{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY173W","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY173W","canonicalUrl":"https://icboms.com/onsemi/CNY173W","factsUrl":"https://icboms.com/api/mcp/products/CNY173W","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY173W optoisolator, single-channel DC-input transistor-with-base output, 5300Vrms isolation, 100-200% CTR at 10mA, 70V output, 50mA/ch, through-hole 6-DIP (0.400\", 10.16mm), tube.","salesMarkdown":"## Isolation barrier and switching performance The CNY173W delivers 5300Vrms isolation between input and output, a rating suited for reinforced isolation in mains-referenced circuits — the 6-DIP package provides the creepage distance to sustain this voltage without tracking. Switching is characterised by 1µs rise and 2µs fall times, with turn-on at 2µs and turn-off at 3µs typical — fast enough for isolated feedback in 50/60 Hz power supplies or low-speed logic interfaces. The transistor-with-base output allows the designer to bias the base for optimised switching speed or to use the phototransistor in a common-base configuration, trading gain for bandwidth. ## Current transfer ratio and drive margins CTR is specified at 100% minimum and 200% maximum, both at If=10mA — this guarantees the output transistor saturates with a 10mA LED drive, leaving margin for LED ageing over temperature. Maximum forward current is 100 mA, and the typical forward voltage is 1.35V — the LED can be driven directly from a 3.3V logic output through a series resistor without a separate driver stage. Output saturation voltage is 300mV max at the rated collector current, keeping the logic-low level well within TTL thresholds when the output is pulled up to 5V through a resistor. For a BOM line that depends on the 5300Vrms isolation and through-hole DIP-6 footprint, the CNY173W remains orderable as long as surplus inventory exists; a board redesign would be required to migrate to a different package or isolation class.","metaTitle":"onsemi CNY173W Optoisolator, 5300Vrms, 6-DIP","metaDescription":"onsemi CNY173W optoisolator, 5300Vrms isolation, 100-200% CTR at 10mA, 70V output, 50mA/ch, through-hole DIP-6. Obsolete — sourced to order.","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":"CNY173","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-55°C~100°C","Rise / Fall Time (Typ)":"1µs, 2µs","Voltage - Output (Max)":"70V","Supplier Device Package":"6-DIP","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)":"100 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4a47ea3b51cbb13a83c8d83e21910005.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY173W/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy CNY173W and how do I get a price?","answer":"The CNY173W is obsolete and sourced through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY173W","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY173W when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:27:38.453Z","lastPublished":"2026-07-21T06:27:38.453Z","indexable":true}}