{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY173SM","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY173SM","canonicalUrl":"https://icboms.com/onsemi/CNY173SM","factsUrl":"https://icboms.com/api/mcp/products/CNY173SM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY173SM optoisolator, 1-channel, DC input, transistor with base output, 4170Vrms isolation, 6-SMD gull wing package, tube.","salesMarkdown":"## Isolation and signal transfer for industrial boards The CNY173SM: Its current transfer ratio (CTR) is specified at 100% minimum and 200% maximum when the LED is driven at 10mA — this range tells you the output transistor's collector current relative to the input current, so a 10mA input guarantees at least 10mA of drive at the output side, which is enough to saturate a logic input or a small relay coil without extra gain stages. The output transistor can handle up to 70V across the collector-emitter and sink 50mA continuously, with a saturation voltage of just 400mV at full drive — that keeps the power dissipation low when switching a 5V or 12V PLC input module. Switching is clean: typical turn-on time is 2µs and turn-off is 3µs, with rise and fall times of 4µs and 3.5µs respectively — fast enough for 100kHz-level data or PWM signals without distorting the pulse width. ## Package, footprint, and temperature grade Housed in a 6-SMD gull-wing package (supplier device package 6-SMD), the CNY173SM is designed for surface-mount assembly on a standard PCB footprint — the gull-wing leads are hand-solderable with a fine-tip iron or a hot-air station, and the 1.27mm pitch gives you room to probe or rework without a microscope. It ships in a tube, which is the standard handling format for pick-and-place lines that feed from tube magazines — if your line uses tape-and-reel, check with your distributor about alternate packaging options at quote time.","metaTitle":"onsemi CNY173SM Optoisolator, 4170Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY173SM optoisolator, 4170Vrms isolation, 100-200% CTR at 10mA, 70V output, 6-SMD gull wing. Active, 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":"CNY173","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)":"200% @ 10mA","Current Transfer Ratio (Min)":"100% @ 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":"$0.6800","priceTiers":[{"qty":1,"price":"$0.68000","currency":"USD"},{"qty":10,"price":"$0.44600","currency":"USD"},{"qty":100,"price":"$0.29210","currency":"USD"},{"qty":1000,"price":"$0.23058","currency":"USD"},{"qty":2000,"price":"$0.21521","currency":"USD"},{"qty":5000,"price":"$0.20752","currency":"USD"},{"qty":10000,"price":"$0.20445","currency":"USD"},{"qty":25000,"price":"$0.19984","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/dbff72ad709f03fb6695b1cadd7ed9fe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY173SM/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the CNY173SM?","answer":"The 4N25SR2M is a common cross-shop candidate — it shares the same DC input, transistor-with-base output, single-channel configuration, surface-mount package, and a similar 4170Vrms isolation rating. The main difference is that the 4N25SR2M has a higher Vce saturation (500mV vs 400mV) and is typically supplied in tape-and-reel rather than tube. For a direct drop-in without rewiring, confirm the CTR range and switching speed match your application's timing budget."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY173SM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY173SM 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}}