{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4203-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4203-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SL4203-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4203-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4203-8CC, miniature circuit breaker, 2-pole, D-curve, 3 A, 10 kA interrupting capacity at 400 V AC, 2 modular width units.","salesMarkdown":"## SENTRON 5SL4203-8CC — D-curve 3 A, 2-pole MCB The D-curve means it tolerates inrush spikes typical of motor and transformer loads — expect it to hold through a 10× to 20× rated-current surge for a short duration, so it's a fit for small motor branch circuits or lighting with heavy ballast inrush. ## Where it lands in a panel Installation depth is 70 mm, meaning the body extends that far behind the rail; verify your enclosure depth clearance if you're retrofitting into a shallow box. ## Thermal derating and environmental range At 40 °C it derates to 2.88 A, at 50 °C to 2.75 A, and at 55 °C to 2.69 A. Pollution degree 2 (normal industrial, non-condensing) and overvoltage category III (distribution-level transients) are standard for this class. Rated per EN 60898 (the household/residential MCB standard). The breaker is sealable, halogen-free, and silicon-free — useful for environments sensitive to outgassing, like clean rooms or sealed enclosures. Touch protection is built in (finger-safe terminals when wired).","metaTitle":"Siemens 5SL4203-8CC SENTRON MCB, 2P D 3A, 10kA 400V","metaDescription":"Siemens 5SL4203-8CC SENTRON miniature circuit breaker, 2-pole, D-curve, 3 A, 10 kA at 400 V AC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","acc. to DIN EN 61346-2":"F","at 30 °C / rated value":"3 A","at 40 °C / rated value":"2.88 A","at 45 °C / rated value":"2.82 A","at 50 °C / rated value":"2.75 A","at 55 °C / rated value":"2.69 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Type Of Voltage / Of The Operating Voltage":"AC","vibration resistance / acc. to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz","with multi-phase operation / at AC / maximum":"440 V","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7404ae85aaaa1f58b9c29459ca8938a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=12895&mlfb=5SL4203-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4203-8CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SL4203-8CC and get a price?","answer":"The 5SL4203-8CC is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the interrupting rating of 5SL4203-8CC?","answer":"It has a 10 kA interrupting capacity at 400 V AC per EN 60898. That's the standard fault-current rating for residential and light commercial distribution boards in 400 V three-phase systems."},{"question":"What compliance documentation does Siemens provide for 5SL4203-8CC?","answer":"The breaker is rated per EN 60898 and carries the SENTRON brand. It is halogen-free and silicon-free. For specific declarations (RoHS, REACH, UL), the manufacturer's documentation is available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4203-8CC","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/5SL4203-8CC 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}}