{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD8173SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD8173SD","canonicalUrl":"https://icboms.com/onsemi/FOD8173SD","factsUrl":"https://icboms.com/api/mcp/products/FOD8173SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD8173SD, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 4-SMD gull-wing package, -55°C to 110°C operating range.","salesMarkdown":"## 5 kV isolation in a 4-SMD gull-wing package The FOD8173SD is a single-channel optoisolator from onsemi's FOD817 family, offering 5000Vrms isolation between a DC input and a transistor output. ## CTR spread and switching speed Current transfer ratio spans 50% minimum to 600% maximum at 5 mA forward current — a wide range that forces the designer to check the minimum CTR at the actual operating If to guarantee the output saturates into the load.","metaTitle":"FOD8173SD onsemi Optoisolator 5kV Transistor Output 4-SMD","metaDescription":"onsemi FOD8173SD optoisolator: 5000Vrms isolation, transistor output, 50-600% CTR at 5mA, -55 to 110°C, 4-SMD gull wing. Active production. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"FOD817","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"200mV","Operating Temperature":"-55°C~110°C","Rise / Fall Time (Typ)":"4µs, 3µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"600% @ 5mA","Current Transfer Ratio (Min)":"50% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.2V","Turn On / Turn Off Time (Typ)":"-","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5400","priceTiers":[{"qty":1,"price":"$0.54000","currency":"USD"},{"qty":10,"price":"$0.33300","currency":"USD"},{"qty":100,"price":"$0.19160","currency":"USD"},{"qty":1000,"price":"$0.14997","currency":"USD"},{"qty":2000,"price":"$0.13747","currency":"USD"},{"qty":5000,"price":"$0.12497","currency":"USD"},{"qty":10000,"price":"$0.11664","currency":"USD"},{"qty":25000,"price":"$0.11248","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD8173SD/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to FOD8173SD in this Optoisolators family?","answer":"Within the FOD817 family, the base number FOD817 covers multiple CTR and package variants. The FOD8173SD is the surface-mount gull-wing variant; a through-hole DIP-4 sibling like the FOD817A would not be pin-compatible due to the different lead form."},{"question":"What does the CTR range of 50% to 600% mean for my design?","answer":"At 5 mA forward current, the output transistor can deliver anywhere from 50% to 600% of that current into the collector. The minimum CTR (50%) sets the worst-case drive capability — size the pull-up resistor and the load current so the output saturates even at the low end of the CTR spread."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD8173SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD8173SD 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}}