{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY3250-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY3250-6","canonicalUrl":"https://aoctrl.com/siemens/5SY3250-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY3250-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY3 series, miniature circuit breaker, 2-pole, 50 A, B-curve, 4.5 kA (EN 60898) / 6 kA (IEC 60947-2), 400 V AC, 72 V DC max, 2 width units (36 mm), IP20.","salesMarkdown":"That B-curve means it trips at 3–5× rated current — standard for general-purpose lighting and distribution circuits where you don't want nuisance trips from motor inrush. The 4.5 kA breaking capacity per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC tell you it can safely interrupt a fault up to those levels without welding contacts or cascading upstream. For DC circuits it's rated 15 kA at 72 V max per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No.235 — useful if you're feeding a DC bus or control supply off the same panel. The 2-pole (2P) configuration with 36 mm width (2 width units) snaps onto standard DIN rail. Mounting position is any, so you can lay it sideways in a tight gland plate area if needed. Terminal capacity accepts 0.75 to 35 mm² solid or stranded — covers everything from a 1.5 mm² control circuit tail up to a 35 mm² main feeder. Combined terminals top and bottom mean you can feed from either end without reconfiguring. Height 90 mm, width 36 mm. The 2-pole body leaves room for a 4-pole isolator or a second MCB in the same 72 mm wide slot. Ambient temperature range -25 to +55 °C, storage -40 to +75 °C. Rated per EN 60898 (4.5 kA) and IEC 60947-2 (6 kA) for AC circuits, plus UL 1077 and CSA C22.2 No.235 (5 kA) for North American acceptance. Sealable with a lockable cover for isolation lockout/tagout procedures.","metaTitle":"Siemens 5SY3250-6 SENTRON MCB, 50A, 2-Pole, B-Curve, 6kA IEC","metaDescription":"Siemens 5SY3250-6 SENTRON miniature circuit breaker, 50 A, 2-pole, B-curve, 4.5 kA (EN 60898) / 6 kA (IEC 60947-2). Current lifecycle stage. Quoted to order against RFQ.","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":"50 A","Tripping characteristic class":"B","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=220111&mlfb=5SY3250-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY3250-6/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY3250-6 at 400 V AC?","answer":"4.5 kA per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC. For DC circuits it's rated 15 kA at 72 V max per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No.235."},{"question":"What conductor sizes does 5SY3250-6 accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm². The combined terminals top and bottom accept the same range, so you can feed from either end."},{"question":"Will 5SY3250-6 drop into a panel that was specified around 5SY3132-6 without rewiring?","answer":"Both are 2-pole SENTRON MCBs on the same 36 mm footprint, same DIN-rail mount, same terminal range. The 5SY3250-6 is a 50 A B-curve; the 5SY3132-6 is a 32 A C-curve. If the panel was wired for 32 A and the bus bar is sized for that, dropping in a 50 A breaker without upgrading the downstream conductor and bus rating would be a code violation. Mechanically it fits; electrically you need to verify the wire sizing and coordination study."},{"question":"Where can I buy 5SY3250-6 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 is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY3250-6","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/5SY3250-6 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}}