{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3203-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3203-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL3203-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3203-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3203-7MB, miniature circuit breaker, 2-pole, C characteristic, 3 A, 400 V AC, 4.5 kA breaking capacity per EN 60898, 2 MW units width.","salesMarkdown":"The Siemens SENTRON 5SL3203-7MB is a 2-pole miniature circuit breaker rated 3 A at 400 V AC, with a C tripping characteristic and a 4.5 kA breaking capacity per EN 60898. Rated for single-phase operation up to 250 V AC and multi-phase up to 440 V AC. The 72 V DC maximum rating covers control-circuit applications on 48 V or 60 V DC buses, though the primary duty is AC branch-circuit protection. Width of 36 mm (2 MW) and depth of 76 mm (70 mm behind panel surface). No neutral switching on this 2-pole unit — it switches both phase conductors but does not break the neutral. Touch protection is built in (finger-safe terminals when wired). Halogen-free and silicon-free construction avoids corrosive off-gassing in confined enclosures. Mechanical service life of 10 000 switching cycles typical — adequate for branch-circuit protection where the breaker is not used as a daily disconnect. For frequent switching duty, consider a dedicated switch or contactor upstream.","metaTitle":"Siemens 5SL3203-7MB SENTRON MCB, 2P C 3A 4.5 kA","metaDescription":"Siemens SENTRON 5SL3203-7MB miniature circuit breaker, 2-pole, C-curve, 3 A rated at 400 V AC, 4.5 kA breaking capacity per EN 60898. 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","title":"5SL3203-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 4.5 kA, 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","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"No","according to EN 61346-2":"F","at 30 °C / rated value":"3 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"4.5 kA","supply voltage / at AC / rated value":"400 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/6acf5e0d885a597c47911fea313a76df.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=435548&mlfb=5SL3203-7MB"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL3203-7MB?","answer":"4.5 kA per EN 60898 at 400 V AC. This is the maximum prospective fault current the breaker can safely interrupt under standard conditions."},{"question":"Will the 5SL3203-7MB fit a panel designed for the 5SL3116-6MB?","answer":"The 5SL3203-7MB is 36 mm wide (2 MW), while the 5SL3116-6MB is 18 mm wide (1 MW). Both share the same 76 mm depth and 90 mm height, so the panel depth and rail spacing are compatible, but the 5SL3203-7MB occupies one extra modular space. Rewiring is not required — same terminal layout and pitch."},{"question":"Where can I buy the 5SL3203-7MB 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 price and lead time."},{"question":"What compliance documentation is available for the 5SL3203-7MB?","answer":"The 5SL3203-7MB is a Siemens SENTRON series MCB. Standard documentation includes the manufacturer declaration of conformity (CE/UKCA), EN 60898 test certificate, and material compliance (RoHS, REACH). Specific document requests can be attached to an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3203-7MB","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/5SL3203-7MB 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}}