{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817ASD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817ASD","canonicalUrl":"https://icboms.com/onsemi/FOD817ASD","factsUrl":"https://icboms.com/api/mcp/products/FOD817ASD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817ASD, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 4-SMD gull-wing surface-mount package, 80% to 160% CTR at 5mA, -55°C to 110°C operating range.","salesMarkdown":"The FOD817ASD provides 5000Vrms isolation between input and output, which qualifies it for mains-referenced feedback loops in off-line power supplies and for isolating logic signals in motor-drive or IGBT gate-drive circuits where the secondary side sits at a high common-mode voltage. The current transfer ratio is specified at 80% minimum and 160% maximum at a forward current of 5mA — this 2:1 spread means the output transistor's collector current for a given input current is guaranteed to fall within that band, so you can size the pull-up resistor at the collector to ensure the output saturates (Vce below 200mV) across the full CTR range and temperature. ## Temperature grade and switching speed Rated for -55°C to 110°C ambient, this part fits industrial control cabinets, outdoor telecom enclosures, and engine-bay-adjacent electronics where the board sees sustained heat — the 110°C ceiling is above the typical 85°C industrial limit, giving margin in a 70°C ambient with self-heating. Rise and fall times are 4µs and 3µs typical respectively — adequate for 10–100 kHz switching power supply feedback or low-speed serial isolation (e.g., 115.2 kbps UART), but not fast enough for high-speed digital isolation where you would look at a logic-output optocoupler.","metaTitle":"FOD817ASD onsemi Optoisolator, 5kVrms, 80-160% CTR, SMD","metaDescription":"onsemi FOD817ASD optoisolator, 5000Vrms isolation, transistor output, 80-160% CTR at 5mA, -55°C to 110°C, 4-SMD gull wing. Active lifecycle, ROHS3.","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)":"160% @ 5mA","Current Transfer Ratio (Min)":"80% @ 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":"$0.6400","priceTiers":[{"qty":1,"price":"$0.64000","currency":"USD"},{"qty":10,"price":"$0.39300","currency":"USD"},{"qty":100,"price":"$0.22580","currency":"USD"},{"qty":1000,"price":"$0.17671","currency":"USD"},{"qty":2000,"price":"$0.16199","currency":"USD"},{"qty":5000,"price":"$0.14726","currency":"USD"},{"qty":10000,"price":"$0.13744","currency":"USD"},{"qty":25000,"price":"$0.13253","currency":"USD"},{"qty":50000,"price":"$0.12762","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1beb81cf5e1c85358f551e0cb2f7b048.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817ASD/alternatives.json"},"ai":{"faq":[{"question":"Is the FOD817ASD obsolete or end-of-life?","answer":"No PCN or EOL notice has been published for this order code."},{"question":"What is the difference between FOD817A and FOD817ASD?","answer":"The base product number is FOD817 for both. The 'ASD' suffix indicates the specific CTR bin (80–160% at 5mA) and the surface-mount 4-SMD gull-wing package on Tape & Reel. The 'A' alone is a broader family designator; the full order code must match the BOM's CTR and package requirements."},{"question":"When sourcing FOD817ASD, what is the closest functional second-source?","answer":"Within the same FOD817 family, the FOD817B3SD, FOD817DSD, and FOD817BSD share the same 5000Vrms isolation, transistor output, and 4-SMD package — the difference is the CTR bin. The FOD817ASD's 80–160% range is the widest; other suffixes have narrower or shifted CTR windows. Confirm the CTR requirement on your schematic before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817ASD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817ASD 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}}