{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4303-7CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4303-7CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4303-7CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4303-7CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY4303-7CC11, 3-pole, C-curve, 3 A rated current, 10 kA breaking capacity per EN 60898, 400 V AC, 72 V DC.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SY4303-7CC11 is a 3-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated for 3 A at 400 V AC. It's built for branch-circuit protection in industrial control panels, distribution boards, and railway applications. The C-curve means it trips between 5 and 10 times the rated current — standard for moderate inrush loads like small motors, transformers, and lighting banks where you need to ride through the startup surge without nuisance trips. Its 10 kA breaking capacity per EN 60898 at 400 V AC means it can safely interrupt a fault current up to that level — enough for most downstream sub-distribution in an industrial panel, provided the upstream device coordinates properly. ## Key ratings and what they mean for fit Rated 3 A continuous at 400 V AC, with multi-phase and single-phase operation up to 440 V AC. That's a 3-pole device for a 3-phase load or three independent single-phase circuits sharing a common trip. It also carries a DC rating of 72 V maximum — useful for DC control circuits in the same panel, but note the voltage limit is lower than the AC rating. Pollution degree 3 and overvoltage category III mean it's rated for the harsh electrical environment inside an industrial enclosure — not just clean office distribution. The IP20 rating (with connected conductors) is standard for panel-mount gear; it's not meant for wet or dusty locations without an enclosure. ## Mounting and panel integration Mounts on a DIN rail via the quick assembly system — snap it on, no tools needed. Occupies 3 width units (54 mm wide). Installation depth is 70 mm, overall depth 76 mm. Height is 90 mm. Works in any mounting position. Combined terminals at top and bottom accept conductors; the device is sealable and touch-protected. Halogen-free and silicon-free construction matters if the panel is in a clean room or near sensitive electronics.","metaTitle":"Siemens SENTRON 5SY4303-7CC11 MCB, 3-Pole C-Curve 3A 10kA","metaDescription":"Siemens SENTRON 5SY4303-7CC11 miniature circuit breaker, 3-pole, C-curve, 3 A, 10 kA breaking capacity per EN 60898. Rated 400/440 V AC, 72 V DC. For panel integration. Available t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4303-7CC11","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 3-pole, C, 3 A for railway applications","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"3","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Degree of pollution":"3","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","Design of the product":"For railway applications","Energy limiting class":"3","Number of width units":"3","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Tripping characteristic class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Operating current / at AC / rated value":"3 A","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/94df11ed7d6c423932d1889f603fd1d6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=310062&mlfb=5SY4303-7CC11"},"ai":{"faq":[{"question":"What is 5SY4303-7CC11's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm; installation depth (behind the panel face) is 70 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4303-7CC11","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/5SY4303-7CC11 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}}