{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5120-6CC12","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5120-6CC12","canonicalUrl":"https://aoctrl.com/siemens/5SY5120-6CC12","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5120-6CC12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY5 series miniature circuit breaker, 5SY5120-6CC12, 1-pole B20 curve, 220V DC, 10kA interrupting capacity.","salesMarkdown":"The Siemens 5SY5120-6CC12 is a 1-pole miniature circuit breaker from the 5SY5 series, rated for 220V DC with a 10kA interrupting capacity and a B20 tripping curve. It's a DIN-rail mount component built for DC branch-circuit protection in control panels, switchgear, and distribution boards—typical for isolating and protecting DC loads like drives, power supplies, and fieldbus slices where a quick trip on overload is needed. The B20 curve means the breaker trips magnetically between 3x and 5x rated current (60 A to 100 A for a 20 A frame), which is standard for resistive and low-inductance DC loads—good for power supplies and control transformers, not for motor starting where inrush would nuisance-trip it. The 220V DC rating is specific: DC arcs are harder to extinguish than AC, so this breaker's internal arc chamber is designed for that voltage. The 1-pole width is one module (approx. 18 mm), so it fits tight gland-plate layouts. Terminal clamps accept up to 25 mm² conductor—enough for the 20 A rating with some headroom. No special derating for side-by-side mounting at 30 °C ambient, but above 40 °C consult the thermal derating curve in the full datasheet.","metaTitle":"Siemens 5SY5120-6CC12 MCB, 220V DC, 10kA, 1P B20","metaDescription":"Siemens 5SY5120-6CC12 MCB, 220V DC, 10kA interrupting capacity, 1-pole B20 curve. Current lifecycle stage. Available to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"title":"5SY5120-6CC12","description":"MCB 5SY5 CRH 220V DC 10KA 1P B20","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c9fd35cbdc1892de690172f84482604b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1265746&mlfb=5SY5120-6CC12"},"ai":{"faq":[{"question":"What is the interrupting rating of the 5SY5120-6CC12?","answer":"It has a 10kA interrupting capacity at 220V DC."},{"question":"Where can I buy the 5SY5120-6CC12?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What does the B20 curve mean on this breaker?","answer":"The B20 curve means the magnetic trip activates between 3x and 5x rated current (60-100 A for this 20 A unit), making it suitable for resistive and low-inductance DC loads like power supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5120-6CC12","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/5SY5120-6CC12 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}}