{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6520-6KS","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6520-6KS","canonicalUrl":"https://aoctrl.com/siemens/5SJ6520-6KS","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6520-6KS","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 miniature circuit breaker, 20 A, B characteristic, 1P+N, 6 kA breaking capacity, 230 V AC, screwless outgoing terminals.","salesMarkdown":"The Siemens 5SJ6520-6KS is a SENTRON 5SJ6 miniature circuit breaker rated 20 A at 230 V AC with a B tripping characteristic and 1P+N pole configuration. The 20 A B-curve is the go-to for lighting, socket outlets, and small appliance circuits in European-style distribution boards. The 1P+N design switches both line and neutral, which is common in single-phase final subcircuits where neutral isolation is required. Screwless outgoing terminals (push-in) speed up panel wiring and reduce torque-check time on the assembly line. Mechanical service life is 20 000 switching cycles, which is typical for a residential-grade MCB — not a high-cycle machine tool breaker. ## Panel integration Mounting position is any — no restriction on orientation. The IP20 rating holds only with connected conductors, so the busbar and wiring must be in place before the breaker is considered touch-safe.","metaTitle":"Siemens 5SJ6520-6KS SENTRON MCB, 20 A, B Curve, 1P+N, 6 kA","metaDescription":"Siemens 5SJ6520-6KS SENTRON miniature circuit breaker, 20 A rated current, B tripping characteristic, 1P+N, 6 kA breaking capacity per EN 60898. Active production, available to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SJ6520-6KS","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50 Hz","description":"Miniature circuit breaker 230 V 6kA, 1+N-pole, B, 20 A, D=70 mm with screwless outgoing terminals","Halogen-Free":"Yes","Silicon-Free":"Yes","Number of poles":"2","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"Miniature circuit breaker 5SJ6","Energy limiting class":"3","Number of width units":"2","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SJ6","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"20 A","Tripping characteristic class":"B","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"6 kA","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"230 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Insulation voltage / at AC / rated value":"250 V","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.43","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7087a1bbe2a15b5982dfad7c475b839d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=3077&mlfb=5SJ6520-6KS"},"ai":{"faq":[{"question":"Where can I buy 5SJ6520-6KS and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ to confirm current availability and pricing."},{"question":"What is the difference between 5SJ6520-6KS and 5SL6016-7KL?","answer":"5SL6016-7KL is a 16 A B-curve 1P+N MCB from the same SENTRON family, but it uses a different breaking capacity rating (typically 10 kA per EN 60898) and screw-type terminals. The 5SJ6520-6KS is 20 A with 6 kA breaking capacity and screwless push-in terminals. Panel footprint (2 width units, 36 mm) is the same, so it drops into the same DIN slot without rewiring."},{"question":"What is the depth of 5SJ6520-6KS?","answer":"Depth is 76 mm; installation depth is 70 mm."},{"question":"What is the width of 5SJ6520-6KS?","answer":"Width is 36 mm, which corresponds to 2 width units on a standard DIN-rail mounting."},{"question":"Will 5SJ6520-6KS drop into a panel specified for 5SL6016-7KL without rewiring?","answer":"Yes — both are 1P+N, 2-width-unit (36 mm) SENTRON MCBs on the same DIN-rail footprint. The 5SJ6520-6KS uses screwless push-in terminals, so if the panel was wired for screw terminals the conductors will still fit, but the termination method differs. No busbar or DIN-rail rework is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6520-6KS","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/5SJ6520-6KS 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}}