{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7450-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7450-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7450-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7450-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7CC series, 4-pole miniature circuit breaker (MCB), D tripping characteristic, 50 A rated current, 400 V AC, 15 kA IEC 60947-2, 5 kA UL 1077.","salesMarkdown":"## 50 A D-curve MCB for motor and transformer branch circuits The Siemens 5SY7450-8CC is a 4-pole SENTRON miniature circuit breaker with a D tripping characteristic rated at 50 A at 400 V AC. The 15 kA breaking capacity per IEC 60947-2 means it safely clears a fault up to that level without upstream fuses needing to open first; the 5 kA rating per UL 1077 covers North American panelboard applications. Mounting position is any orientation. Combined terminals top and bottom accept solid or stranded conductors from 0.75 to 35 mm². Tightening torque for the screw terminals is 2.5 to 3.5 N·m. Ambient temperature range is -25 to +55 °C operating, with storage from -40 to +75 °C. The 15 kA rated short-circuit capacity at 400 V AC (IEC 60947-2) allows this MCB to be used as the main branch protector in sub-distribution boards where fault levels are moderate. For higher fault currents, upstream backup fusing or a higher-rated MCCB is required. The D-curve ensures selectivity with downstream C-curve MCBs on most motor-start profiles, but coordination should be verified against the specific load's inrush duration.","metaTitle":"Siemens 5SY7450-8CC SENTRON MCB, 4P D 50 A, 15 kA IEC","metaDescription":"Siemens 5SY7450-8CC SENTRON 4-pole miniature circuit breaker, D-curve, 50 A, 400 V AC, 15 kA IEC breaking capacity, 5 kA UL 1077. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-25 ... +55 °C","Mounting type":"Quick assembly system","Number of poles":"4","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":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"4","Number of poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"50 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","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 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","with single-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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4715c5c9014247db77a1673bbe363392.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=12432&mlfb=5SY7450-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7450-8CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SY7450-8CC and get a price?","answer":"The 5SY7450-8CC is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the 5SY7450-8CC rated breaking capacity?","answer":"15 kA at 400 V AC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"What conductor sizes does the 5SY7450-8CC accept?","answer":"Solid and stranded conductors from 0.75 to 35 mm² at the screw terminals."},{"question":"What compliance documentation is available for the 5SY7450-8CC?","answer":"The MCB carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 approvals. It is halogen-free and silicon-free. RoHS and REACH compliance documentation is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7450-8CC","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/5SY7450-8CC 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}}