{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY3205-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY3205-7","canonicalUrl":"https://aoctrl.com/siemens/5SY3205-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY3205-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY3 series, 5SY3205-7, 2-pole miniature circuit breaker, C-curve, 0.5 A rated current, 4.5 kA (EN 60898) / 6 kA (IEC 60947-2) breaking capacity, 400 V AC, 72 V DC max, IP20, quick-assembly mounting.","salesMarkdown":"The Siemens 5SY3205-7 is a 2-pole miniature circuit breaker from the SENTRON 5SY3 series, rated at 0.5 A with a C tripping characteristic. The 4.5 kA breaking capacity per EN 60898 covers most residential and light commercial fault levels, while the 6 kA rating per IEC 60947-2 gives you a bit more headroom for industrial panel designs. At 36 mm wide (2 width units), it fits standard 18 mm-per-pole spacing. The 0.5 A C-curve means this breaker holds through short-duration inrush up to 5-10x rated current before tripping magnetically — sized for protecting a control transformer primary, a small contactor coil circuit, or a signal-conditioning power supply where you don't want nuisance trips from the startup surge. The C-curve is the middle ground between B (more sensitive) and D (motor-start tolerant). At 400 V AC, the 4.5 kA SCCR per EN 60898 certifies it for use in standard household/commercial final circuits; the 6 kA per IEC 60947-2 applies when you're specifying it into an industrial switchboard. The DC rating of 72 V max with 15 kA breaking capacity per IEC 60947-2 means it can also protect a 48 V or 60 V DC bus in a telecom or control cabinet — but watch the polarity marking if your DC supply is grounded. The 36 mm width (2 width units) and 76 mm depth leave room for adjacent breakers and wire bending space. Terminals accept 0.75 to 35 mm² solid or stranded copper — the range covers both small control wiring (1.5 mm²) and heavier feeder tails (up to 35 mm²).","metaTitle":"Siemens 5SY3205-7 SENTRON MCB, 2P C 0.5 A, 4.5 kA","metaDescription":"Siemens 5SY3205-7 SENTRON miniature circuit breaker, 2-pole C-curve 0.5 A, 4.5 kA per EN 60898, 6 kA per IEC 60947-2. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-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","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Energy limiting class":"3","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY3","Current / at AC / rated value":"0.5 A","Tripping characteristic class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"4.5 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"6 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":"No","with multi-phase operation / at AC / rated value":"440 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=454672&mlfb=5SY3205-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY3205-7/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY3205-7's depth and width for panel layout?","answer":"The depth is 76 mm and the width is 36 mm (2 width units at 18 mm per pole). This fits standard DIN-rail spacing with room for adjacent breakers."},{"question":"What wire sizes does the 5SY3205-7 accept?","answer":"The terminals accept solid or stranded copper from 0.75 mm² up to 35 mm² — that covers everything from small control wires to heavy feeder tails."},{"question":"What compliance documentation does Siemens provide for 5SY3205-7?","answer":"The breaker is designed to EN 60898 (4.5 kA breaking capacity) and IEC 60947-2 (6 kA AC, 15 kA DC). It also carries UL 1077 and CSA C22.2 No. 235 recognition at 5 kA AC. Compliance with RoHS and REACH is standard for Siemens SENTRON products, though the specific declarations are provided with the shipment or on request."},{"question":"How do I get current pricing and availability for 5SY3205-7?","answer":"Submit an RFQ through this listing. We source the part against your order and confirm current pricing and availability at quote time — no stock count or price is listed here because it varies with quantity and market conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY3205-7","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/5SY3205-7 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}}