{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817B3S","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817B3S","canonicalUrl":"https://icboms.com/onsemi/FOD817B3S","factsUrl":"https://icboms.com/api/mcp/products/FOD817B3S","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817B3S, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 130-260% CTR at 5mA, 4-SMD Gull Wing package, -55°C to 110°C operating range.","salesMarkdown":"## Isolation and signal transfer for safety-rated designs The FOD817B3S is a single-channel optoisolator from onsemi's FOD817 family, designed to pass a DC-level logic signal across a 5000Vrms isolation barrier while the output transistor switches up to 70V at 50mA. With a current transfer ratio guaranteed between 130% and 260% at a 5mA forward current, the part provides a predictable gain window for driving downstream logic or a microcontroller input without extra amplification. ## Temperature grade and environment fit The 4-SMD Gull Wing package allows reflow soldering and a lower profile than the through-hole FOD817B, but the 200mV Vce saturation means the output drop is tight enough to keep the logic-high level above 3.3V or 5V thresholds even at 50mA load. onsemi lists the FOD817B3S as Active and ROHS3 compliant, so no near-term end-of-life watch is needed for new designs.","metaTitle":"FOD817B3S Optoisolator 5kV Transistor Output onsemi","metaDescription":"FOD817B3S onsemi optoisolator: 5000Vrms isolation, DC input, transistor output, 130-260% CTR at 5mA, -55°C to 110°C, 4-SMD Gull Wing. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","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":"$0.4500","priceTiers":[{"qty":1,"price":"$0.45000","currency":"USD"},{"qty":10,"price":"$0.27400","currency":"USD"},{"qty":100,"price":"$0.15770","currency":"USD"},{"qty":1000,"price":"$0.12344","currency":"USD"},{"qty":2000,"price":"$0.11316","currency":"USD"},{"qty":5000,"price":"$0.10287","currency":"USD"},{"qty":10000,"price":"$0.09601","currency":"USD"},{"qty":25000,"price":"$0.09258","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817B3S/alternatives.json"},"ai":{"faq":[{"question":"Is the FOD817B3S RoHS compliant?","answer":"Yes, the FOD817B3S is ROHS3 compliant, meeting the latest EU restriction directive for lead and other hazardous substances."},{"question":"What is the difference between FOD817B3S and FOD817B?","answer":"The FOD817B3S is the surface-mount version in a 4-SMD Gull Wing package, while the FOD817B is the through-hole DIP variant. All electrical ratings — 5000Vrms isolation, 130-260% CTR, 70V output, 50mA current — are identical."},{"question":"Does the FOD817B3S have a surface mount package?","answer":"Yes, it comes in a 4-SMD Gull Wing package, designed for surface-mount assembly on a PCB."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817B3S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817B3S 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}}