{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV433963","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV433963","canonicalUrl":"https://aoctrl.com/schneider/LV433963","factsUrl":"https://aoctrl.com/api/mcp/products/LV433963","rawCanonicalId":null},"summary":{"shortDescription":"Schneider LV433963 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.","salesMarkdown":"## Overview The LV433963 is a MicroLogic 4.3 AL electronic trip unit for the Schneider ComPact NSX630 molded-case circuit breaker, rated 570 A switching current on a 440 V AC distribution network with 4 poles and LSoI protection functions (long-time, short-time, instantaneous). It carries UL 508, IEC 60947-2, EN 60947-2, and NEMA AB1 certifications, with integrated earth-leakage protection and a fixed long-time delay adjustment range of 11 s at 7.2 x Ir, 16 s at 6 x Ir, and 400 s at 1.5 x Ir. Schneider lists the LV433963 as discontinued; no official successor is named in the current catalogue. Remaining units are available through surplus and broker channels — send an RFQ to confirm quantity and lead time for a line-down or last-time-buy decision.","metaTitle":"Schneider LV433963 MicroLogic 4.3 AL trip unit, 570 A, 4-pole, discontinued","metaDescription":"Schneider LV433963 MicroLogic 4.3 AL electronic trip unit for ComPact NSX630: 570 A, 4 poles, 440 V AC, LSoI protection, distribution. Discontinued; sourced via surplus.","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 IEC 60947-2 EN 60947-2 NEMA AB1","Network type":"AC","Thermal memory":"20 minutes before and after tripping","Trip unit name":"MicroLogic 4.3 AL","Number of poles":"4P","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":"mature","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","Network frequency":"50/60 Hz","Device application":"Distribution","Trip unit technology":"Electronic","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","Neutral protection settings":"0.5 x Ir (3t + N/2) 1 x Ir (4t) No protection (3t)","Protected poles description":"4t 3t 3t + N/2","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":"250...570 A","[tsd] Short-time protection delay adjustment range":"0.02 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":"6900 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":"60 ms 0 ms 500 ms 150 ms 1 s","[IΔn] earth-leakage protection sensitivity adjustment range":"3 A 10 A 5 A 1 A 500 mA 300 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,885.44","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6ac698b6dde4c61dd5a8add83c883ce2.pdf","sourceUrl":"https://www.se.com/ph/en/product/LV433963/trip-unit-micrologic-4-3-al-for-compact-nsx-630-circuit-breakers-electronic-rating-570a-4-poles-4d/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV433963/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV433963","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/LV433963 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}}