{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817C3SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817C3SD","canonicalUrl":"https://icboms.com/onsemi/FOD817C3SD","factsUrl":"https://icboms.com/api/mcp/products/FOD817C3SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817C3SD, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 200%–400% CTR at 5 mA, –55°C to 110°C, 4-SMD gull-wing package","salesMarkdown":"## 5000Vrms isolation in a 4-SMD gull-wing package The FOD817C3SD is a single-channel phototransistor optoisolator from onsemi's FOD817 family. Its 5000Vrms isolation rating qualifies it for reinforced insulation in mains-referenced circuits — think offline power supplies, motor-drive feedback, and PLC digital inputs where the primary side runs at line voltage and the secondary side must stay galvanically separated. The DC input side drives an IR LED; the output is a phototransistor rated for 70 V collector-emitter and 50 mA continuous current. The 4-SMD gull-wing package sits flat on the board — the 0.4-inch lead span is a standard footprint shared with DIP-4 through-hole parts, so the layout swaps between the two without a board respin. ## CTR bin C – 200% to 400% at 5 mA forward current The 'C' in the order code marks the current-transfer-ratio bin: minimum 200%, maximum 400% at If = 5 mA. That 2:1 spread means the designer sizes the collector load resistor for the worst-case minimum CTR — at 200% the output transistor sinks 10 mA from a 5 mA input, which is still enough to drive a logic gate or a 5 V relay coil through a 500 Ω pull-up. The 4 µs rise / 3 µs fall times keep the switching clean up to about 50 kHz, adequate for isolated serial interfaces and low-speed PWM. Compared to the sibling FOD817ASD (CTR 80–160%) and FOD817B3SD (CTR 130–260%), the C bin gives the highest minimum gain — useful when the input drive current is limited or when the output must drive a heavier load without an external transistor. The D bin (300–600%) offers more headroom but the extra gain is rarely needed unless the LED current is below 2 mA. ## Active lifecycle and sourcing position We source the FOD817C3SD against your BOM quantity and target lead-time. No minimum order threshold beyond the reel increment.","metaTitle":"FOD817C3SD onsemi Optoisolator – 5000Vrms, Transistor Output","metaDescription":"onsemi FOD817C3SD optoisolator: 5000Vrms isolation, DC input, transistor output, 200%–400% CTR at 5 mA, –55°C to 110°C, 4-SMD gull-wing. Active lifecycle.","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)":"400% @ 5mA","Current Transfer Ratio (Min)":"200% @ 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":"$0.6000","priceTiers":[{"qty":1,"price":"$0.60000","currency":"USD"},{"qty":10,"price":"$0.36700","currency":"USD"},{"qty":100,"price":"$0.21090","currency":"USD"},{"qty":1000,"price":"$0.16507","currency":"USD"},{"qty":2000,"price":"$0.15132","currency":"USD"},{"qty":5000,"price":"$0.13756","currency":"USD"},{"qty":10000,"price":"$0.12839","currency":"USD"},{"qty":25000,"price":"$0.12381","currency":"USD"},{"qty":50000,"price":"$0.11922","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817C3SD/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy FOD817C3SD and how is it quoted?","answer":"We source the FOD817C3SD against your BOM line quantity. Submit an RFQ with your target volume and lead-time; we confirm availability and current pricing at quote time. The part is active from onsemi, so no end-of-life risk."},{"question":"Is FOD817C3SD RoHS compliant?","answer":"Yes, the FOD817C3SD is ROHS3 Compliant. No exemption declarations needed for the BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817C3SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817C3SD 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}}