{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD814S","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD814S","canonicalUrl":"https://icboms.com/onsemi/FOD814S","factsUrl":"https://icboms.com/api/mcp/products/FOD814S","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD814S optoisolator, 1-channel, AC/DC input, transistor output, 5000Vrms isolation, 4-SMD Gull Wing package, tube.","salesMarkdown":"## Active optoisolator with AC/DC input flexibility The onsemi FOD814S is an active-production, 1-channel optoisolator that accepts both AC and DC input, making it suitable for line-voltage zero-crossing detection or DC logic isolation in a single BOM line. Rated for 5000Vrms isolation, it provides reinforced galvanic separation between the primary and secondary circuits, which is the deciding parameter for meeting IEC 60950-1 or IEC 62368-1 clearance in an isolated power supply or PLC input module. ## Current-transfer ratio and switching performance The current-transfer ratio (CTR) spans 20% minimum to 300% maximum at a forward current of 1 mA, which defines the LED drive budget: a 1 mA input can saturate the output transistor, but at the low end of the CTR range a higher input current or a pull-up resistor adjustment is needed to guarantee the logic level at the receiver. Typical rise and fall times of 4 µs and 3 µs respectively set the practical switching ceiling — for a 10 kHz PWM or a 115.2 kbps serial isolator the output slew will track the input, but above 50 kHz the propagation skew between channels becomes a timing-closure risk. ## Package and thermal operating envelope The operating temperature range of -55°C to 105°C covers industrial and some military/aerospace ambient conditions; the 105°C upper limit is the junction temperature boundary — above this the CTR degrades and the isolation lifetime shortens per the Arrhenius model in the onsemi reliability report. Supplied in tube packaging, the part is compatible with tube-fed pick-and-place machines; for reel-fed lines a tape-and-reel variant may be preferred, but the tube format is standard for prototype and low-volume builds.","metaTitle":"onsemi FOD814S Optoisolator, 5000Vrms, Transistor Output","metaDescription":"Active onsemi FOD814S optoisolator, 5000Vrms isolation, 20-300% CTR at 1mA, AC/DC input, -55 to 105°C. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","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)":"300% @ 1mA","Current Transfer Ratio (Min)":"20% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.64","stockQuantity":17,"priceTiers":[{"qty":1,"price":"$0.64000","currency":"USD"},{"qty":10,"price":"$0.42200","currency":"USD"},{"qty":100,"price":"$0.27900","currency":"USD"},{"qty":1000,"price":"$0.21544","currency":"USD"},{"qty":2000,"price":"$0.19468","currency":"USD"},{"qty":5000,"price":"$0.18170","currency":"USD"},{"qty":10000,"price":"$0.17521","currency":"USD"},{"qty":25000,"price":"$0.17261","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will FOD814S drop into a panel that was specified around FODM1009 without rewiring?","answer":"The FOD814S and FODM1009 are both 1-channel transistor-output optoisolators in surface-mount packages, but they are not pin-to-pin drop-in replacements. The FODM1009 has a DC-only input, a lower isolation rating (4170Vrms vs 5000Vrms), and a higher Vce saturation (300mV vs 200mV). A board-level review of the input drive circuit and isolation requirements is necessary before substituting."},{"question":"What is FOD814S's listed input type (AC, DC) on this Optoisolators line?","answer":"The FOD814S accepts both AC and DC input. This means the internal LED is back-to-back or anti-parallel, allowing the optoisolator to sense alternating current waveforms (e.g., line voltage zero-crossing) as well as DC logic levels, without external rectification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD814S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD814S when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}