{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY174SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY174SD","canonicalUrl":"https://icboms.com/onsemi/CNY174SD","factsUrl":"https://icboms.com/api/mcp/products/CNY174SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY174SD Optoisolator, DC Input, Transistor with Base Output, 1 Channel, 5300Vrms Isolation, 160-320% CTR, 6-SMD Gull Wing, Tape & Reel.","salesMarkdown":"onsemi has marked the CNY174SD as Obsolete. ## 5300Vrms isolation with a wide CTR window The CNY174SD provides 5300Vrms of galvanic isolation, which is a standard rating for reinforced insulation in mains-connected industrial control, medical equipment, and power-supply feedback loops. This wide CTR spread means the designer must budget for the low end when calculating the LED drive current needed to guarantee a logic-level output at the receiver, and the high end when sizing the pull-up resistor to avoid saturation at the output transistor. ## 70V output, 50mA drive, and -55°C to 100°C range The output transistor is rated for a maximum collector-emitter voltage of 70V and can sink up to 50mA continuous per channel. This voltage rating suits 24V and 48V industrial logic rails with margin, while the 50mA drive handles typical PLC input modules, relay coils, or DC solid-state relay gates without an external buffer. ## 6-SMD Gull Wing package, DC input, transistor output Housed in a 6-pin SMD Gull Wing package, the CNY174SD is a surface-mount phototransistor optocoupler with a DC input and a transistor-with-base output. The base pin is brought out, allowing the designer to add a base-emitter resistor for improved noise immunity or to tailor the switching speed. The 1µs rise and 2µs fall times and 2µs turn-on / 3µs turn-off times place this part in the medium-speed class, suitable for 10-100 kbps data isolation or PWM feedback at switching frequencies up to a few tens of kilohertz.","metaTitle":"onsemi CNY174SD Optoisolator, 5300Vrms, 160-320% CTR, 6-SMD","metaDescription":"onsemi CNY174SD optoisolator, obsolete. 5300Vrms isolation, 160-320% CTR at 10mA, 70V output, -55°C to 100°C.","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/CNY174SD/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to CNY174SD?","answer":"No official cross-reference or pin-compatible alternative is listed by onsemi for the CNY174SD. The base product number is CNY174, and other members of the CNY174 family share the same 6-SMD Gull Wing footprint and pinout, but their CTR bins, isolation ratings, or temperature grades may differ. A parametric search against the 160-320% CTR range, 5300Vrms isolation, and -55°C to 100°C temperature range is the recommended path to identify a functional equivalent."},{"question":"What compliance documentation does onsemi provide for CNY174SD?","answer":"As an obsolete part, the original onsemi datasheet and PCN documentation are the authoritative sources for any compliance declarations that were issued at the time of manufacture. The part is sourced through independent distribution; compliance documentation is confirmed at the time of the RFQ against the specific lot or date code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY174SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY174SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:28:10.821Z","lastPublished":"2026-07-21T06:28:10.821Z","indexable":true}}