{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7550-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7550-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7550-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7550-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7550-6 miniature circuit breaker, 2-pole (1P+N), 50 A rated current, B tripping characteristic, 15 kA (EN 60898) / 20 kA (IEC 60947-2) breaking capacity, 36 mm wide, IP20.","salesMarkdown":"The Siemens 5SY7550-6 is a SENTRON miniature circuit breaker (MCB) with a B tripping curve, rated 50 A at 230 V AC, in a 2-pole (1P+N) form factor. It provides overcurrent and short-circuit protection for branch circuits in industrial control panels and building distribution boards, with a breaking capacity of 15 kA per EN 60898 and 20 kA per IEC 60947-2. Rated 50 A with a B characteristic means it trips magnetically at 3 to 5 times rated current — suited for resistive and general-purpose loads where inrush is moderate, like lighting circuits or small motor feeders with separate overload protection. Breaking capacity of 15 kA at 230 V AC per EN 60898 covers most commercial and light-industrial fault levels; the higher 20 kA rating per IEC 60947-2 applies when the MCB is used in an industrial context where the prospective short-circuit current may be higher. Mounting position is any orientation, simplifying layout. Terminals accept solid or stranded conductors from 0.75 to 35 mm² — enough for the full 50 A circuit without pigtails. Combined terminal design (top and bottom) supports both busbar and cable entry. ## Where it goes and environmental limits Rated for ambient temperatures from -40 °C to +75 °C, with humidity limits up to 95 % at 55 °C — suitable for unheated enclosures in temperate or cold climates, and for warm cabinet interiors near other heat sources.","metaTitle":"Siemens 5SY7550-6 SENTRON MCB, 50 A, B Curve, 2-Pole","metaDescription":"Siemens 5SY7550-6 SENTRON miniature circuit breaker, 50 A, B characteristic, 2-pole (1P+N), 15 kA per EN 60898, 20 kA per IEC 60947-2. Active production. Quoted to order against RF","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":"50 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":"20 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/b447f776338382c01c2e8c5b031a33c3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=371152&mlfb=5SY7550-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7550-6/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7550-6?","answer":"15 kA per EN 60898 at 230 V AC, and 20 kA per IEC 60947-2 at 230 V AC. For DC circuits the breaking capacity is 15 kA at up to 72 V DC per IEC 60947-2."},{"question":"Will 5SY7550-6 drop into a panel that was specified around 5SY3132-6 without rewiring?","answer":"Both are SENTRON 2-pole MCBs on the same DIN-rail footprint and terminal range, so the mechanical fit is identical. The main difference is the current rating — 5SY7550-6 is 50 A, while 5SY3132-6 is a lower-rated variant. Verify the circuit's load requirement before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY7550-6?","answer":"Siemens provides a Declaration of Conformity for the SENTRON 5SY7 series covering the Low Voltage Directive, plus RoHS and REACH compliance declarations. The MCB carries CE marking and is designed to EN 60898 and IEC 60947-2. For specific documentation requests, include the order code on the RFQ."},{"question":"Where can I buy 5SY7550-6?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ with your quantity and target delivery window; we confirm availability and current pricing at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7550-6","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/5SY7550-6 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}}