{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18579","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18579","canonicalUrl":"https://aoctrl.com/schneider/A9N18579","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18579","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 Vigi C120, add-on residual current device block, 4P, 125 A, 300 mA Type A earth-leakage, voltage independent, clip-on DIN rail mount.","salesMarkdown":"The Schneider Electric A9N18579 is an Acti9 Vigi C120 add-on residual current device block — 4 poles, rated 125 A continuous, with a 300 mA Type A earth-leakage sensitivity. It clips onto a 35 mm symmetrical DIN rail and connects electrically to the companion MCB via screw terminals (tunnel type, accepting 1–50 mm² rigid or 1–35 mm² flexible). This is a voltage-independent residual current tripping block, meaning it detects leakage current without needing an external power supply to the electronics — the trip mechanism derives its energy from the fault current itself, which is a reliability advantage in installations where a loss of supply could otherwise blind an electronic RCD. The 125 A rated current (In) sets the continuous load capacity — sized for high-current outgoing feeders or group incomers in a distribution board. Voltage-independent tripping means the block works regardless of whether the upstream MCB is closed; it does not rely on an auxiliary supply. The 4P configuration protects all poles (, L2, L3, N) simultaneously. The 6 kV impulse withstand voltage (Uimp) confirms it coordinates with standard distribution system surge levels. ## Deployment context The 9 mm pitch count of 10 (198 mm width total) tells you the panel fill factor — it occupies ten module positions on the rail. IP20 finger-safe terminals suit enclosed panels; no washdown rating. Mechanical durability of 20,000 cycles reflects the expected switching life under normal operation. The A9N18579 carries an Active lifecycle status from Schneider Electric. It is a current-production part within the Acti9 range. For BOM-line commitment, the key fit criteria are the 125 A rating, 4P configuration, 300 mA Type A sensitivity, and voltage-independent tripping — confirm these match your existing Vigi C120 / Acti9 MCB companion device before ordering.","metaTitle":"Schneider Electric A9N18579 Vigi C120, 4P 125A 300mA Type A","metaDescription":"Schneider Electric A9N18579 Vigi C120 add-on RCD block, 4P, 125A rated current, 300 mA Type A earth leakage, voltage independent, EN 61009. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"73 mm","Range":"Acti9","Width":"198 mm","title":"A9N18579","Colour":"White","Height":"95 mm","Standards":"EN 61009 IEC/EN 61009-2-1","description":"Vigi C120 - earth leakage add-on block - 4P - 300 mA - class A","9 Mm Pitches":"10","Network type":"AC","Product name":"Acti9 Vigi C120","Mounting mode":"Clip-on","lifecycle_stage":"current","Mounting support":"35 mm symmetrical DIN rail","Pollution degree":"3 conforming to IEC 60947-2","Device short name":"Vigi C120","Network frequency":"50/60 Hz","Poles description":"4P","Tightening torque":"3.5 N.m","[In] rated current":"125 A","Mechanical durability":"20000 cycles","Wire stripping length":"15 mm","Connections - terminals":"Tunnel type terminals 1...35 mm² flexible Tunnel type terminals 1...50 mm² rigid","IP degree of protection":"IP20","Device location in system":"Outgoer Group incomer","Earth-leakage sensitivity":"300 mA","Product or component type":"Add-on residual current device","Electrical connection to mcb":"By screws","[Ui] rated insulation voltage":"500 V AC 50/60 Hz conforming to IEC 60947-1","Earth-leakage protection class":"Type A","[Ue] rated operational voltage":"230...415 V AC 50/60 Hz","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 IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e099397b4a9e7c301299f59b90b0081f.pdf","sourceUrl":"https://www.se.com/nz/en/product/A9N18579/vigi-c120-earth-leakage-addon-block-4p-300-ma-class-a/"},"ai":{"faq":[{"question":"Where can I buy A9N18579 and how is it quoted?","answer":"The A9N18579 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of A9N18579?","answer":"Rated current 125 A, 4 poles, 300 mA instantaneous Type A earth-leakage sensitivity, voltage-independent tripping, rated operational voltage 230–415 V AC 50/60 Hz, clip-on 35 mm DIN rail mount."},{"question":"What compliance standards does A9N18579 meet?","answer":"The A9N18579 is certified to EN 61009 and IEC/EN 61009-2-1. It also meets pollution degree 3 per IEC 60947-2 and impulse withstand voltage 6 kV per IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18579","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/A9N18579 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}}