{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817B3SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817B3SD","canonicalUrl":"https://icboms.com/onsemi/FOD817B3SD","factsUrl":"https://icboms.com/api/mcp/products/FOD817B3SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817B3SD, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 130–260% CTR at 5 mA, 4-SMD Gull Wing surface-mount package, -55°C to 110°C operating range.","salesMarkdown":"## What the 5 kV isolation and CTR binning mean for your BOM The FOD817B3SD is an onsemi optoisolator that provides 5000Vrms galvanic isolation between a DC input and a transistor output — the kind of barrier you need in a mains-referenced power supply, motor drive, or PLC digital input where a fault on the high side must not reach the controller logic. Its current transfer ratio is binned at 130% minimum and 260% maximum at 5 mA forward current, so you get a predictable on-state collector current without overdriving the LED — that matters when you're sizing the input resistor and the pull-up on the output side. The 70 V output rating and 50 mA continuous output current handle 24 V logic rails and low-power relay coils directly, with the 200 mV Vce(sat) keeping dissipation low in the on-state. ## Package and temperature range for the board and the environment Housed in a 4-SMD Gull Wing package (supplier device package 4-SMD), this part is built for reflow soldering — the Gull Wing leads are visible for inspection and rework-friendly if you need to replace one on a populated board. ## How the FOD817B3SD compares to its CTR-bin siblings Within the FOD817 family, the suffix selects a CTR range of 130% to 260% at 5 mA — the same package and isolation as the FOD817BSD (which uses the same CTR bin) and the FOD817ASD (which uses a lower CTR bin). The difference is purely the transfer ratio window, so if your design needs a tighter or higher CTR, you swap the suffix without changing the footprint.","metaTitle":"FOD817B3SD onsemi Optoisolator – 5 kV Transistor Output","metaDescription":"onsemi FOD817B3SD optoisolator: 5000Vrms isolation, transistor output, 130-260% CTR at 5 mA, -55°C to 110°C, 4-SMD Gull Wing. Active production, 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)":"260% @ 5mA","Current Transfer Ratio (Min)":"130% @ 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":"$0.5000","priceTiers":[{"qty":1,"price":"$0.53000","currency":"USD"},{"qty":10,"price":"$0.34500","currency":"USD"},{"qty":100,"price":"$0.22840","currency":"USD"},{"qty":1000,"price":"$0.17631","currency":"USD"},{"qty":2000,"price":"$0.15932","currency":"USD"},{"qty":5000,"price":"$0.14870","currency":"USD"},{"qty":10000,"price":"$0.14339","currency":"USD"},{"qty":25000,"price":"$0.14126","currency":"USD"},{"qty":50000,"price":"$0.13542","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817B3SD/alternatives.json"},"ai":{"faq":[{"question":"Is the FOD817B3SD a direct replacement for the FOD817B?","answer":"The FOD817B3SD is a surface-mount Gull Wing variant of the FOD817B base part. The base part number FOD817 covers multiple package options; the '3SD' suffix indicates the 4-SMD Gull Wing package on tape and reel. If your BOM calls for a through-hole DIP, the FOD817B in DIP-4 is the same die in a different package — verify the mounting type before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817B3SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817B3SD 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}}