{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL5120-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL5120-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL5120-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL5120-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 1-pole, C-curve, 20 A, 220 VDC, 10 kA breaking capacity, 18 mm wide.","salesMarkdown":"The Siemens SENTRON 5SL5120-7RC is a 1-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 20 A at 220 VDC and a breaking capacity of 10 kA. This is a DC-rated MCB, not the more common AC version — the 220 VDC rating makes it suitable for DC distribution in telecom, solar combiner boxes, or industrial DC bus protection where you need a compact single-pole device. The 220 VDC maximum operating voltage is the key spec that differentiates this part. Standard AC-rated MCBs typically top out around 60–72 VDC for a single pole. The 5SL5120-7RC handles 220 VDC across one pole, which means it can directly protect a 220 VDC bus without needing series-connected poles. The C-curve (10–15× In magnetic trip) handles moderate inrush from DC loads like power supplies or contactor coils without nuisance tripping. At 18 mm width (1 modular unit), it occupies a single slot on a standard DIN rail.","metaTitle":"Siemens 5SL5120-7RC SENTRON MCB, 1P C20, 220 VDC, 10 kA","metaDescription":"Siemens SENTRON 5SL5120-7RC miniature circuit breaker, 1-pole, C-curve, 20 A, 220 VDC, 10 kA breaking capacity. Active production. Sourced 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":"5SL5120-7RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 220 V DC DC 10 kA 1-pole 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":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","at DC / rated value / maximum":"220 V","Product Feature / Touch Protection":"Yes","Type Of Voltage / Of The Operating Voltage":"DC","Product Component / Neutral Conductor Switching":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ad8121e47483cf66ce7f56cd8f62e7af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=654112&mlfb=5SL5120-7RC"},"ai":{"faq":[{"question":"What is the difference between 5SL5120-7RC and the AC-rated 5SL4120-7CC?","answer":"The key difference is the DC voltage rating. 5SL5120-7RC is rated for 220 VDC, while 5SL4120-7CC is an AC-only device rated 400 VAC but only 72 VDC. If your application is a DC bus at 220 V, the 5SL5120-7RC is the correct choice — the AC-rated sibling cannot handle that DC voltage on a single pole."},{"question":"Where can I buy 5SL5120-7RC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL5120-7RC","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/5SL5120-7RC 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}}