{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4120-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4120-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4120-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4120-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4120-7RC, miniature circuit breaker, 1-pole, C-curve, 20 A, 10 kA per EN 60898, 415 V AC, 1 MW unit width.","salesMarkdown":"The Siemens SENTRON 5SL4120-7RC is a 1-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 20 A at 30 °C and 415 V AC. The 10 kA breaking capacity per EN 60898 tells you it can safely interrupt a fault current up to 10,000 A at 415 V AC without welding its contacts or venting plasma into the panel. That's the standard residential and light-commercial fault level across most of Europe and Asia. Rated 20 A continuous at 30 °C ambient, it carries a 1-module (18 mm) footprint, so it snaps onto DIN rail at one slot per pole. Depth 76 mm (70 mm installation depth), width 18 mm per pole. Mounting position any.","metaTitle":"Siemens 5SL4120-7RC SENTRON MCB, 1P C-curve 20 A, 10 kA","metaDescription":"Siemens SENTRON 5SL4120-7RC miniature circuit breaker, 1-pole, C-curve, 20 A rated, 10 kA breaking capacity per EN 60898, 415 V AC. Active production, sourced to order. Request quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","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":"20 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","according to EN 61346-2":"F","at 30 °C / rated value":"20 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","according to EN 60898 / rated value":"10 kA","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","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/969d2a03ff948cc8b48940093bb94601.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=240937&mlfb=5SL4120-7RC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4120-7RC/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 5SL4120-7RC?","answer":"The 5SL6120-7 is the closest sibling — same 1-pole, C-curve, 20 A rating, same dimensions and mounting. The difference is breaking capacity: 10 kA on the 5SL4120-7RC versus 6 kA on the 5SL6120-7. If your panel's fault level is below 6 kA, the 5SL6120-7 drops in without any rewiring."},{"question":"Will 5SL4120-7RC drop into a panel specified around 5SL6120-7?","answer":"Yes, both share the same 18 mm width, 76 mm depth, 90 mm height, and DIN-rail mounting. No rewiring or rail repositioning is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4120-7RC","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/5SL4120-7RC 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}}