{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY171SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY171SD","canonicalUrl":"https://icboms.com/onsemi/CNY171SD","factsUrl":"https://icboms.com/api/mcp/products/CNY171SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY171SD Optoisolator, DC input, Transistor with Base output, 5300Vrms isolation, 40-80% CTR, 6-SMD Gull Wing package, Tape & Reel.","salesMarkdown":"onsemi has marked the CNY171SD as Obsolete. ## 5300 Vrms isolation — the fit for reinforced safety barriers The CNY171SD provides 5300 Vrms galvanic isolation between input and output. That rating qualifies it for reinforced insulation in mains-connected circuits — think AC-DC power supplies, motor drive feedback paths, or any interface where the low-voltage control side must be protected from a high-voltage bus. The 1 µs rise and 2 µs fall times are fast enough for 100 kHz switching signals but not for high-speed data links; this is a general-purpose optocoupler, not a digital isolator. ## CTR window and drive current — what 40-80% at 10 mA means That means at 10 mA LED drive, the output transistor can sink between 4 mA and 8 mA — enough to drive a logic gate input or a low-power relay coil directly. The 300 mV max Vce saturation keeps the on-state voltage drop low, so the output stays in the linear region for the full 50 mA rated output current. For designs that need tighter CTR binning, the CNY17 family offers graded options; the 'SD' suffix here is the standard wide-bin part. The gull-wing leads are surface-mount, compatible with standard reflow profiles. Tape & Reel packaging suits automated pick-and-place.","metaTitle":"CNY171SD onsemi Optoisolator, 5300Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY171SD optocoupler, 5300Vrms isolation, 40-80% CTR at 10mA, -55°C to 100°C. Obsolete — sourced to order via independent channels. Request quote.","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":"CNY171","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)":"80% @ 10mA","Current Transfer Ratio (Min)":"40% @ 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/CNY171SD/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to CNY171SD?","answer":"The CNY17 family includes graded CTR variants (e.g., CNY17-1, CNY17-2, CNY17-3) that share the same 6-SMD Gull Wing footprint and 5300 Vrms isolation, but the 'SD' suffix is a standard-bin part with no direct drop-in listed. A BOM review against the required CTR window and output current is recommended before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY171SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY171SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:25:39.582Z","lastPublished":"2026-07-21T06:25:39.582Z","indexable":true}}