{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4406-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4406-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4406-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4406-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4406-5 miniature circuit breaker, 4-pole, 6 A, 400 V AC, tripping characteristic A, 10 kA breaking capacity per EN 60898, 4 width units, DIN rail.","salesMarkdown":"## 6 A, 4-pole, Char. A — what the ratings mean for fit The 5SY4406-5 is a 4-pole miniature circuit breaker from the Siemens SENTRON 5SY4 series, rated 6 A at 400 V AC with tripping characteristic A. The 6 A rating sets the continuous current ceiling for the protected circuit; the characteristic A curve trips between 2 and 3 times rated current (12–18 A), making it the fastest standard trip curve — suited for protecting semiconductor circuits, control transformers, or sensitive electronic loads where even a brief overcurrent could damage downstream components. Breaking capacity is rated 10 kA per EN 60898, 35 kA per IEC 60947-2, and 15 kA at DC per IEC 60947-2. The 35 kA IEC figure gives selectivity headroom in industrial panels where the upstream device may have a higher prospective fault current; the 10 kA EN rating is the standard domestic/commercial coordination value. For UL 1077 applications the interrupting rating is 5 kA at AC. ## DIN-rail footprint and wiring constraints Occupies 4 width units (72 mm) on a DIN rail, with a depth of 76 mm and height of 90 mm. The mounting position is unrestricted — the breaker can be installed horizontally or vertically without derating. Installation depth is 70 mm, so the breaker projects 6 mm beyond the rail for wiring access. Accepts solid or stranded conductors from 0.75 mm² up to 35 mm² at both top and bottom combined terminals. The wide cross-section range covers everything from control-circuit signal wiring (0.75 mm²) to main feeder tails (35 mm²) without needing adapters. Terminal sealable and touch-protected per the product features. ## Ambient range and environmental ratings Rated for ambient temperatures from -40 °C to +70 °C, with storage range matching the same -40 to +75 °C. The wide thermal envelope suits unheated enclosures, outdoor cabinets, or process areas near ovens. Humidity tolerance is specified as 95% at 55 °C, derating to 35% at 75 °C — relevant for tropical or washdown environments where condensation may occur. IP20 protection with connected conductors — the breaker itself is finger-safe, but the enclosure must provide additional ingress protection if the panel is in a wet or dusty location. Halogen-free and silicon-free construction, which matters for clean-room, semiconductor fab, or aerospace applications where outgassing or corrosive byproducts are a concern.","metaTitle":"Siemens 5SY4406-5 4-Pole MCB, 6 A, 400 V, Char. A, 10 kA","metaDescription":"Siemens 5SY4406-5 SENTRON 4-pole MCB, 6 A rated, 400 V AC, tripping characteristic A, 10 kA per EN 60898. Active production, sourced to order.","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 ... 35 mm²","Width":"72 mm","title":"5SY4406-5","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 4-pole, A, 6A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","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":"-40 ... +70 °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":"5SY4","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"6 A","Tripping characteristic class":"A","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"35 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 DC / acc. to IEC 60947-2 / rated value":"15 kA","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","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$340.44","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/44e0e309c45b4cc23e8d6045cb71db02.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=478843&mlfb=5SY4406-5"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 5SY4406-5?","answer":"The breaker carries ratings per EN 60898 (10 kA), IEC 60947-2 (35 kA AC, 15 kA DC), and UL 1077 / CSA C22.2 No.235 (5 kA). It is halogen-free and silicon-free. Standard Siemens documentation includes CE declaration, RoHS/REACH compliance statements, and the product datasheet — all available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4406-5","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/5SY4406-5 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}}