{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6520-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6520-6","canonicalUrl":"https://aoctrl.com/siemens/5SJ6520-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6520-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 miniature circuit breaker, 1P+N, B-curve, 20 A, 6 kA per EN 60898, 240 V AC, IP20, 70 mm depth.","salesMarkdown":"## What this 5SJ6520-6 does in the panel That's enough for a 20 A feed and downstream tails in the same clamp. The terminal is sealable — important if the panel gets locked and tagged by the utility or an inspector who wants to verify nobody's tampered with the circuit after commissioning. ## Mounting and integration — DIN-rail fit Mounting position is any — vertical, horizontal, upside-down — the arc chamber works the same. Ambient temperature range is -20 to +45 °C, with short-term excursions up to +55 °C and 95% humidity. That covers a ventilated enclosure in a boiler room or a shaded outdoor kiosk, but if it's living next to a hot transformer or direct sun, keep the ambient check in mind. ## What the approvals mean for your panel That dual rating means it meets the household standard (EN 60898) and the industrial standard (IEC 60947-2) — so it's accepted in residential DBs and in industrial control panels that spec the IEC 60947-2 mark. Insulation voltage is 440 V AC, overvoltage category III, which is the typical distribution-board category. Vibration resistance is tested per IEC 60068-2-6 at 50 m/s² over 25 to 150 Hz — it'll hold up on a machine skid or a genset-mounted panel. Mechanical service life is 20 000 switching cycles typical. That's the handle-and-mechanism endurance, not the electrical endurance under load — but it tells you the mechanism is built for years of occasional manual isolation, not daily load switching.","metaTitle":"Siemens 5SJ6520-6 SENTRON MCB, 1P+N, B-Curve, 20 A, 6 kA","metaDescription":"Siemens 5SJ6520-6 SENTRON miniature circuit breaker, 1P+N, B tripping characteristic, 20 A, 6 kA breaking capacity per EN 60898. 240 V AC, 25 mm² terminals. Active production, sour","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Solid":"0.75 ... 25 mm²","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-20 ... +45 °C","Product designation":"Miniature circuit breakers","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","circuit-breaker / Design":"5SJ6","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","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"240 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Insulation voltage / at AC / rated value":"440 V","Vibration resistance / acc. to IEC 60068-2-6":"50m/s² at 25 to 150Hz and 60m/s² at 10 to 150 Hz","with multi-phase operation / at AC / maximum":"440 V","Mechanical service life (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=250979&mlfb=5SJ6520-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6520-6/alternatives.json"},"ai":{"faq":[{"question":"What is the wire size range for the 5SJ6520-6 terminals?","answer":"Solid and stranded conductors from 0.75 mm² up to 25 mm². The terminal is sealable, which allows utility or inspector locking after commissioning."},{"question":"Where can I buy the 5SJ6520-6 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6520-6","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/5SJ6520-6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}