{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY174M","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY174M","canonicalUrl":"https://icboms.com/onsemi/CNY174M","factsUrl":"https://icboms.com/api/mcp/products/CNY174M","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY174M single-channel DC-input optoisolator, transistor with base output, 4170Vrms isolation, 160-320% CTR, 70V output, 6-DIP through-hole package, tube.","salesMarkdown":"## Isolation and signal transfer in a 6-DIP footprint The onsemi CNY174M is a single-channel optoisolator that bridges a DC input LED to a phototransistor output with base access, all in a standard 6-DIP through-hole package. Its 4170Vrms isolation rating meets the reinforced insulation requirements for separating low-voltage control circuits from higher-voltage power stages or field wiring. ## CTR and switching speed — what they mean for the BOM The current transfer ratio spans 160% minimum to 320% maximum at a 10mA forward current — this is the gain margin you budget for LED degradation over temperature and lifetime. A CTR of 160% means the output transistor can sink at least 16mA when the LED is driven at 10mA, which is enough to pull a standard 5V logic input low through a 330-ohm pull-up. Switching is not fast: typical turn-on is 2µs, turn-off 3µs, with rise and fall times of 4µs and 3.5µs respectively. This limits the part to DC-level or low-frequency signal isolation — think status feedback, relay coil drives, or 50/60Hz zero-cross detection. At data rates above about 100 kbps the pulse-width distortion becomes unacceptable. The output transistor is rated for 70V collector-emitter and 50mA continuous current — enough to drive a small relay or a PLC input module directly without a buffer transistor. ## Active lifecycle and industrial temperature range The base terminal on the output side allows the designer to bias the phototransistor for faster turn-off or to configure a Darlington pair for higher current gain, though the base is often left open in simple switch applications. ## Package, mounting, and supply format Supplied in tube format, the 6-DIP (0.300-inch, 7.62mm pitch) through-hole package is a legacy footprint that remains common in industrial control boards where wave-solder assembly is the standard. The 7.62mm row spacing matches the standard DIP socket or plated-through-hole layout — no board redesign needed if replacing an older 6-DIP opto.","metaTitle":"onsemi CNY174M Optoisolator, 4170Vrms, 6-DIP","metaDescription":"onsemi CNY174M single-channel DC-input transistor-output optoisolator. 4170Vrms isolation, 160-320% CTR at 10mA, 70V output, 6-DIP through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"CNY174","Voltage - Isolation":"4170Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-40°C~100°C","Rise / Fall Time (Typ)":"4µs, 3.5µs (Max)","Voltage - Output (Max)":"70V","Supplier Device Package":"6-DIP","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)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6200","stockQuantity":18,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/dbff72ad709f03fb6695b1cadd7ed9fe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) range for the CNY174M?","answer":"The CTR is specified at 160% minimum to 320% maximum, tested at a forward current of 10mA. This range means the output phototransistor sinks between 16mA and 32mA when the LED is driven at 10mA, giving the designer a 2:1 margin for LED degradation over temperature and time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY174M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY174M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}