{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CNY173","brand":"onsemi","brandSlug":"onsemi","productSlug":"CNY173","canonicalUrl":"https://icboms.com/onsemi/CNY173","factsUrl":"https://icboms.com/api/mcp/products/CNY173","rawCanonicalId":null},"summary":{"shortDescription":"onsemi CNY173 optocoupler, 1-channel DC input, transistor with base output, 5300 Vrms isolation, 100-200% CTR at 10 mA, 6-DIP through hole, tube.","salesMarkdown":"## Isolation and signal transfer for high-voltage domains The onsemi CNY173 is a single-channel optocoupler in a 6-DIP through-hole package, designed to pass a DC signal across a 5300 Vrms isolation barrier. The transistor output with base access gives the designer flexibility to tailor switching thresholds or add a pull-up network on the secondary side. Current transfer ratio spans 100% to 200% at a forward current of 10 mA, so the output transistor saturates reliably across the full CTR spread without overdriving the LED. The 70 V output ceiling and 50 mA continuous output current handle logic-level interface and low-power load switching in industrial control and power-supply feedback loops. ## Temperature range and switching speed for industrial environments Rated for -55°C to 100°C operating ambient, the CNY173 spans the full industrial temperature band. The 1 µs rise and 2 µs fall times (typical) support switching up to a few hundred kilohertz — adequate for isolated gate drive, AC mains zero-cross detection, or serial data isolation at moderate baud rates. Turn-on and turn-off times of 2 µs and 3 µs (typical) mean the output settles within a few microseconds of the input edge. The 300 mV Vce(sat) maximum at the rated forward current keeps the on-state voltage drop low enough to drive a TTL or CMOS input without a secondary buffer. onsemi has marked the CNY173 as obsolete. No direct pin-compatible successor is listed on the official record. Independent distribution and surplus channels hold remaining inventory; quantities are lot-specific and confirmed at RFQ. For a BOM line that requires this exact 6-DIP footprint, 5300 Vrms isolation, and 100-200% CTR band, the existing stock is the only drop-in path without a board spin.","metaTitle":"onsemi CNY173 Optoisolator, 5300Vrms, 6-DIP","metaDescription":"onsemi CNY173 optocoupler, 1-channel DC input, transistor output, 5300 Vrms isolation, 100-200% CTR at 10 mA. 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 (0.300\\\", 7.62mm)","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4a47ea3b51cbb13a83c8d83e21910005.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CNY173/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/CNY173","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/CNY173 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:26:32.478Z","lastPublished":"2026-07-21T06:26:32.478Z","indexable":true}}