{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV433952","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV433952","canonicalUrl":"https://aoctrl.com/schneider/LV433952","factsUrl":"https://aoctrl.com/api/mcp/products/LV433952","rawCanonicalId":null},"summary":{"shortDescription":"Schneider LV433952 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.","salesMarkdown":"## Overview The LV433952 is a Schneider MicroLogic 7.3 E electronic trip unit for the ComPact NSX400 and NSX630 molded-case circuit breaker frames, rated 400 A and configured for 4-pole distribution applications. It provides LSIR protection — long-time, short-time, instantaneous, and earth-leakage — with adjustable long-time pickup (Ir) from 160 to 400 A and adjustable short-time delay (Tsd) from 0 to 0.4 s. The 400 A rating and 4-pole configuration suit it for main or feeder protection in 3-phase + neutral distribution panels. The adjustable Ir range (160–400 A) lets you match the trip to the actual load without swapping the unit. Long-time delay Tr is adjustable from 15 to 400 s at 1.5 x Ir, giving flexibility for motor-start or transformer-inrush coordination. Against the LV434551 (160 A, fixed Tr), the LV433952 offers adjustable long-time delay and a 400 A rating, making it the better fit for applications needing coordination tuning.","metaTitle":"Schneider LV433952 MicroLogic 7.3 E trip unit, 400 A, 4-pole","metaDescription":"Schneider LV433952 MicroLogic 7.3 E electronic trip unit for ComPact NSX400/630, 400 A, 4-pole, LSIR protection, adjustable long-time and short-time delays.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Range":"ComPact","Standards":"IEC 60947-2 UL 508 EN 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","Number of poles":"4P","Protection type":"L : for overload protection (long time) S : for short time short-circuit protection I : for instantaneous short-circuit protection R : for earth-leakage 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":"Maximeters/minimeters Maintenance indicators Time-stamped histories and event tables Earth leakage current Energy metering Protection and alarm settings Test reports Instantaneous and demand values Demand current and power Power quality","IP degree of protection":"IP40 conforming to IEC 60529","Trip unit rated current":"400 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) 1.6 x Ir (3t + OSN) No protection (3t)","Protected poles description":"3t 4t 3t + N/2 3t + OSN","Earth-leakage protection class":"Class A","Trip unit protection functions":"LSIR","[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":"160...400 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":"4800 A Compact NSX630 1.5...12 x In Compact NSX400","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 150 ms 500 ms 1 s 0 ms","[IΔn] earth-leakage protection sensitivity adjustment range":"1 A 500 mA 3 A 300 mA 10 A 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2,667.52","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/31996fa1bfba0b6aed9538c9d5d7f707.pdf","sourceUrl":"https://www.se.com/uk/en/product/LV433952/trip-unit-micrologic-7-3-e-for-compact-nsx-400-630-circuit-breakers-electronic-rating-400a-4-poles-4d/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LV433952/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV433952","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/LV433952 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}