{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL7120-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL7120-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL7120-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL7120-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Betagard 5SL7120-7RC, miniature circuit breaker, 1-pole, C-curve, 20 A, 15 kA (EN 60898) / 20 kA (IEC 60947-2), 240/415 V AC, 1 MW.","salesMarkdown":"The Siemens Betagard 5SL7120-7RC is a 1-pole miniature circuit breaker with a C-curve trip characteristic rated 20 A at 30 °C. It occupies a single modular width (18 mm) on the DIN rail, with a depth of 76 mm and an installation depth of 70 mm behind the panel surface. The 15 kA breaking capacity per EN 60898 and 20 kA per IEC 60947-2 cover most industrial panel secondary circuits — think control transformers, lighting, or small motor branch protection where the prospective fault current stays under those limits. ## Temperature derating and ambient limits At 40 °C it derates to 19 A, at 50 °C to 18 A, and at 60 °C to 17.2 A. Snap-on DIN rail mount, any position. The 18 mm width (1 MW) and 70 mm installation depth fit standard distribution boards. Touch protection is integral. The breaker is sealable — useful for utility-metered or tenant-submetered installations where tamper evidence matters. IP20 with connected conductors; keep it inside a closed enclosure.","metaTitle":"Siemens Betagard 5SL7120-7RC MCB, 1P C20, 15 kA","metaDescription":"Siemens Betagard 5SL7120-7RC miniature circuit breaker, 1-pole, C-curve, 20 A, 15 kA per EN 60898, 20 kA per IEC 60947-2. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL7120-7RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240/415 V 1-pole 15 kA C 20","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":"Betagard","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","at 30 °C / rated value":"20 A","at 40 °C / rated value":"19 A","at 45 °C / rated value":"18.6 A","at 50 °C / rated value":"18 A","at 55 °C / rated value":"17.6 A","at 60 °C / rated value":"17.2 A","Suitability For Operation":"Industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"15 kA","acc. to IEC 60947-2 / rated value":"20 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"240 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":"440 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/f0a7b872ad3fc6767733e6f26debd2bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646570&mlfb=5SL7120-7RC"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL7120-7RC?","answer":"15 kA per EN 60898 and 20 kA per IEC 60947-2. The higher figure applies when the breaker is used under the industrial standard."},{"question":"Where can I buy 5SL7120-7RC?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 5SL7120-7RC drop into a panel specified for 5SL3116-6MB?","answer":"Both are 1-pole, 1-MW DIN-rail MCBs with the same 18 mm width and 70 mm installation depth. The 5SL7120-7RC carries a C-curve at 20 A with a 15 kA breaking capacity; the 5SL3116-6MB is a B-curve at 16 A with a 6 kA breaking capacity. Mechanical fit is identical, but the trip curve and rating differ — check the branch circuit requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL7120-7RC","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/5SL7120-7RC 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}}