{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5406-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5406-6","canonicalUrl":"https://aoctrl.com/siemens/5SY5406-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5406-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5 series, miniature circuit breaker, 4-pole, B-curve, 6 A, 10 kA at 400 V AC, 72 mm wide.","salesMarkdown":"## What this 4-pole B-curve 6 A MCB is for The Siemens SENTRON 5SY5406-6 is a 4-pole miniature circuit breaker rated 6 A with a B tripping characteristic, breaking 10 kA per EN 60898 at 400 V AC. The 4-pole version (4P) switches all four conductors, so it fits three-phase plus neutral applications in distribution boards or sub-panels. Rated 880 V DC as well, with a 10 kA DC breaking capacity per EN 60898-2, so it also covers DC combiner boxes or battery circuits. At 72 mm wide (4 width units of 18 mm), it occupies four adjacent slots in a standard distribution board. Mount in any position; ambient range -40 to +70 °C, storage down to -75 °C. The 10 kA breaking capacity at 400 V AC (per EN 60898) tells you this MCB can safely interrupt a fault current up to 10,000 A without welding its contacts or exploding — standard for most commercial and light industrial distribution boards where the prospective short-circuit current stays under that threshold. The B-curve (3-5× In) avoids nuisance tripping on resistive loads but will trip fast on a hard short. Energy limiting class 3 means it restricts let-through energy well, protecting downstream equipment.","metaTitle":"Siemens SENTRON 5SY5406-6 MCB, 4P B 6A 10kA, 400V AC","metaDescription":"Siemens SENTRON 5SY5406-6 miniature circuit breaker, 4-pole, B-curve, 6 A, 10 kA breaking capacity at 400 V AC. 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":"5SY5406-6","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Circuit breaker Universal current 880 V DC 400 V AC 10kA, 4-pole, B, 6A max. 1000 V DC","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC/DC","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","at DC / rated value":"880 V","Overvoltage category":"II","Combined Terminal Top":"Yes","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","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY5","Suitability for operation":"universal current","at DC / acc. to EN 60898-2":"10 kA","Current / at AC / rated value":"6 A","Tripping characteristic class":"B","at DC / rated value / maximum":"1 000 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"AC as required, observe DC 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":"15 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/87ef3710ae802bd671070a8153fdc89a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=145118&mlfb=5SY5406-6"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY5406-6?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our independent distribution channels; we source it to order."},{"question":"What is 5SY5406-6's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm. That extra 6 mm is the front protrusion of the toggle and terminal covers."},{"question":"What is 5SY5406-6's listed solid (0.75... 35 mm²) on this component line?","answer":"The terminals accept solid conductors from 0.75 mm² up to 35 mm². Stranded conductors also span the same range, so you can land fine-stranded wire with a ferrule in the same clamp."},{"question":"What compliance documentation does this brand provide for 5SY5406-6?","answer":"The MCB is designed to EN 60898 (AC breaking) and EN 60898-2 (DC breaking). It carries the Siemens SENTRON brand with touch protection, halogen-free and silicon-free materials. Specific RoHS/REACH declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5406-6","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/5SY5406-6 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}}