{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3403-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3403-7","canonicalUrl":"https://aoctrl.com/siemens/5SL3403-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3403-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL miniature circuit breaker, 4-pole, C-curve 3 A, 4.5 kA breaking capacity per EN 60898, 400 V AC, 4 MW units.","salesMarkdown":"## What it is and what it does The Siemens 5SL3403-7 is a SENTRON 5SL miniature circuit breaker (MCB) with four poles, a C tripping characteristic, and a 3 A rated current at 400 V AC. The C-curve means it trips between 5 and 10 times rated current — standard for protecting inductive loads like small motors, lighting ballasts, and distribution sub-circuits where inrush isn't extreme. Breaking capacity sits at 4.5 kA per EN 60898 and IEC 60947-2, which covers most residential and light commercial panel fault levels in 400 V three-phase networks. ## Fit and panel integration Four width units (72 mm wide) on a standard DIN rail. Installation depth is 70 mm; overall depth with terminals is 76 mm. Terminal blocks accept solid or stranded copper from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m. Mounting position is unrestricted, and the housing is IP20 with conductors connected — standard for enclosed distribution boards. The breaker is sealable, halogen-free, and silicon-free, which matters for panels in clean-room or food-processing environments where outgassing is a concern.","metaTitle":"Siemens 5SL3403-7 SENTRON MCB, 4P C 3A 4.5kA, 400V","metaDescription":"Siemens 5SL3403-7 SENTRON 4-pole MCB, C-curve 3A, 4.5kA per EN 60898, 400V AC. Current lifecycle. 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","Solid":"0.75 ... 25 mm²","Width":"72 mm","title":"5SL3403-7","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"Miniature circuit breaker 400 V 4.5 kA, 4-pole, C, 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 ... +45 °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":"5SL3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"3 A","Tripping characteristic class":"C","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"4.5 kA","acc. to IEC 60947-2 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"Periodically +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/cae92bdc47382dc8a8b4ca82943ba73a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=349334&mlfb=5SL3403-7"},"ai":{"faq":[{"question":"What are the key ratings of 5SL3403-7?","answer":"4-pole MCB, C-curve, 3 A rated current at 400 V AC, breaking capacity 4.5 kA per EN 60898 and IEC 60947-2, 4 MW units wide."},{"question":"Where can I buy 5SL3403-7?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for 5SL3403-7?","answer":"The breaker is halogen-free and silicon-free. It carries EN 60898 and IEC 60947-2 ratings. Standard SENTRON documentation includes CE declaration and manufacturer test certificates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3403-7","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/5SL3403-7 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}}