{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4403-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4403-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4403-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4403-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4403-8, miniature circuit breaker, 4-pole, 3 A, D characteristic, 10 kA breaking capacity, 400 V AC.","salesMarkdown":"## What this 4-pole D-curve MCB does on the panel The Siemens 5SL4403-8 is a 4-pole miniature circuit breaker from the SENTRON 5SL series, rated 3 A with a D tripping characteristic. It protects circuits against overload and short-circuit, with a breaking capacity of 10 kA per EN 60898 and IEC 60947-2. Rated for 400 V AC multi-phase operation, with a maximum of 440 V AC. It occupies 4 width units (72 mm) on a DIN rail, installs in any mounting position, and is rated IP20 with conductors connected — standard for enclosed distribution boards. The 5SL4403-8 is designed for residential buildings and infrastructure applications. It carries touch protection and is sealable, suitable for metering or tamper-proof installations. ## Terminal and environmental specs Screw terminals accept solid or stranded conductors from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m. The breaker is halogen-free and silicon-free, and operates in ambient temperatures from -25 to +55 °C with up to 95% humidity. Installation depth is 70 mm; overall dimensions are 72 mm wide, 90 mm high, and 76 mm deep.","metaTitle":"Siemens 5SL4403-8 SENTRON MCB, 4P, 3 A, D Curve, 10 kA","metaDescription":"Siemens 5SL4403-8 SENTRON miniature circuit breaker, 4-pole, 3 A rated current, D tripping characteristic, 10 kA breaking capacity per EN 60898. Active production, available to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 25 mm²","Width":"72 mm","title":"5SL4403-8","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"Miniature circuit breaker 400 V 10kA, 4-pole, D, 3A","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"5SL miniature circuit breakers","Energy limiting class":"3","Number of width units":"4","Number of poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL4","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"3 A","Tripping characteristic class":"D","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"10 kA","acc. to IEC 60947-2 / rated value":"10 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"+55 °C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"No","with multi-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/9100e56a614e6ff3a5b83a05355de6a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=149277&mlfb=5SL4403-8"},"ai":{"faq":[{"question":"Where can I buy the 5SL4403-8 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the 5SL4403-8's depth?","answer":"The depth is 76 mm."},{"question":"What conductor sizes does the 5SL4403-8 accept?","answer":"It accepts solid and stranded conductors from 0.75 to 25 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4403-8","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/5SL4403-8 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}}