{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY171S","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY171S","canonicalUrl":"https://icboms.com/onsemi/CNY171S","factsUrl":"https://icboms.com/api/mcp/products/CNY171S","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY171S Optoisolator, DC Input, Transistor with Base Output, 1 Channel, 5300 Vrms, 6-SMD Gull Wing, Tube.","salesMarkdown":"The onsemi CNY171S is a single-channel optoisolator in a 6-SMD Gull Wing package, with a DC input driving a phototransistor output that includes a base connection for external bias or feedback. Rated for 5300 Vrms isolation, it provides reinforced galvanic isolation between the input and output circuits — sufficient for mains-referenced control loops and medical equipment where the isolation barrier must withstand a 5 kV surge test. The current transfer ratio (CTR) is specified at 40% minimum and 80% maximum, measured at If = 10 mA. This 2:1 spread means the output collector current can vary by a factor of two across parts — a design that uses the transistor in linear mode must account for the full CTR range; a saturated-switching design is less sensitive. ## Switching speed and output drive Turn-on time is 2 µs typical, turn-off time 3 µs typical, with rise and fall times of 1 µs and 2 µs respectively. This limits the practical data rate to roughly 100 kHz in a saturated-switching application — above that the output waveform degrades and the minimum pulse width is lost. The output can sink up to 50 mA continuous with a maximum Vce(sat) of 300 mV at the rated forward current. The 70 V output breakdown gives headroom for driving 24 V PLC inputs or relay coils without an external level shifter. Forward voltage is 1.35 V typical at If = 10 mA, and the absolute maximum forward current is 100 mA — the LED is not designed for pulsed drive above that without duty-cycle derating. onsemi has marked the CNY171S as Obsolete. For existing BOM lines, the CNY171S is sourced through independent distribution against an RFQ.","metaTitle":"onsemi CNY171S Optoisolator, 5300 Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY171S optoisolator, 5300 Vrms isolation, 40-80% CTR at 10 mA, 6-SMD Gull Wing. Obsolete — sourced to order against RFQ through independent channels.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","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":"$56.1800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4a47ea3b51cbb13a83c8d83e21910005.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY171S/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the CNY171S?","answer":"The CNY171S is sourced through independent distribution channels. Submit an RFQ for current availability and pricing; quantities are lot-specific and confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY171S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY171S when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:25:38.529Z","lastPublished":"2026-07-21T06:25:38.529Z","indexable":true}}