{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7550-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7550-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7550-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7550-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7 series, miniature circuit breaker, 50 A, C-curve, 1P+N, 15 kA (EN 60898) / 20 kA (IEC 60947-2), 230 V AC, 72 V DC max, IP20.","salesMarkdown":"## 50 A C-Curve MCB for Panel Protection Rated 230 V AC with a breaking capacity of 15 kA per EN 60898 and 20 kA per IEC 60947-2, this MCB is sized for sub-distribution boards where the prospective fault current stays under those thresholds. The 72 V DC maximum rating (per IEC 60947-2, 15 kA) covers control-circuit DC supplies, though the primary application is AC branch protection. Mounts via the quick-assembly system onto standard DIN rail — 36 mm width (2 width units), 90 mm height, 76 mm depth. Installation depth is 70 mm. Sealable design allows panel-lockout procedures. Halogen-free and silicon-free construction, suited for sensitive environments like semiconductor fabs or clean rooms where outgassing must be minimized. The MCB is rated for mechanical engineering and industry applications per its suitability designation. Humidity derating applies: max 95% RH up to 55 °C, derating to 55% at 70 °C and 35% at 75 °C — relevant for panels in hot, humid locations.","metaTitle":"Siemens 5SY7550-7 SENTRON MCB, 50 A, C-Curve, 1P+N, 15 kA","metaDescription":"Siemens 5SY7550-7 SENTRON miniature circuit breaker, 50 A rated, C tripping characteristic, 1P+N, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Current lifecycle stage. 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","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":"C","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/527e86133675d9fe93c45b0c19d946ed.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=346014&mlfb=5SY7550-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7550-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7550-7?","answer":"15 kA per EN 60898 and 20 kA per IEC 60947-2 at 230 V AC. For DC applications, it is rated 15 kA per IEC 60947-2 at 72 V DC max."},{"question":"What wire sizes does 5SY7550-7 accept?","answer":"Solid or stranded conductors from 0.75 to 35 mm². Combined top and bottom terminals allow through-wiring."},{"question":"Where can I buy 5SY7550-7?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"What is the difference between 5SY7550-7 and 5SY6008-7?","answer":"The 5SY6008-7 is a lower-current variant (6 A, B-curve, 1P+N) from the same SENTRON family. The 5SY7550-7 at 50 A C-curve is for higher-load branch circuits; panel footprint and terminal range are similar, but the trip curve and amp rating differ, so a direct swap without recalculating the circuit protection is not advised."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7550-7","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/5SY7550-7 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}}