{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7406-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7406-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7406-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7406-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7406-8CC, 4-pole miniature circuit breaker, 6 A, D tripping characteristic, 30 kA (IEC 60947-2), 400 V AC.","salesMarkdown":"Under UL 1077 and CSA C22.2 No. 235 it carries a 5 kA interrupting rating, which covers most North American branch-circuit applications up to that fault level. The 4-pole configuration (4P) switches all four conductors — three phases plus neutral — with no separate neutral switching function. That matters when the neutral must be disconnected for isolation or when the load requires full four-pole protection, but it also means the neutral pole is not independently switched; it follows the phase poles. The 72 V DC maximum rating is a secondary spec — this is an AC device, and the DC rating is for low-voltage DC control circuits, not for primary DC power distribution. Mounting uses the quick-assembly system — snaps onto standard DIN rail. The 90 mm height is standard for the SENTRON 5SY7 series. Terminal blocks accept solid or stranded conductors from 0.75 mm² up to 35 mm², with screw-type terminals torqued to 2.5–3.5 N·m. Both top and bottom terminals are combined, meaning line and load can land on either end — no polarity concern for the AC circuit. Humidity tolerance is specified as max 95% at 55 °C, derating to 55% at 70 °C and 35% at 75 °C. The overvoltage category is III, confirming it is rated for fixed-installation distribution panels, not just downstream equipment.","metaTitle":"Siemens 5SY7406-8CC SENTRON MCB, 4P, 6A, D Curve, 30kA IEC","metaDescription":"Siemens SENTRON 5SY7406-8CC miniature circuit breaker, 4-pole, 6 A, D tripping characteristic, 30 kA breaking capacity per IEC 60947-2. Current lifecycle. Sourced to order.","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 ... 35 mm²","Width":"72 mm","title":"5SY7406-8CC","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 15kA, 4-pole, D, 6A","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":"-25 ... +55 °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":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"6 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 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 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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d5cdcdb3398ec45b7f931c705c7c9c33.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=199458&mlfb=5SY7406-8CC"},"ai":{"faq":[{"question":"Where can I buy 5SY7406-8CC?","answer":"The 5SY7406-8CC is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment."},{"question":"What is the closest functional second-source for 5SY7406-8CC?","answer":"Within the SENTRON family, the 5SY7140-8CC is a 4-pole D-curve MCB but rated 40 A — a different current rating entirely. The 5SY7406-8CC is a 6 A device; there is no drop-in second-source without rewiring for a different trip rating. The 5SY3132-6 is a 3-pole C-curve breaker, not a functional substitute for a 4-pole D-curve application."},{"question":"What is the depth of 5SY7406-8CC?","answer":"Depth is 76 mm. Installation depth (the dimension behind the panel face) is 70 mm. Width is 72 mm (4 modular units,), height 90 mm."},{"question":"What wire sizes does 5SY7406-8CC accept?","answer":"Terminals accept solid and stranded conductors from 0.75 mm² up to 35 mm². Screw-type terminals with tightening torque 2.5–3.5 N·m."},{"question":"What compliance documentation does Siemens provide for 5SY7406-8CC?","answer":"The breaker carries IEC 60947-2 certification (30 kA breaking capacity,) and UL 1077 / CSA C22.2 No. 235 listing (5 kA,). It is halogen-free and silicon-free. Standard Siemens documentation includes RoHS and REACH declarations; the product designation is miniature circuit breaker per the SENTRON 5SY7CC design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7406-8CC","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/5SY7406-8CC 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}}