{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21756","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21756","canonicalUrl":"https://aoctrl.com/schneider/A9N21756","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21756","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Clario series, Vigi DPNc add-on residual current device, A9N21756, 3P+N, 25 A rated current, 300 mA sensitivity, Type AC, voltage-independent, instantaneous trip, obsolete.","salesMarkdown":"The A9N21756 is a Clario-series Vigi DPNc add-on residual current device (RCD) from Schneider Electric, designed as a group incomer for final distribution boards. It provides earth-leakage protection for a 3P+N circuit at 25 A rated current and 300 mA sensitivity, Type AC (sinusoidal AC fault currents only), voltage-independent tripping, instantaneous response. The 400 V AC phase-to-phase operational voltage and 440 V rated insulation voltage suit standard 400/230 V three-phase networks at 50 Hz. The 25 A rated current (In) and 300 mA sensitivity define the protection envelope: this block sits downstream of a 25 A MCB (or smaller) and will trip on leakage above 300 mA. Voltage-independent tripping means the RCD operates without needing a separate power supply; it uses the fault energy itself. The instantaneous time delay (no intentional delay) means it trips within 300 ms at rated residual current, per EN/IEC 61009-1. Clip-on mounting to DIN rail, neutral on the left, 3P+N poles. The add-on block screws directly to the downstream MCB (by screws, per the spec). 54 mm wide, 82 mm tall, 70 mm deep — occupies a standard 3-module width on the rail. Terminals accept 0.75…16 mm² rigid or 0.33…10 mm² flexible cable; strip 13 mm, tighten to 2 N·m. The ON/OFF local signalling gives a visual trip indication. Tropicalisation class 2 (IEC 60068-1) means it withstands damp-heat cycling — relevant for non-air-conditioned plant rooms in humid climates.","metaTitle":"A9N21756 Vigi DPNc Clario RCD Add-On Block, 25A 300mA Obsole","metaDescription":"A9N21756 Clario Vigi DPNc earth leakage add-on block. 3P+N, 25A, 300mA Type AC RCD. Obsolete — sourced to order against RFQ. EN/IEC 61009-1.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Range":"Clario","Width":"54 mm","Colour":"White","Height":"82 mm","Standards":"EN/IEC 61009-1 EN/IEC 61009-2-1","9 Mm Pitches":"6","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","Neutral position":"Left","Pollution degree":"3 conforming to EN/IEC 61009-1","Device short name":"Vigi DPNc","Network frequency":"50 Hz","Poles description":"3P + N","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Operating altitude":"2000 m","[In] rated current":"25 A","Wire stripping length":"13 mm","Connections - terminals":"Cable upstream 0.75...16 mm² rigid Cable upstream 0.33...10 mm² flexible","IP degree of protection":"IP20 conforming to IEC 60529","Device location in system":"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":"440 V AC 50 Hz conforming to EN/IEC 61009-1","Earth-leakage protection class":"Type AC","[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":"-5...60 °C","[Uimp] rated impulse withstand voltage":"4 kV conforming to EN/IEC 61009-1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ce07a2e320c96e2200e78508a5157d05.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21756/clario-earth-leakage-addon-block-vigi-dpnc-3p-+-n-25a-300ma/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21756/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy A9N21756?","answer":"We source and quote the A9N21756 to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What is the closest alternative to A9N21756?","answer":"Schneider Electric has not published a direct successor order code for the A9N21756. The Clario range has been superseded by later platform generations (e.g., Acti 9 iC60 / Vigi iC60 series), but those are not pin-compatible drop-in replacements. A panel redesign is required to move to a current-generation RCD/MCB combination."},{"question":"What standards does A9N21756 comply with?","answer":"The A9N21756 is certified to EN/IEC 61009-1 and EN/IEC 61009-2-1 (residual current operated circuit-breakers with integral overcurrent protection). Rated impulse withstand voltage 4 kV, pollution degree 3, tropicalisation class 2 per IEC 60068-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21756","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/A9N21756 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}}