{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5450-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5450-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5450-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5450-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5450-7CC, miniature circuit breaker, 880 V DC, 10 kA, 4-pole, C-curve, 50 A.","salesMarkdown":"The Siemens SENTRON 5SY5450-7CC is a 4-pole miniature circuit breaker rated for 880 V DC with a 10 kA breaking capacity per IEC 60947-2. The C-curve tripping characteristic (5–10× In) makes it suitable for moderate inrush loads like motor control circuits and industrial DC supplies where you need selectivity against downstream faults. The 50 A rating covers the common DC bus size for a mid-range drive or a distribution subfeed in a 24–48 V control cabinet converted to 880 V PV string combiner boxes. ## DC ratings and breaking capacity Rated 880 V DC with a maximum of 1 000 V DC — this covers the nominal voltage of most utility-scale solar arrays (typically 600–1000 Vdc) and industrial DC link circuits. The 10 kA breaking capacity at 880 V DC (IEC 60947-2) is the figure that governs fault clearing in a DC bus; at 400 V AC per UL 1077/CSA C22.2 No.235 it carries 5 kA. For a DC circuit, polarity must be observed on the supply cord — the breaker is not polarity-agnostic, so pre-wire with the marked line and load orientation. IP20 with connected conductors — finger-safe front, but the terminals require the panel to be closed during normal operation. Rated for ambient temperatures from -40 °C to +75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C). Pollution degree 2 (non-conductive dust, occasional condensation). Overvoltage category II — suitable for downstream distribution, not the main service entrance.","metaTitle":"Siemens 5SY5450-7CC SENTRON MCB, 880V DC, 10kA, 4P, C, 50A","metaDescription":"Siemens SENTRON 5SY5450-7CC miniature circuit breaker, 880V DC, 10kA breaking capacity, 4-pole, C-curve, 50A. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY5450-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 880 V DC 10kA, 4-pole, C, 50 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"4","Type of voltage":"DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Degree of pollution":"2","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at DC / rated value":"880 V","Overvoltage category":"II","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":"5SY5CC","Suitability for operation":"Mechanical engineering / industry","Tripping characteristic class":"C","at DC / rated value / maximum":"1 000 V","Position / of power supply cord":"Consider polarity","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":"10 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Product function / neutral conductor switching":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4024c1f77e7c8062df47d1ebb6d88bb0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=461207&mlfb=5SY5450-7CC"},"ai":{"faq":[{"question":"Where can I buy 5SY5450-7CC?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What compliance documentation does Siemens provide for 5SY5450-7CC?","answer":"The breaker carries IEC 60947-2 (DC breaking capacity 10 kA) and UL 1077 / CSA C22.2 No.235 (AC 5 kA) ratings. It is halogen-free and silicon-free per the spec. Standard Siemens documentation includes RoHS and REACH declarations; the product designation and EN 61346-2 / EN 81346-2 function codes (F) are on the device label."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5450-7CC","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/5SY5450-7CC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}