{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817BSD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817BSD","canonicalUrl":"https://icboms.com/onsemi/FOD817BSD","factsUrl":"https://icboms.com/api/mcp/products/FOD817BSD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817BSD, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 4-SMD gull-wing package, CTR 130%-260% @5mA.","salesMarkdown":"## 5000Vrms isolation defines the galvanic barrier The FOD817BSD from onsemi provides 5000Vrms of input-to-output isolation, which is the primary design parameter for this part — it determines the working voltage and creepage distance on the PCB. In a motor-drive or PLC digital-input module, that 5 kV rating gives enough margin to separate the 24 V field side from the 3.3 V or 5 V logic side without arcing across the isolation barrier. ## CTR range 130%–260% @5mA sets the logic interface margin Current transfer ratio is specified at 5 mA forward current: minimum 130%, maximum 260%. That spread means at 5 mA in, the output transistor can sink between 6.5 mA and 13 mA into the load. For a typical 5 V logic input with a 10 kΩ pull-up, the required sink current is only 0.5 mA — so even the minimum CTR at cold temperature and worst-case LED degradation leaves substantial margin. The 200 mV maximum Vce(sat) keeps the output voltage low enough to be recognised as a solid logic low by any standard CMOS or TTL input. Rise and fall times are 4 µs and 3 µs typical, respectively. That limits the useful switching frequency to roughly 50–100 kHz for clean pulse transmission — fine for 50/60 Hz AC zero-cross detection, relay drive, or PLC input sampling, but too slow for high-speed data or PWM above a few hundred kHz. The base product number FOD817 is a long-running onsemi series with multiple CTR and package variants, which means replacement within the family is straightforward if a different CTR bin is needed. Tape-and-reel and cut-tape options are available for both prototyping and production reels.","metaTitle":"FOD817BSD onsemi Optoisolator 5000Vrms Transistor Output","metaDescription":"onsemi FOD817BSD optoisolator: 5000Vrms isolation, 130%-260% CTR @5mA, 200mV Vce(sat), -55°C to 110°C, 4-SMD gull wing. Active lifecycle, ROHS3 compliant.","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":"$0.5800","priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.38400","currency":"USD"},{"qty":100,"price":"$0.22060","currency":"USD"},{"qty":1000,"price":"$0.17267","currency":"USD"},{"qty":2000,"price":"$0.15829","currency":"USD"},{"qty":5000,"price":"$0.14390","currency":"USD"},{"qty":10000,"price":"$0.13430","currency":"USD"},{"qty":25000,"price":"$0.12951","currency":"USD"},{"qty":50000,"price":"$0.12471","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817BSD/alternatives.json"},"ai":{"faq":[{"question":"How can I order or get a quote for FOD817BSD?","answer":"Submit an RFQ with your target quantity. The part is Active with multiple package options including tape and reel and cut tape."},{"question":"Can FOD817BSD replace PC817?","answer":"The PC817 is a similar single-channel transistor-output optoisolator, but its isolation rating is typically 5000Vrms or 3750Vrms depending on the variant, and CTR bins differ. The FOD817BSD's CTR range of 130%–260% @5mA and 200mV Vce(sat) are comparable to many PC817 grades. Verify the PC817's exact CTR bin and package (DIP vs SMD) against your BOM before substituting."},{"question":"Is FOD817BSD compatible with 5V logic?","answer":"Yes. With a minimum CTR of 130% at 5 mA forward current, the output can sink at least 6.5 mA. Driving a 5 V logic input with a 10 kΩ pull-up resistor requires only 0.5 mA sink current, so the FOD817BSD has ample margin. The 200 mV maximum Vce(sat) ensures the output voltage is well below the 0.8 V VIL(max) of standard 5 V CMOS and TTL families."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817BSD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817BSD 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}}