{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6420-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6420-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SJ6420-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6420-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SJ6420-7RC, MCB Retail line, 4-pole miniature circuit breaker, 6 kA breaking capacity, 20 A rated current, C characteristic.","salesMarkdown":"The Siemens 5SJ6420-7RC is a 4-pole miniature circuit breaker (MCB) from the Retail line, rated at 20 A with a C-trip characteristic and a 6 kA breaking capacity. The C-curve means it trips at 5 to 10 times rated current — standard for general-purpose distribution and moderate motor starting loads where short inrush won't nuisance-trip. ## Lifecycle & Sourcing For a BOM freeze or line-down spare, this part can be sourced to order. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm delivery commitment. ## Integration Notes Mounts on standard DIN rail in a distribution board or sub-panel. The 4-pole (4P) construction switches all three phases plus neutral, suitable for three-phase final subcircuits in commercial or light industrial installations. The 6 kA breaking capacity covers most building-service fault levels; verify the prospective short-circuit current at the point of installation.","metaTitle":"Siemens 5SJ6420-7RC MCB 4p 6kA 20A C Characteristic","metaDescription":"Siemens 5SJ6420-7RC MCB, 4-pole, 6kA breaking capacity, 20A, C-curve. Current lifecycle stage. Available to order — request quote for pricing and lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SJ6420-7RC","description":"MCB Retail line 4p 6kA 20A C Characteristic","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9ffe3910fb1a0ef12b0cd596ed5c90c6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1423795&mlfb=5SJ6420-7RC"},"ai":{"faq":[{"question":"What is the 5SJ6420-7RC used for?","answer":"It is a 4-pole miniature circuit breaker rated 20 A with a C characteristic and 6 kA breaking capacity, used for overcurrent and short-circuit protection in three-phase distribution circuits."},{"question":"Where can I buy the 5SJ6420-7RC?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6420-7RC","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/5SJ6420-7RC 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}}