{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7520-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7520-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7520-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7520-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7 series, miniature circuit breaker, order code 5SY7520-6, B characteristic, 20 A rated current, 2-pole (1P+N), 15 kA breaking capacity per EN 60898, 25 kA per IEC 60947-2.","salesMarkdown":"The 2-pole (1P+N) configuration switches the phase and provides overcurrent protection on the phase only, with the neutral switched but not protected; this is common in single-phase sub-distribution boards where a shared neutral bus is not desired. Breaking capacity is 15 kA at 230 V AC per EN 60898, and 25 kA per IEC 60947-2 — the higher figure applies when the breaker is used in industrial distribution where the prospective short-circuit current is higher. The 15 kA DC rating per IEC 60947-2 at 72 V covers DC auxiliary circuits. Rated for 50/60 Hz networks, with an ambient temperature range of -40 to +75 °C (operating) and -40 to +70 °C (storage). ## Terminal capacity and installation Installation depth is 70 mm, and the overall depth including the front toggle is 76 mm. Halogen-free and silicon-free construction matters in environments where outgassing from a fault could damage sensitive electronics or contaminate clean-room processes — common in semiconductor fabs, medical device assembly, and food processing lines. The energy limiting class 3 indicates the breaker limits let-through energy during a short circuit, reducing stress on downstream wiring and equipment.","metaTitle":"Siemens 5SY7520-6 SENTRON MCB, B-20A 2-Pole 15kA","metaDescription":"Siemens 5SY7520-6 SENTRON miniature circuit breaker, 20 A, B-curve, 2-pole (1P+N), 15 kA per EN 60898, 25 kA per IEC 60947-2. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-40 ... +70 °C","Mounting type":"Quick assembly system","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"230 V","Overvoltage category":"III","Combined Terminal Top":"Yes","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","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"20 A","Tripping characteristic class":"B","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"15 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"Yes","with single-phase operation / at AC / rated value":"250 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ff9d0031dcfbc52ee7ad77ff649bae5a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=242100&mlfb=5SY7520-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7520-6/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY7520-6's listed depth?","answer":"The overall depth is 76 mm; the installation depth behind the panel is 70 mm."},{"question":"What conductor sizes does 5SY7520-6 accept?","answer":"Solid and stranded conductors from 0.75 mm² up to 35 mm² fit the combined top and bottom terminals."},{"question":"Will 5SY7520-6 drop into a panel specified around 5SY6008-7 without rewiring?","answer":"Both are 2-pole (1P+N) SENTRON MCBs on the same DIN-rail footprint (2 width units, 36 mm), so the mechanical fit is identical. The 5SY7520-6 is a 20 A B-curve; the 5SY6008-7 is a different rating and characteristic — verify the circuit's load and short-circuit requirements before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7520-6","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/5SY7520-6 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}}