{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18542","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18542","canonicalUrl":"https://aoctrl.com/schneider/A9N18542","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18542","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 Vigi C120, add-on residual current device, A9N18542, 4P, 125A, 30 mA AC type, instantaneous, 400-415 V AC.","salesMarkdown":"The Schneider Electric A9N18542 is an add-on residual current device (RCD) from the Acti9 Vigi C120 range, designed to clip onto the outgoing side of a compatible Acti9 MCB or switch-disconnector. It provides earth-leakage protection for a 4-pole circuit rated at 125 A, with a 30 mA sensitivity and instantaneous trip characteristic. Rated at 125 A continuous and 400-415 V AC, this unit handles the full load current of a large submain or a heavy commercial outgoing group. The instantaneous trip means no intentional delay; it clears a fault within tens of milliseconds, which is appropriate for final circuits but not for selectivity against downstream RCDs. The residual current trip mechanism is voltage-independent — it does not rely on the mains voltage to operate. That means it still trips even if the neutral is lost upstream, a genuine safety advantage over electronic RCDs in TN or TT systems where a broken neutral can otherwise leave the circuit unprotected. The unit is 198 mm wide, which is 10 modules of 9 mm pitch. It connects to the upstream MCB or switch via screws and accepts tunnel terminals up to 50 mm² rigid or 35 mm² flexible. Factor the 198 mm width into your DIN-rail layout — it occupies ten 9 mm slots, so plan the enclosure fill accordingly.","metaTitle":"Schneider Electric A9N18542 Acti9 Vigi C120 4P 125A 30mA RCD","metaDescription":"Schneider Electric A9N18542 Acti9 Vigi C120 add-on RCD, 4P, 125A, 30mA AC type, 400-415V AC. Active production. Sourced to order. Request a quote.","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":"A9N18542","Colour":"White","Height":"95 mm","Standards":"EN 61009 IEC/EN 61009-2-1","description":"Add-on residual current device, Acti9 Vigi C120, 4P, 125A, AC type, instantaneous, 30mA, 400...415VAC","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":"30 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 AC","[Ue] rated operational voltage":"400...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":"-5...60 °C","[Uimp] rated impulse withstand voltage":"6 kV conforming to IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$276.63","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/42b539972d01c103045d1415ce17a444.pdf","sourceUrl":"https://www.se.com/be/en/product/A9N18542/addon-residual-current-device-acti9-vigi-c120-4p-125a-ac-type-instantaneous-30ma-400-415vac/"},"ai":{"faq":[{"question":"Where can I buy the A9N18542 and get a price?","answer":"The A9N18542 is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is the A9N18542's earth-leakage sensitivity and type?","answer":"The A9N18542 has a 30 mA sensitivity, Type AC (sinusoidal AC fault currents only), with instantaneous trip. It is voltage-independent, so it operates even with a lost neutral."},{"question":"What standards does the A9N18542 comply with?","answer":"The A9N18542 complies with EN 61009 and IEC/EN 61009-2-1, and its impulse withstand and pollution degree ratings conform to IEC 60947-2 and IEC 60947-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18542","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/A9N18542 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}}