{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY172SM","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY172SM","canonicalUrl":"https://icboms.com/onsemi/CNY172SM","factsUrl":"https://icboms.com/api/mcp/products/CNY172SM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY172SM optoisolator, 1-channel DC input, transistor with base output, 4170 Vrms isolation, 63-125% CTR, 70 V output, 6-SMD Gull Wing package, tube.","salesMarkdown":"The onsemi CNY172SM is a 1-channel optoisolator with a phototransistor output that includes a base connection — that base pin lets you bias the transistor for faster switching or lower saturation, or leave it floating for standard transistor operation. Its 4170 Vrms isolation rating means it can safely bridge a 400 VAC power stage and a 5 V logic controller with enough margin for transient overvoltages — common in motor-drive feedback, SMPS secondary sensing, and PLC digital input isolation. The current transfer ratio (CTR) is specified at 63% minimum and 125% maximum when you drive the LED with 10 mA forward current — that 2:1 spread means the output current at the same input can vary by a factor of two across parts, so downstream logic should be a Schmitt trigger or comparator, not a direct TTL gate. Switching is rated at 4 µs rise and 3.5 µs fall (max), with turn-on at 2 µs and turn-off at 3 µs — fast enough for 10 kHz PWM or 115 kbps serial isolation, but not for high-speed isolated SPI or CAN FD. ## Package and hand-solder reality The tube packaging means parts arrive in a rigid anti-static tube, not on a reel — fine for prototyping and low-volume builds, but if your pick-and-place line expects tape-and-reel, you'll need to transfer or order a reeled variant from the same base family. ROHS3 compliant with no exemptions, meaning fully lead-free and compatible with EU RoHS and global environmental regulations — no waiver paperwork needed.","metaTitle":"onsemi CNY172SM Optoisolator, 4170 Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY172SM optoisolator: 4170 Vrms isolation, 63-125% CTR, 70 V output, 6-SMD Gull Wing. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","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":"Active","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-SMD","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":"$0.6600","priceTiers":[{"qty":1,"price":"$0.66000","currency":"USD"},{"qty":10,"price":"$0.43100","currency":"USD"},{"qty":100,"price":"$0.28510","currency":"USD"},{"qty":1000,"price":"$0.22014","currency":"USD"},{"qty":2000,"price":"$0.19892","currency":"USD"},{"qty":5000,"price":"$0.18566","currency":"USD"},{"qty":10000,"price":"$0.17903","currency":"USD"},{"qty":25000,"price":"$0.17638","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/dbff72ad709f03fb6695b1cadd7ed9fe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY172SM/alternatives.json"},"ai":{"faq":[{"question":"Will CNY172SM drop into a panel that was specified around 4N25SR2M without rewiring?","answer":"Both are 1-channel optoisolators in a 6-SMD Gull Wing package with transistor-with-base output and 4170 Vrms isolation. The 4N25SR2M has a slightly higher Vce saturation (500 mV vs 400 mV) and a wider CTR spread, but the pinout and footprint are the same — no board respin needed."},{"question":"What compliance documentation does onsemi provide for CNY172SM?","answer":"The part is ROHS3 Compliant (fully lead-free) and carries a standard onsemi datasheet with isolation, CTR, and switching specs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY172SM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY172SM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}