{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4550-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4550-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4550-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4550-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4 series, miniature circuit breaker, order code 5SY4550-5, 50 A, 2-pole 1P+N, tripping characteristic A, 10 kA breaking capacity per EN 60898, 15 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SY4550-5 is a SENTRON 5SY4 miniature circuit breaker rated 50 A at 230 V AC, 2-pole (1P+N) with tripping characteristic A. The 50 A rating means it protects a circuit drawing up to that continuous current — sized for a feeder or submain, not a final subcircuit. Mounts on a standard 36 mm DIN rail (2 width units) with a 90 mm height and 76 mm depth behind the panel — the 70 mm installation depth means it clears most gland plates and backplane wiring without extra standoffs. Approvals include compliance with EN 60898 (domestic/light commercial) and IEC 60947-2 (industrial), plus UL 1077 and CSA C22.2 No. 235 with a 5 kA interrupting rating at AC. Ambient temperature range -40 to +70 °C covers most indoor and outdoor enclosures; derate humidity per the curve: 95% RH up to 55 °C, then 55% up to 70 °C. The sealable feature (padlockable toggle) lets you lock the breaker in OFF position for lockout/tagout without an external hasp. Touch protection is built in (IP20 with conductors connected), meaning the busbar and terminal screws are shielded from accidental contact when the panel door is open.","metaTitle":"Siemens 5SY4550-5 SENTRON MCB, 50 A, 2-Pole, Type A, 10 kA","metaDescription":"Siemens 5SY4550-5 SENTRON miniature circuit breaker, 50 A rated, 2-pole 1P+N, tripping characteristic A, 10 kA (EN 60898) / 15 kA (IEC 60947-2). Active production. Sourced 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","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":"-40 ... +70 °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","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":"5SY4","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"50 A","Tripping characteristic class":"A","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"15 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/c30cc3a0fb0536d8cb0126d725950e06.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=23415&mlfb=5SY4550-5","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4550-5/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4550-5","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/5SY4550-5 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}}