{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY1743SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY1743SD","canonicalUrl":"https://icboms.com/onsemi/CNY1743SD","factsUrl":"https://icboms.com/api/mcp/products/CNY1743SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY1743SD optoisolator, DC input, transistor with base output, 5300Vrms isolation, 160-320% CTR at 10mA, 6-SMD gull wing, tape and reel.","salesMarkdown":"The CNY1743SD is officially obsolete per onsemi's lifecycle status. No stock-holding claim; availability verified per order. ## Isolation and signal transfer Rated for 5300Vrms isolation — this is the reinforced insulation class for mains-separated circuits in industrial PSUs, motor drives, and PLC I/O modules. Current transfer ratio spans 160% to 320% at 10 mA forward current — the wide min-max spread means the downstream logic must tolerate the full range without false triggering or saturation. Output transistor is rated for 70 V collector-emitter and 50 mA continuous current, with a 300 mV Vce(sat) max — suitable for switching 24 V PLC inputs or 5 V logic rails at moderate speed. 6-SMD gull wing package — the leads are formed outward for visual solder inspection and rework with a standard iron. No hot-air station needed for removal. Supplied in tape and reel (TR) — compatible with automated pick-and-place. The 6-SMD footprint is shared across the CNY174 family; a board already laid out for a through-hole DIP-6 variant will need a pad pattern change.","metaTitle":"onsemi CNY1743SD Optoisolator, 5300Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY1743SD optoisolator, 5300Vrms isolation, 160-320% CTR at 10mA, 6-SMD gull wing. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tape & Reel (TR)","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"CNY174","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-55°C~100°C","Rise / Fall Time (Typ)":"1µs, 2µs","Voltage - Output (Max)":"70V","Supplier Device Package":"6-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"320% @ 10mA","Current Transfer Ratio (Min)":"160% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.35V","Turn On / Turn Off Time (Typ)":"2µs, 3µs","Current - DC Forward (If) (Max)":"100 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4a47ea3b51cbb13a83c8d83e21910005.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY1743SD/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy CNY1743SD and how do I get a price?","answer":"The part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — no stock-holding claim is made here."},{"question":"What is the closest pin-compatible alternative to CNY1743SD in this Optoisolators family?","answer":"The CNY174 base product number shares the same family, but each suffix may differ in CTR bin or package — verify the specific order code against your BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY1743SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY1743SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:28:06.107Z","lastPublished":"2026-07-21T06:28:06.107Z","indexable":true}}