{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL5204-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL5204-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL5204-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL5204-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL5204-7RC, 2-pole miniature circuit breaker, C-curve 4 A, 440 V DC, 10 kA breaking capacity, IP20.","salesMarkdown":"## DC-rated MCB for solar, UPS, and battery-bank circuits The Siemens 5SL5204-7RC is a 2-pole miniature circuit breaker from the SENTRON 5SL series, purpose-rated for DC circuits at 440 V with a 10 kA breaking capacity and C-curve tripping characteristic at 4 A. That 440 V DC rating is the headline here — most 2-module MCBs in this footprint top out at 72 V DC, so this one handles ungrounded DC bus voltages common in photovoltaic combiners, UPS battery strings, and DC distribution in telecom shelters. ## What the DC rating means in practice DC arcs don't self-extinguish at current zero like AC does, so a breaker's DC voltage rating is the real constraint. At 440 V DC, this 2-pole unit uses both poles in series to stretch and cool the arc — that's why it's a 2-pole design even though it's switching a single ungrounded DC circuit. The 10 kA interrupting capacity at that voltage is verified for fault currents from battery banks or large capacitor banks. If you're used to seeing 6 kA on typical residential AC MCBs, the 10 kA here gives more headroom for high-fault installations. Same 76 mm depth, 36 mm width, 90 mm height as the 5SL6220-7 (which is an AC-rated 2-pole C-curve). If a panel was laid out for the 5SL6220-7 but the circuit needs DC protection, the 5SL5204-7RC swaps in without moving the DIN rail or changing the enclosure depth. Same sealable design, same IP20 with conductors, same mounting position any orientation. The difference is purely electrical: 440 V DC vs 400 V AC, and 10 kA vs 6 kA breaking capacity.","metaTitle":"Siemens 5SL5204-7RC SENTRON MCB, 2P C4, 440 VDC, 10 kA","metaDescription":"Siemens 5SL5204-7RC SENTRON 2-pole miniature circuit breaker, C-curve 4 A, rated 440 V DC with 10 kA breaking capacity. Current production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SL5204-7RC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 440 V DC DC 10 kA 2-pole C 4","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","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"440 V","Type Of Voltage / Of The Operating Voltage":"DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b7473631c57d11b87179dec73fecd6ea.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=654120&mlfb=5SL5204-7RC"},"ai":{"faq":[{"question":"Where can I buy the 5SL5204-7RC and get a price?","answer":"Sourced and quoted to order through independent distribution against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of the 5SL5204-7RC?","answer":"76 mm depth, 36 mm width (2 modular units), 90 mm height. Installation depth behind the panel surface is 70 mm."},{"question":"Will the 5SL5204-7RC fit a panel designed for the 5SL6220-7?","answer":"Yes — same 76 mm depth, 36 mm width, 90 mm height, same DIN-rail mounting, same IP20 with conductors. The swap is purely electrical: 440 V DC / 10 kA vs 400 V AC / 6 kA. No rewiring or enclosure modification needed."},{"question":"What compliance documentation does Siemens provide for the 5SL5204-7RC?","answer":"The SENTRON 5SL series carries IEC/EN 60898 and IEC 60947-2 certifications. Halogen-free and silicon-free construction is documented. Specific documentation (RoHS, REACH, UL) is available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL5204-7RC","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/5SL5204-7RC 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}}