{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817D300W","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817D300W","canonicalUrl":"https://icboms.com/onsemi/FOD817D300W","factsUrl":"https://icboms.com/api/mcp/products/FOD817D300W","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817D300W, single-channel optoisolator, DC input, transistor output, 5000Vrms isolation, 4-DIP through-hole package, 300%–600% CTR at 5mA, -55°C to 110°C operating range.","salesMarkdown":"## 5000Vrms isolation for safety-critical isolation The FOD817D300W is a single-channel optoisolator from onsemi in a 4-DIP through-hole package. It provides 5000Vrms galvanic isolation between a DC input LED and a phototransistor output, rated for continuous operation from -55°C to 110°C. The 300%–600% current transfer ratio at 5mA forward current gives ample margin to drive a microcontroller GPIO or logic gate input across temperature and LED degradation — a common failure point in marginal designs. ## CTR range and switching speed for BOM margin With a minimum CTR of 300% at 5mA, this part can sink the full 50mA output channel current with only 1.2V forward drop — the 200mV Vce saturation keeps the output transistor in hard saturation, minimising power dissipation in the load resistor. ROHS3 compliance is confirmed. ## Package and mounting for through-hole assembly The 4-DIP package with 0.400-inch (10.16mm) lead spacing is a standard through-hole footprint, compatible with wave-solder or hand-solder assembly. The 70V output rating and 50mA continuous output current suit low-side switching of relays, solenoids, or DC loads up to 3.5W.","metaTitle":"FOD817D300W Optoisolator 5000Vrms Transistor Output 4-DIP","metaDescription":"onsemi FOD817D300W optoisolator: 5000Vrms isolation, 300%-600% CTR at 5mA, DC input, transistor output, 4-DIP through hole, -55°C to 110°C, Active.","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":"Through Hole","Package / Case":"4-DIP (0.400\\\", 10.16mm)","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-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"600% @ 5mA","Current Transfer Ratio (Min)":"300% @ 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":"$0.5200","priceTiers":[{"qty":1,"price":"$0.52000","currency":"USD"},{"qty":10,"price":"$0.31800","currency":"USD"},{"qty":100,"price":"$0.18280","currency":"USD"},{"qty":1000,"price":"$0.14308","currency":"USD"},{"qty":2000,"price":"$0.13116","currency":"USD"},{"qty":5000,"price":"$0.11923","currency":"USD"},{"qty":10000,"price":"$0.11128","currency":"USD"},{"qty":25000,"price":"$0.10731","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FOD817D300W/alternatives.json"},"ai":{"faq":[{"question":"Can I replace FOD817A with FOD817D300W?","answer":"Yes, FOD817A and FOD817D300W share the same pinout, package (4-DIP), isolation voltage (5000Vrms), and output ratings (70V, 50mA). The difference is the CTR bin: FOD817A is a lower-CTR grade (80–160% at 5mA), while FOD817D300W is a higher-CTR grade (300–600% at 5mA). If your circuit needs the higher CTR margin, the D300W is a drop-in replacement. Confirm the CTR requirement in your design before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817D300W","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817D300W 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}}