{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY173FM","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY173FM","canonicalUrl":"https://icboms.com/onsemi/CNY173FM","factsUrl":"https://icboms.com/api/mcp/products/CNY173FM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY173FM optoisolator, 1-channel DC input, transistor with base output, 4170Vrms isolation, 100-200% CTR, 6-SMD Gull Wing package, Tube.","salesMarkdown":"## Obsolete — sourcing reality for the BOM The CNY173FM is marked Obsolete by onsemi. ## 4170 Vrms isolation and CTR range Rated for 4170 Vrms isolation between input and output — this is a reinforced-grade isolation level for mains-referenced circuits, suitable for industrial power supplies, motor-drive feedback, and medical equipment where the safety barrier must withstand a 4 kV surge without breakdown. The current transfer ratio (CTR) is specified at 100% minimum to 200% maximum, tested at 10 mA forward current. That range tells you the LED-to-phototransistor gain spread across production lots: a 100% CTR means the output collector current equals the input LED current at the test point; 200% means the output can sink twice the input. For a logic-level interface, the lower bound is the one that governs the pull-up resistor and noise margin — design for 100% CTR and the 200% parts just saturate harder. ## Switching speed and output ratings Turn-on time is 2 µs typical, turn-off 3 µs typical; rise and fall times are 4 µs and 3.5 µs maximum respectively. That puts the useful data rate around 100 kHz — fine for 50/60 Hz zero-crossing detection, relay-driver isolation, or slow digital status feedback, but not for high-speed serial links. The output transistor is rated for 70 V Vce(max) and 50 mA continuous collector current. The 400 mV Vce(sat) at the rated current means the output drops less than half a volt when saturated — the downstream logic sees a clean low state. Forward voltage is 1.35 V typical at 10 mA, with an absolute maximum DC forward current of 60 mA. ## Package and temperature grade Surface-mount 6-SMD Gull Wing package, supplier device package 6-SMD. The Gull Wing leads are solderable with standard reflow profiles and allow visual inspection of the solder joints after assembly. The part ships in Tube packaging.","metaTitle":"onsemi CNY173FM Optoisolator, 4170Vrms, 6-SMD Gull Wing","metaDescription":"onsemi CNY173FM optoisolator, 1-channel DC input, transistor output, 4170Vrms isolation, 100-200% CTR. Obsolete — sourced to order against RFQ.","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":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Product Status":"Obsolete","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":null},"links":{"datasheetUrl":"https://cdn.icboms.com/dbff72ad709f03fb6695b1cadd7ed9fe.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY173FM/alternatives.json"},"ai":{"faq":[{"question":"What package does the CNY173FM come in?","answer":"6-SMD Gull Wing surface-mount package, also referred to as 6-SMD. It ships in Tube packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY173FM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY173FM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:26:50.350Z","lastPublished":"2026-07-21T06:26:50.350Z","indexable":true}}