{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6303-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6303-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6303-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6303-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6303-7 miniature circuit breaker, 3-pole, C-curve, 3 A, 6 kA breaking capacity per EN 60898 and IEC 60947-2, 400 V AC, 3 MW units.","salesMarkdown":"## What it is and what it does The Siemens 5SL6303-7 is a SENTRON miniature circuit breaker — a 3-pole, C-curve unit rated at 3 A with a 6 kA breaking capacity under both EN 60898 and IEC 60947-2. That 6 kA figure means it can safely interrupt fault currents up to 6 kiloamperes without welding its contacts or cascading failure upstream, which is the standard for residential and light commercial distribution boards. The C-curve trips between 5 and 10 times rated current, so it handles moderate inrush from small motor loads or lighting ballasts without nuisance tripping. ## Where it fits and how it mounts Snaps onto a standard DIN rail — 3 modular width units (54 mm wide) — and accepts supplementary devices like shunt trips or auxiliary contacts. Mounting position is unrestricted, and the 70 mm installation depth leaves clearance behind the panel door. Rated IP20 with connected conductors, so it belongs inside a closed enclosure, not exposed to washdown.","metaTitle":"Siemens 5SL6303-7 SENTRON MCB, 3P C 3A, 6kA","metaDescription":"Siemens 5SL6303-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 3 A, 6 kA breaking capacity per EN 60898/IEC 60947-2. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"6 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e28fb75413fb54314f53a14e2d28f4be.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=132380&mlfb=5SL6303-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6303-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SL6303-7 and how do I get a price?","answer":"The 5SL6303-7 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 5SL6303-7's listed depth?","answer":"The 5SL6303-7 has a depth of 76 mm and an installation depth of 70 mm."},{"question":"What is 5SL6303-7's listed width?","answer":"The 5SL6303-7 has a width of 54 mm, which corresponds to 3 modular width units on a DIN rail."},{"question":"Will 5SL6303-7 drop into a panel specified around 5SL4363-7 without rewiring?","answer":"Yes — both share the same 54 mm width, 76 mm depth, 90 mm height, DIN-rail mounting, and 3-pole form factor, so the 5SL6303-7 is a drop-in replacement. The key difference is breaking capacity: 6 kA versus 10 kA on the 5SL4363-7, so verify the available fault current at the panel."},{"question":"What compliance documentation does Siemens provide for 5SL6303-7?","answer":"The 5SL6303-7 is rated per EN 60898 and IEC 60947-2, and carries a pollution degree 2 and overvoltage category III classification. It is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6303-7","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SL6303-7 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}}