{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18557","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18557","canonicalUrl":"https://aoctrl.com/schneider/A9N18557","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18557","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 Vigi C120, A9N18557, add-on residual current device, 2P, 125 A, Type A-SI, selective, 1000 mA, 230…415 V AC.","salesMarkdown":"The Schneider Electric A9N18557 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 the downstream circuit without requiring a separate enclosure or additional DIN-rail space — the unit mounts directly to the load-side terminals of the upstream device via the screw connection. Rated at 125 A on a 230…415 V AC 50 Hz network, this 2-pole device is intended for outgoer group incomer positions. The residual current protection class is Type A-SI (Super Immunised). Type A detects AC sinusoidal and pulsating DC fault currents; the SI suffix adds immunity to high-frequency leakage from variable-speed drives, UPS systems, or LED drivers that would otherwise cause nuisance tripping on a standard Type A device. This makes the A9N18557 a practical choice for commercial or light-industrial panels where non-linear loads are present. The unit occupies 7 modules of 9 mm pitch, so the total width on the rail is 63 mm — the 117 mm overall width includes the overhang of the terminal housing. Depth is 73 mm, height 95 mm. Tunnel-type terminals accept 1…35 mm² flexible or 1…50 mm² rigid conductors. The rated impulse withstand voltage is 6 kV, and the rated insulation voltage is 500 V AC 50/60 Hz per IEC 60947-1. ## Standards and lifecycle These figures cover most indoor panel environments without derating, though the upper operating limit of 60 °C should be checked against the internal panel temperature rise if the device is mounted near high-current busbars or transformers.","metaTitle":"Schneider Electric A9N18557 Acti9 Vigi C120, 2P 125A RCD, Ty","metaDescription":"Schneider Electric A9N18557 Acti9 Vigi C120 add-on RCD. 2P, 125A rated current, 1000 mA sensitivity, Type A-SI (Super Immunised), selective. 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":"117 mm","title":"A9N18557","Colour":"White","Height":"95 mm","Standards":"EN 61009 IEC/EN 61009-2-1","description":"Add-on residual current device, Acti9 Vigi C120, 2P, 125A, A-SI type, selective, 1000mA, 230...415VAC","9 Mm Pitches":"7","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":"2P","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":"1000 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":"Selective","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/a07bb81d0d6adf41f07e3bdb0db18f17.pdf","sourceUrl":"https://www.se.com/sa/en/product/A9N18557/addon-residual-current-device-acti9-vigi-c120-2p-125a-asi-type-selective-1000ma-230-415vac/"},"ai":{"faq":[{"question":"What is the A9N18557 used for?","answer":"It is an add-on residual current device (RCD) that clips onto the load side of a compatible Acti9 MCB or switch-disconnector to provide earth-leakage protection. With a 125 A rating, 1000 mA sensitivity, Type A-SI (Super Immunised) characteristic, and selective time delay, it is suited for main incoming or sub-main positions in distribution boards where coordination with downstream RCDs is required and where non-linear loads (VSDs, UPS, LED) are present."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18557","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/A9N18557 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}}