{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY172TM","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY172TM","canonicalUrl":"https://icboms.com/onsemi/CNY172TM","factsUrl":"https://icboms.com/api/mcp/products/CNY172TM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY172TM optoisolator, single-channel DC-input phototransistor with base, 4170Vrms isolation, 6-DIP through-hole package, 63-125% CTR at 10mA, -40°C to 100°C.","salesMarkdown":"The CNY172TM is listed as Obsolete by onsemi, meaning the manufacturer has discontinued production. This part is sourced to order through independent distribution channels. ## Isolation rating and switching performance Rated for 4170Vrms isolation, the CNY172TM provides reinforced insulation suitable for mains-isolated feedback, motor-drive gate drive, and industrial sensor interfaces where safety isolation is required. Switching speeds of 2 µs turn-on and 3 µs turn-off (typical), with 4 µs rise and 3.5 µs fall times, position this optocoupler for moderate-speed digital signals — PLC input modules, relay drivers, and logic-level translation up to a few hundred kilohertz. ## Current transfer ratio and drive margins The CTR range of 63% to 125% at 10 mA forward current gives the designer a known spread to budget for LED aging and temperature drift. At the minimum CTR, a 10 mA LED drive yields at least 6.3 mA collector current — enough to saturate a downstream logic gate or relay coil with margin. Maximum forward current is 60 mA, and the output transistor can sink up to 50 mA continuous at 70 V Vce — adequate for driving small relays, opto-isolated solid-state switches, or level-shifting 5 V logic to 24 V industrial rails. Housed in a 6-DIP package with 0.400-inch (10.16 mm) lead spacing, the CNY172TM fits standard through-hole PCB layouts. The supplier device package is 6-DIP, identical to the package/case — no footprint variation. The DC input type and transistor-with-base output are the classic phototransistor topology, compatible with most common optocoupler drive circuits.","metaTitle":"onsemi CNY172TM Optoisolator, 4170Vrms, 6-DIP, Obsolete","metaDescription":"onsemi CNY172TM optoisolator, 4170Vrms isolation, 63-125% CTR at 10mA, 6-DIP through-hole. Obsolete — sourced to order against RFQ via 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":"Through Hole","Package / Case":"6-DIP (0.400\\\", 10.16mm)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"CNY172","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)":"125% @ 10mA","Current Transfer Ratio (Min)":"63% @ 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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/dbff72ad709f03fb6695b1cadd7ed9fe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY172TM/alternatives.json"},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) range of CNY172TM?","answer":"The CTR is specified as 63% minimum and 125% maximum at 10 mA forward current, giving a known design margin for LED aging and temperature effects."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY172TM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY172TM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:26:34.322Z","lastPublished":"2026-07-21T06:26:34.322Z","indexable":true}}