{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21466","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21466","canonicalUrl":"https://aoctrl.com/schneider/A9N21466","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21466","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Prodis Vigi DT40 add-on residual current device, A9N21466, 3P, 40 A, 30 mA, Type A-SI (Super Immunised), voltage independent, clip-on DIN rail, IP20.","salesMarkdown":"The Schneider Electric A9N21466 is a Prodis Vigi DT40 add-on residual current device — a 3-pole, 40 A unit with 30 mA earth-leakage sensitivity, designed to clip onto the outgoing side of a compatible MCB. It's voltage-independent, meaning the trip mechanism doesn't rely on the line voltage to detect a fault; it'll still clear a ground leak even if the phase voltage collapses. Type A-SI (Super Immunised) protection handles pulsed DC fault currents and resists nuisance tripping from high-frequency harmonics or switching transients common on modern electronic loads. This part is officially obsolete per the manufacturer's lifecycle record. There's no listed direct successor order code in the evidence, so a parametric cross-reference is the route forward. Rated at 40 A and 400 V AC phase-to-phase, it's sized for a 3-phase outgoing feeder on a 50 Hz network. The 30 mA sensitivity is standard for personnel protection (shock hazard) per most wiring codes. Pollution degree 3 (conforming to EN 61009-1) means it's rated for the conductive-dust and humidity environment you'd find in an industrial panel, not a clean office. The IP20 finger-safe housing is fine inside a closed enclosure — no washdown rating, so mount it behind a sealed gland plate if the panel sees hosedown. Clip-on mounting to DIN rail, 3-pole width. The 54 mm width and 69 mm depth fit a standard 4-module DIN space (9 mm pitch per pole). Terminal capacity accepts 0.75…16 mm² rigid or 0.33…10 mm² flexible cable; strip 13 mm, torque to 2 N·m. Electrical connection to the upstream MCB is by screws — it's a mechanical add-on, not a standalone device, so verify the MCB's terminal interface is compatible. ## Environmental and durability specs Rated for -25…60 °C operating ambient, -40…60 °C storage. 95 % RH at 55 °C with tropicalisation level 2 per IEC 60068-1 — that passes the 28-day damp-heat cycle, so it's fine for coastal or high-humidity plant rooms. Electrical durability is 10,000 cycles, which is typical for a residual current block on a distribution feeder. Impulse withstand is 6 kV per EN 61009-1, covering most surge environments up to 2000 m altitude.","metaTitle":"Schneider Electric A9N21466 Vigi DT40 3P 40A 30mA Add-on RCD","metaDescription":"Schneider Electric A9N21466 Prodis Vigi DT40 add-on RCD, 3P, 40A, 30mA Type A-SI. Obsolete (L1). Sourced to order against RFQ. EN 61009-1. IP20. Clip-on DIN rail.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"69 mm","Range":"Prodis","Width":"54 mm","Colour":"White","Height":"81 mm","Standards":"EN 61009-1 EN 61009-2-1","9 Mm Pitches":"4","Network type":"AC","Mounting mode":"Clip-on","Tropicalisation":"2 conforming to IEC 60068-1","lifecycle_stage":"current","Local signalling":"ON/OFF indication","Mounting support":"DIN rail","Pollution degree":"3 conforming to EN 61009-1","Device short name":"Vigi DT40","Network frequency":"50 Hz","Poles description":"3P","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Operating altitude":"2000 m","[In] rated current":"40 A","Electrical durability":"10000 cycles","Wire stripping length":"13 mm","Connections - terminals":"Cable downstream 0.75...16 mm² rigid Cable downstream 0.33...10 mm² flexible","IP degree of protection":"IP20 conforming to IEC 60529","Device location in system":"Outgoer","Earth-leakage sensitivity":"30 mA","Product or component type":"Add-on residual current device","Electrical connection to mcb":"By screws","[Ui] rated insulation voltage":"400 V AC 50 Hz conforming to EN 61009-1","Earth-leakage protection class":"Type A-SI (Super Immunised)","[Ue] rated operational voltage":"400 V AC 50 Hz phase to phase","Ambient air temperature for storage":"-40...60 °C","Earth-leakage protection time delay":"Instantaneous","Residual current tripping technology":"Voltage independent","Ambient air temperature for operation":"-25...60 °C","[Uimp] rated impulse withstand voltage":"6 kV conforming to EN 61009-1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/89270e7c6ef4aaa58128fd4e363b38dd.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21466/prodis-earth-leakage-addon-block-vigi-dt40-3p-40a-30ma/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21466/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the A9N21466?","answer":"It's a 3-pole add-on RCD rated at 40 A, 30 mA earth-leakage sensitivity, Type A-SI (Super Immunised), voltage-independent trip, for 400 V AC phase-to-phase 50 Hz networks. Complies with EN 61009-1 and EN 61009-2-1. IP20, clip-on DIN rail."},{"question":"What compliance documentation does this brand provide for A9N21466?","answer":"The part is certified to EN 61009-1 and EN 61009-2-1. It carries a pollution degree 3 rating and tropicalisation level 2 per IEC 60068-1. For specific RoHS/REACH/UL declarations, the manufacturer's documentation package is available through the supply channel at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21466","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/A9N21466 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}}