adjustable","Short-time protection delay adjustment type tsd":"Adjustable","[Tr] Long-Time Protection Delay Adjustment Range":"15...400 s at 1.5 x Ir 0.35...11 s at 7.2 x Ir 0.5...16 s at 6 x Ir","Short-time protection pick-up adjustment type Isd":"Adjustable","[Ir] long-time protection pick-up adjustment range":"250...570 A","[tsd] Short-time protection delay adjustment range":"0...0.4 s","Instantaneous protection pick-up adjustment type Ii":"Adjustable","[Isd] Short-time protection pick-up adjustment range":"1.5...10 x Ir","[Ii] instantaneous protection pick-up adjustment range":"1.5...12 x In Compact NSX400 6900 A Compact NSX630","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":"500 ms 0 ms 150 ms 60 ms 1 s","[IΔn] earth-leakage protection sensitivity adjustment range":"3 A 500 mA 5 A 300 mA 10 A 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2,537.86","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/019751338639d3c3044d36829a17206f.pdf","sourceUrl":"https://www.se.com/uk/en/product/LV433966/trip-unit-micrologic-7-3-e-al-for-compact-nsx-630-circuit-breakers-electronic-rating-570a-3-poles-3d/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV433966/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV433966","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/LV433966 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}}