{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9F05403","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9F05403","canonicalUrl":"https://aoctrl.com/schneider/A9F05403","factsUrl":"https://aoctrl.com/api/mcp/products/A9F05403","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 iC60N miniature circuit breaker, A9F05403, 4P, D curve, 3 A, 50 kA breaking capacity, DIN rail mount.","salesMarkdown":"The Schneider Electric A9F05403 is a 4-pole Acti9 iC60N miniature circuit breaker rated at 3 A with a D tripping curve. It's built to protect branch circuits in distribution panels, mounted on a standard DIN rail. The D curve means the magnetic trip fires at 10 to 20 times rated current — that's 30 to 60 A for this 3 A unit — so it's sized for loads with a high inrush, like small motors, transformers, or solenoid banks, where a B or C curve would nuisance-trip on startup. Rated at 3 A, this is a low-current branch breaker. Let me show you why that matters: on a 4-pole frame, you're protecting all three phases plus neutral on a 3-phase 4-wire system, or using the fourth pole as a switched neutral. The 3 A rating limits it to very light loads — think control transformers under 1 kVA, small pilot circuits, or instrumentation supplies. Don't try to hang a motor starter on this; the inrush alone would hold it in the magnetic region. Breaking capacity on this breaker is 50 kA Icu at 220-415 V AC per EN/IEC 60947-2, and 10 kA Icn at 400 V per EN/IEC 60898-1. The dual standard (60947-2 for industrial and 60898-1 for residential/commercial) means it's certified for both distribution boards and industrial switchgear. The 10 kA Icn at 400 V is the domestic rating; the 50 kA Icu is the industrial one. If your panel's fault current at the breaker terminals is under 10 kA, either standard covers you. Above that, you rely on the 60947-2 rating. Overvoltage category IV puts it at the service entrance or main distribution board, not downstream sub-panels. The thermal-magnetic trip unit gives you both overload protection (thermal bimetal, slow response) and short-circuit protection (magnetic solenoid, instantaneous at 12 x In ±20%, so 36 A ±7.2 A). ## Mounting and wiring — what to expect on the rail The 4-pole body takes 8 x 9 mm pitches of rail space — that's 72 mm wide. Depth is 78.5 mm, height 91 mm. Strip length is 14 mm. The toggle actuator is manual with a trip-indicator flag that shows a red band when the breaker has tripped — useful for panel troubleshooting without a meter. IP20 finger protection on the front means it's safe for open-panel use as long as no water gets near it. For washdown environments, you'd need an enclosure. The white color is standard for Schneider's Acti9 residential-commercial line — if your panel spec calls for grey or black, flag it now because this one is white.","metaTitle":"Schneider Electric A9F05403 Acti9 iC60N MCB, D Curve, 3 A, 4","metaDescription":"Schneider Electric A9F05403 Acti9 iC60N miniature circuit breaker, 3 A rated current, D curve, 4 poles, 50 kA breaking capacity, DIN rail mount. Sourced to order against RFQ.","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":"72 mm","Colour":"White","Height":"91 mm","Standards":"EN/IEC 60947-2 EN/IEC 60898-1","Curve code":"D","9 Mm Pitches":"8","Control type":"Toggle","Network type":"DC AC","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":"4P","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":"4","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 - <= 250 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/5b9a6e566ecf9633aa5d2fe7a959024d.pdf","sourceUrl":"https://www.se.com/sg/en/product/A9F05403/miniature-circuit-breaker-mcb-acti9-ic60n-4p-3a-d-curve-6000a-iec-608981-50ka-iec-609472-double-term-/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9F05403/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the A9F05403 and how do I get a price?","answer":"We source the A9F05403 to order against an RFQ through independent distribution. Submit a request for quote and we will confirm availability and current pricing at quote time."},{"question":"What is the A9F05403's breaking capacity?","answer":"The A9F05403 has a breaking capacity of 50 kA Icu at 220-415 V AC per EN/IEC 60947-2, and 10 kA Icn at 400 V per EN/IEC 60898-1."},{"question":"What compliance documentation does Schneider provide for the A9F05403?","answer":"The A9F05403 is certified to EN/IEC 60947-2 and EN/IEC 60898-1. It carries a pollution degree 3 rating and overvoltage category IV. Tropicalisation class 2 per IEC 60068-1 is also listed. For specific RoHS/REACH/UL declarations, request the manufacturer's compliance documentation with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9F05403","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/A9F05403 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}}