{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD814ASD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD814ASD","canonicalUrl":"https://icboms.com/onsemi/FOD814ASD","factsUrl":"https://icboms.com/api/mcp/products/FOD814ASD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD814ASD, 1-channel optoisolator, 5000Vrms isolation, AC/DC input, transistor output, 50-150% CTR at 1 mA, -55°C to 105°C, 4-SMD gull wing, Tape & Reel / Cut Tape.","salesMarkdown":"## 5000Vrms isolation with AC/DC input flexibility The FOD814ASD is an onsemi optoisolator rated for 5000Vrms isolation in a 4-SMD gull-wing package. Its input accepts both AC and DC, which means a single part can sense line-voltage zero-crossings or DC logic levels without a separate bridge rectifier — a practical advantage for motor-drive feedback and industrial PLC input modules. ## CTR at low forward current drives the LED budget Current transfer ratio is specified at 1 mA forward current: minimum 50%, maximum 150%. At 1 mA the LED draws well under the 50 mA absolute maximum, keeping the input-side power budget tight. The 70 V output rating and 50 mA output current cover most 24 V logic rails and relay-coil interfaces. ## Industrial temperature range and switching speed Operating temperature spans -55°C to 105°C, suiting outdoor telecom cabinets and factory-floor enclosures where ambient can hit 85°C. Typical rise and fall times are 4 µs and 3 µs — fast enough for 10 kHz switching or optocoupler-based serial links, but not for high-speed digital isolation. ## Active production, ROHS3 compliant onsemi lists the FOD814ASD as Active with ROHS3 compliance.","metaTitle":"FOD814ASD Optoisolator – 5000Vrms, AC/DC Input","metaDescription":"FOD814ASD onsemi optoisolator: 5000Vrms isolation, AC/DC input, transistor output, 50-150% CTR at 1 mA, -55°C to 105°C, 4-SMD gull wing, Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"AC, DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"200mV","Operating Temperature":"-55°C ~ 105°C","Rise / Fall Time (Typ)":"4µs, 3µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"150% @ 1mA","Current Transfer Ratio (Min)":"50% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.71","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.71000","currency":"USD"},{"qty":10,"price":"$0.46100","currency":"USD"},{"qty":100,"price":"$0.30190","currency":"USD"},{"qty":1000,"price":"$0.23831","currency":"USD"},{"qty":2000,"price":"$0.22242","currency":"USD"},{"qty":5000,"price":"$0.21448","currency":"USD"},{"qty":10000,"price":"$0.21130","currency":"USD"},{"qty":25000,"price":"$0.20653","currency":"USD"},{"qty":50000,"price":"$0.19859","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does FOD814ASD accept AC input, and how does that differ from DC-only optoisolators like the FOD817ASD?","answer":"Yes, the FOD814ASD accepts both AC and DC input. The FOD817ASD is DC-only. For AC line sensing — 50/60 Hz zero-cross detection or phase-angle measurement — the FOD814ASD eliminates the need for an external bridge rectifier, saving board space and BOM cost."},{"question":"What is the current transfer ratio (CTR) range for FOD814ASD?","answer":"This relatively tight binning means less variation in output drive strength across temperature and production lots, simplifying worst-case margin analysis in the receiver circuit."},{"question":"Is FOD814ASD a direct replacement for FOD814A3SD?","answer":"The FOD814A3SD shares the same AC/DC input, transistor output, 5000Vrms isolation, and 4-SMD gull-wing package. The key difference is the suffix — 'SD' indicates Tape & Reel packaging, while 'A3SD' may carry a different CTR bin or temperature range. Verify the CTR and temp specs against your design before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD814ASD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD814ASD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:14.318Z","lastPublished":"2026-07-17T20:07:14.318Z","indexable":true}}