{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18555","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18555","canonicalUrl":"https://aoctrl.com/schneider/A9N18555","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18555","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 Vigi C120, add-on residual current device, 4P, 125 A, Type A-SI, 300 mA, instantaneous, 230...415 V AC, clip-on 35 mm DIN rail.","salesMarkdown":"The A9N18555 is an add-on residual current device (RCD) from the Acti9 Vigi C120 series, designed to bolt onto the line side of a compatible Acti9 MCB via screw terminals. It is rated for 125 A continuous current on a 4-pole (4P) AC network at 230...415 V, 50 Hz. The 300 mA earth-leakage sensitivity with Type A-SI (Super Immunised) classification means it handles pulsed DC fault currents and resists nuisance tripping from high-frequency harmonics — common on VFD-fed or UPS-backed circuits. The instantaneous time delay clears faults without intentional lag, so coordination with downstream RCDs needs a check on selectivity. The voltage-independent tripping technology means the device does not need an external power supply to open on a residual fault — it uses the fault current itself to energise the trip solenoid. That makes it inherently fail-safe on a lost neutral or phase dropout, which matters for circuits where continuity of protection is critical. The 198 mm width across 10 x 9 mm pitches means it occupies ten modular spaces in the enclosure — plan the DIN rail fill factor accordingly. Tunnel-type terminals accept 1...50 mm² rigid or 1...35 mm² flexible cable; strip length is 15 mm, tighten to 3.5 N·m. The screw connection to the adjacent MCB is a mechanical and electrical link — no extra busbar needed, but the MCB must be from the same Acti9 C120 family. IP20 finger protection on the terminals; the device is intended for enclosed panel installation, not open washdown areas.","metaTitle":"Schneider Electric A9N18555 Acti9 Vigi C120, 4P 125A RCD, Ty","metaDescription":"Schneider Electric A9N18555 Acti9 Vigi C120 add-on RCD, 4P, 125A, Type A-SI, 300mA, instantaneous. Active lifecycle. Sourced to order. Quoted on request.","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":"A9N18555","Colour":"White","Height":"95 mm","Standards":"EN 61009 IEC/EN 61009-2-1","description":"Add-on residual current device, Acti9 Vigi C120, 4P, 125A, A-SI type, instantaneous, 300mA, 230...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 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-SI (Super Immunised)","[Ue] rated operational voltage":"230...415 V AC 50 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/57aef05494197c8e9245488a3b8c9559.pdf","sourceUrl":"https://www.se.com/ie/en/product/A9N18555/addon-residual-current-device-acti9-vigi-c120-4p-125a-asi-type-instantaneous-300ma-230-415vac/"},"ai":{"faq":[{"question":"Where can I buy A9N18555 and get a price?","answer":"The A9N18555 is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the closest alternative to A9N18555 in the Acti9 family?","answer":"Within the Acti9 Vigi C120 range, the closest sibling is the same device in a different pole count or sensitivity rating — for example, a 2P or 125 A 30 mA variant. The form factor, mounting, and terminal specs are shared; the delta is the number of protected poles and the leakage threshold. No pin-compatible third-party equivalent exists — the screw-link interface to the Acti9 MCB is proprietary to Schneider."},{"question":"What compliance standards does A9N18555 meet?","answer":"The A9N18555 is certified to EN 61009 and IEC/EN 61009-2-1 for residual current circuit breakers with integral overcurrent protection (when paired with the matching MCB). It also conforms to IEC 60947-2 for the insulation and impulse withstand ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18555","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/A9N18555 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}}