{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9F05303","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9F05303","canonicalUrl":"https://aoctrl.com/schneider/A9F05303","factsUrl":"https://aoctrl.com/api/mcp/products/A9F05303","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 iC60N, miniature circuit breaker, 3 A, D curve, 3P, 50 kA Icu at 415 V AC, DIN rail, IP20.","salesMarkdown":"The A9F05303 is a Schneider Electric Acti9 iC60N miniature circuit breaker rated 3 A with a D curve, meaning the magnetic trip threshold is 12 x In ±20 % — so it holds through motor inrush without nuisance tripping, then clears hard faults fast. The 50 kA Icu at 415 V AC (per EN/IEC 60947-2) gives headroom for high-fault panels; the same unit also carries a 6 kA Icn at 400 V under EN/IEC 60898-1 for residential or light commercial coordination. Three poles, thermal-magnetic trip, overvoltage category IV — sized for distribution boards where the upstream transformer is close. Snaps onto a DIN rail (6 x 9 mm pitches), 54 mm wide, 91 mm tall, 78.5 mm deep. Double terminals top and bottom accept 1–25 mm² rigid or 1–16 mm² flexible; wire strip length 14 mm, torque to 2 N·m. ## D-curve selectivity and the so-what The D curve (12 x In magnetic trip) is the key differentiator from a C curve (5–10 x In) or B curve (3–5 x In). For a 3 A MCB, that means the magnetic release fires between 28.8 A and 43.2 A — high enough to pass the starting surge of a small motor or transformer, low enough to protect the downstream cable. If your BOM calls for a D-curve 3 A MCB, swapping in a C curve risks nuisance trips on every start; swapping in a B curve risks the same plus inadequate short-circuit protection for the load. Dual-certified to EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (residential/ commercial). Pollution degree 3, suitability for isolation marked on both standards. Separate earth-leakage block available if needed.","metaTitle":"Schneider Electric A9F05303 Acti9 iC60N MCB, 3A D Curve, 3P","metaDescription":"Schneider Electric A9F05303 Acti9 iC60N miniature circuit breaker, 3 A rated current, D curve, 3 poles, 50 kA Icu breaking capacity at 415 V AC. DIN rail mount, IP20. Sourced to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"78.5 mm","Range":"Acti9","Width":"54 mm","Colour":"White","Height":"91 mm","Standards":"EN/IEC 60947-2 EN/IEC 60898-1","Curve code":"D","9 Mm Pitches":"6","Control type":"Toggle","Network type":"AC DC","Product name":"Acti9 iC60","Tropicalisation":"2 conforming to IEC 60068-1","lifecycle_stage":"current","Limitation class":"3 conforming to EN/IEC 60898-1","Local signalling":"Trip indicator","Mounting support":"DIN rail","Pollution degree":"3 conforming to EN/IEC 60947-2","Breaking capacity":"50 kA Icu at 12...133 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA Icu at 220...240 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA Icu at 380...415 V AC 50/60 Hz conforming to EN/IEC 60947-2 25 kA Icu at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 10 kA Icu at 6000 A Icn at 400 V AC 50/60 Hz conforming to EN/IEC 60898-1","Device short name":"IC60N","Network frequency":"50/60 Hz","Poles description":"3P","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m top or bottom","Device application":"Distribution","[In] rated current":"3 A","Overvoltage category":"IV","Trip unit technology":"Thermal-magnetic","Utilisation category":"Category A conforming to EN/IEC 60947-2","Electrical durability":"10000 cycles","Mechanical durability":"20000 cycles","Wire stripping length":"14 mm for top or bottom connection","Connections - terminals":"Double terminal (top or bottom) 1...25 mm² rigid Double terminal (top or bottom) 1...16 mm² flexible","IP degree of protection":"IP20 conforming to IEC 60529","Magnetic tripping limit":"12 x In +/- 20 %","Earth-leakage protection":"Separate block","Number of protected poles":"3","Product or component type":"Miniature circuit-breaker","Suitability for isolation":"Yes conforming to EN/IEC 60898-1 Yes conforming to EN/IEC 60947-2","Contact position indicator":"Yes","[Ui] rated insulation voltage":"500 V AC 50/60 Hz conforming to EN/IEC 60947-2","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-35...70 °C","[Ics] rated service breaking capacity":"50 kA 100 % conforming to EN/IEC 60947-2 - 12...133 V AC 50/60 Hz 50 kA 100 % conforming to EN/IEC 60947-2 - 220...240 V AC 50/60 Hz 50 kA 100 % conforming to EN/IEC 60947-2 - 380...415 V AC 50/60 Hz 25 kA 100 % conforming to EN/IEC 60947-2 - 440 V AC 50/60 Hz 10 kA 100 % conforming to EN/IEC 60947-2 - <= 180 V DC","[Uimp] rated impulse withstand voltage":"6 kV conforming to EN/IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6ca2bd4667df2164a586e7091b089afd.pdf","sourceUrl":"https://www.se.com/sg/en/product/A9F05303/miniature-circuit-breaker-mcb-acti9-ic60n-3p-3a-d-curve-6000a-iec-608981-50ka-iec-609472-double-term-/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9F05303/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of A9F05303?","answer":"50 kA Icu at 415 V AC per EN/IEC 60947-2, and 6 kA Icn at 400 V per EN/IEC 60898-1. The full voltage-dependent table: 50 kA at 12–133 V, 50 kA at 220–240 V, 50 kA at 380–415 V, 25 kA at 440 V, and 10 kA at 6000 A Icn at 400 V."},{"question":"Where can I buy A9F05303 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial response."},{"question":"What standards does A9F05303 comply with?","answer":"Certified to EN/IEC 60947-2 and EN/IEC 60898-1. Pollution degree 3, overvoltage category IV, tropicalisation class 2, limitation class 3. Suitable for isolation per both standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9F05303","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/A9F05303 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}}