{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FODM2705R2","brand":"onsemi","brandSlug":"onsemi","productSlug":"FODM2705R2","canonicalUrl":"https://icboms.com/onsemi/FODM2705R2","factsUrl":"https://icboms.com/api/mcp/products/FODM2705R2","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FODM2705R2 transistor-output optocoupler, 1-channel, 3750Vrms isolation, AC/DC input, 50-300% CTR, 80mA output, 4-SMD Gull Wing, Tape & Reel.","salesMarkdown":"## 3750Vrms isolation with AC/DC input flexibility The onsemi FODM2705R2 is a 1-channel transistor-output optocoupler rated for 3750Vrms isolation — sufficient for reinforced insulation in mains-connected circuits under IEC 60950-1 and IEC 62368-1. The AC/DC input stage means a single BOM line covers both line-frequency AC control signals and DC logic-level drives, reducing inventory complexity. ## CTR margin from 50% to 300% at 5mA forward current Current transfer ratio spans 50% minimum to 300% maximum at If=5mA — a 6:1 spread that gives the designer headroom for LED degradation over temperature and lifetime. At the minimum CTR, 5mA input yields at least 2.5mA at the phototransistor collector, enough to saturate a downstream logic gate or drive a 5V relay coil through the 80mA rated output. Rise and fall times are both 3µs typical, supporting switching frequencies into the low hundreds of kilohertz — adequate for isolated serial interfaces, IGBT gate drive feedback, and AC mains zero-cross detection circuits. ## Industrial temperature range and output drive Operating from -40°C to 110°C, the part covers industrial enclosures, outdoor telecom cabinets, and under-hood automotive environments without derating. The 80mA output per channel with a 40V collector-emitter maximum can sink small relays, solenoids, or PLC input modules directly — eliminating a buffer transistor in many designs.","metaTitle":"onsemi FODM2705R2 Optoisolator, 3750Vrms, AC/DC Input, 4-SMD","metaDescription":"onsemi FODM2705R2 transistor-output optocoupler with 3750Vrms isolation, AC/DC input, 50-300% CTR at 5mA. Active production, ROHS3. Quoted to order.","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":"3750Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-40°C ~ 110°C","Rise / Fall Time (Typ)":"3µs, 3µs","Voltage - Output (Max)":"40V","Supplier Device Package":"4-SMD","Current - Output / Channel":"80mA","Current Transfer Ratio (Max)":"300% @ 5mA","Current Transfer Ratio (Min)":"50% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.4V (Max)","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.76","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.76000","currency":"USD"},{"qty":10,"price":"$0.49400","currency":"USD"},{"qty":100,"price":"$0.32370","currency":"USD"},{"qty":1000,"price":"$0.25558","currency":"USD"},{"qty":2500,"price":"$0.23854","currency":"USD"},{"qty":5000,"price":"$0.23002","currency":"USD"},{"qty":12500,"price":"$0.22661","currency":"USD"},{"qty":25000,"price":"$0.22150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/269c736c440b53ce097423b4caa3ac66.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between FODM2705R2 and FODM1009?","answer":"The FODM1009 is a DC-input-only optocoupler with 5000Vrms isolation, compared to the FODM2705R2's AC/DC input at 3750Vrms. The FODM2705R2 also offers higher output current (80mA vs 50mA) and faster switching (3µs vs 5.7µs rise/fall). If your application requires AC input detection or higher drive current, the FODM2705R2 is the better fit; if higher isolation is critical and only DC control is used, FODM1009 is an option."},{"question":"What compliance documentation does onsemi provide for FODM2705R2?","answer":"The part is ROHS3 compliant per onsemi's listing. Standard documentation includes the datasheet with isolation ratings, CTR curves, and package dimensions. For specific UL, IEC, or REACH declarations, onsemi's compliance portal provides certificates per date code and lot number."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FODM2705R2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FODM2705R2 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}}