{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4203-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4203-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4203-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4203-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4203-7RC, miniature circuit breaker, 2-pole, C characteristic, 3 A rated current, 10 kA breaking capacity at 415 V AC, 1 MW width.","salesMarkdown":"## What it is and what it does The Siemens 5SL4203-7RC is a SENTRON miniature circuit breaker (MCB) — a 2-pole unit rated 3 A with a C trip characteristic, breaking 10 kA at 415 V AC per EN 60898. That C-curve means it trips between 5× and 10× rated current, so it handles moderate inrush from small motor loads or lighting ballasts without nuisance tripping, but still clears a hard short fast enough to protect downstream wiring. The 10 kA SCCR at 415 V is the standard residential/commercial distribution board rating — it interrupts fault currents up to that level without welding contacts or cascading upstream. ## Panel fit and integration Snaps onto standard DIN rail — 1 MW (18 mm wide) per pole, so this 2-pole unit takes exactly 18 mm of rail space. Depth is 76 mm; installation depth 70 mm, meaning the body clears a 70 mm deep enclosure back wall. Mounts in any position, which simplifies layout in crowded sub-distribution boards. IP20 with connected conductors — fine inside a closed panel, not for washdown zones. ## What the ratings mean for the buyer 3 A at 30 °C and 3 A at AC — no temperature derating at 30 °C ambient, so the full 3 A is available in normal panel conditions. Overvoltage category III (distribution level) and pollution degree 2 (non-conductive dust only) mean it's rated for fixed-installation use in residential and infrastructure panels — not for industrial environments with conductive dust or high humidity. Halogen-free and silicon-free construction matters for clean-room or high-reliability installs where outgassing can contaminate contacts or optics.","metaTitle":"Siemens 5SL4203-7RC SENTRON MCB, 2P C-Curve 3A 10kA 415V","metaDescription":"Siemens 5SL4203-7RC SENTRON miniature circuit breaker, 2-pole, C-curve, 3A, 10kA at 415V AC. Active production, IP20. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL4203-7RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 415 V 10kA, 2-pole, C, 3A","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","Energy Limitation Class":"3","at 30 °C / rated value":"3 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","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":"415 V","Type Of Voltage / Of The Operating Voltage":"AC","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","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=118785&mlfb=5SL4203-7RC"},"ai":{"faq":[{"question":"Where can I buy the 5SL4203-7RC and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What is the closest functional second-source to the 5SL4203-7RC?","answer":"The Siemens 5SY6006-7 is a 1P+N MCB with the same 76 mm depth and 18 mm width, but it is rated 6 A with a 6 kA breaking capacity and includes neutral switching. The 5SL4203-7RC is a 2-pole unit with no neutral switching, so the two are not drop-in replacements — verify the pole count and neutral switching requirement before substituting."},{"question":"Will the 5SL4203-7RC drop into a panel specified around the 5SY6006-7 without rewiring?","answer":"No — the 5SL4203-7RC is a 2-pole breaker without integrated neutral switching, while the 5SY6006-7 is a 1P+N unit that switches the neutral. The physical footprint (76 mm depth, 18 mm width) is identical, but the internal wiring differs: the 5SL4203-7RC requires the neutral to be connected on a separate busbar or terminal, not through the breaker."},{"question":"What compliance documentation does Siemens provide for the 5SL4203-7RC?","answer":"The part carries EN 60898 certification (10 kA breaking capacity at 415 V AC), is rated for overvoltage category III and pollution degree 2, and is halogen-free and silicon-free. Standard Siemens declaration of conformity covers CE marking; check with your Siemens representative for specific UL or other regional certifications if required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4203-7RC","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/5SL4203-7RC 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}}