{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9L8F451","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9L8F451","canonicalUrl":"https://aoctrl.com/schneider/A9L8F451","factsUrl":"https://aoctrl.com/api/mcp/products/A9L8F451","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 iPRD, Type 2+3 surge arrester, 1P+N, 230/240 V AC, 20 kA nominal discharge current (L/N), 25 kA short-circuit withstand, plug-on mounting, white (RAL 9003).","salesMarkdown":"It covers a single phase (1P+N) at 230/240 V AC, 50/60 Hz. The 20 kA nominal discharge current per differential mode (L/N) and 40 kA common mode (N/PE) mean it handles direct lightning-induced surges on a service entrance or sub-distribution board, not just switching transients. The 25 kA short-circuit withstand ensures the device clears a fault without rupturing upstream — critical for coordination in a panel where the main breaker is sized above that level. The Type 2 + 3 classification tells you this arrester handles both main incoming surges (Type 2 at the sub-distribution board) and equipment-level protection (Type 3 close to the load) in one unit — no need for a separate fine-protection stage downstream. The MOV + GDT technology combines a metal-oxide varistor for clamping with a gas discharge tube for follow-current extinction; the GDT handles the 100 A common-mode follow current that would otherwise stress a MOV alone. Response time under 25 ns on L/N and under 100 ns on N/PE means it catches fast-rising transients — the kind that damage switch-mode power supplies and electronics before a slower arrester reacts. Temporary overvoltage (TOV) withstand is a real differentiator: 337 V L/N for 5 seconds before failure, and 442 V L/N for 120 minutes in safe failure mode. That means the arrester survives a neutral shift or back-feed from a generator long enough for protection to clear, rather than venting immediately. The N/PE path handles 1200 V for 200 ms — a direct lightning strike to the PEN conductor. If you are specifying for a site with weak utility regulation or generator backup, this TOV curve is the spec that keeps the arrester from becoming the failure point. The pluggable cartridge lets you replace the MOV/GDT module without rewiring the base — a maintenance spare you can swap in under a minute while the board stays live upstream. Local signalling uses a green flag for operating state and red for fault; remote signalling contacts rated 1 A/250 V AC allow a PLC or building management system to log the failure. Tested to IEC 61643-11:2011 and BS EN 61643-11:2012+A11:2018. UKCA marked for the UK market.","metaTitle":"Schneider Electric A9L8F451 Acti9 iPRD Type 2+3 Surge Arrest","metaDescription":"Schneider Electric A9L8F451 Acti9 iPRD Type 2+3 surge arrester, 1P+N, 230/240 V AC, 20 kA nominal discharge current, 25 kA SCCR. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Surge Protection Devices (SPD)"],"specifications":{"Depth":"85 mm","Width":"18 mm","title":"A9L8F451","Colour":"White (RAL 9003)","Height":"129 mm","Material":"Thermoplastic","Standards":"IEC 61643-11:2011 BS EN 61643-11:2012+A11:2018","description":"Surge arrester with pluggable cartridge, Acti9 iPRD F40r, 1P+N, 20kA, type 2+3, with fuse, with remote monitoring","9 Mm Pitches":"2","Product name":"Acti9 iPRD","Mounting mode":"Plug-on (chassis)","Response time":"< 25 ns L/N < 100 ns N/PE","Quality labels":"UKCA","Earthing system":"TT TN-S TN-C-S","lifecycle_stage":"current","Condition of use":"Fuse (integrated)","Local signalling":"Operating state: flag (green) Fault indication: flag (red)","Range Of Product":"Acti9","Targeted country":"United Kingdom","Device short name":"iPRD F40r","Poles description":"1P + N","Relative humidity":"5...95 %","Remote signalling":"With","Tightening torque":"Remote control: 0.2...0.25 N.m Power terminals: 3.5 N.m Earthing terminal: 2 N.m","Device application":"Distribution","Operating altitude":"0...2000 m","Cable cross section":"0.14...1.5 mm² solid cable for remote control 6...25 mm² solid stranded cable for power terminals 6...16 mm² flexible cable for power terminals 6...16 mm² solid stranded cable for earthing terminal 6...10 mm² flexible cable for earthing terminal","Surge arrester type":"Electrical distribution network","[Ifi] follow current":"100 A common mode N/PE","Wire stripping length":"Remote control: 10 mm Power terminals: 14 mm Earthing terminal: 14 mm","IK degree of protection":"IK05","IP degree of protection":"IP20 with device wired","Short-circuit withstand":"25 kA","Maximum discharge current":"Differential mode: 40 kA L/N Common mode: 65 kA N/PE","Nominal discharge current":"Differential mode: 20 kA (L/N) Common mode: 40 kA (N/PE)","Product or component type":"Surge arrester with pluggable cartridge","Surge arrester class type":"Type 2 + 3","Surge arrester technology":"MOV + GDT","Signalling circuit voltage":"1 A/250 V AC 1 A/125 V AC 0.5 A/48 V DC 0.5 A/24 V DC 0.5 A/12 V DC 0.01 A/5 V DC","[Uoc] open circuit voltage":"6000 V differential mode L/N 6000 V common mode N/PE","[Ut] temporary overvoltage":"337 V L/N 5 s withstand 1200 V N/PE 200 ms withstand 442 V L/N 120 min safe failure mode","[Ue] rated operational voltage":"230/240 V AC at 50/60 Hz","Ambient air temperature for operation":"-40...85 °C","Maximum [Up] voltage protection level":"Differential mode Common mode <1.5 kV N/PE","[Uc] maximum continuous operating voltage":"Differential mode: 340 V L/N Common mode: 305 V N/PE"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/uk/en/product/A9L8F451/surge-arrester-with-pluggable-cartridge-acti9-iprd-f40r-1p+n-20ka-type-2+3-with-fuse-with-remote-monitoring/"},"ai":{"faq":[{"question":"What is the nominal discharge current of A9L8F451?","answer":"The nominal discharge current is 20 kA differential mode (L/N) and 40 kA common mode (N/PE). Maximum discharge current is 40 kA L/N and 65 kA N/PE."},{"question":"What earthing systems does A9L8F451 support?","answer":"It supports TT, TN-S, and TN-C-S earthing systems, which covers the vast majority of UK and European distribution installations."},{"question":"What compliance documentation does Schneider provide for A9L8F451?","answer":"The device is tested to IEC 61643-11:2011 and BS EN 61643-11:2012+A11:2018, and carries UKCA marking. Standard Schneider documentation includes a declaration of conformity and test reports per those standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9L8F451","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/A9L8F451 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}}