{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD2741CSV","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD2741CSV","canonicalUrl":"https://icboms.com/onsemi/FOD2741CSV","factsUrl":"https://icboms.com/api/mcp/products/FOD2741CSV","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD2741CSV optoisolator, 1-channel, DC input, transistor output, 5000Vrms isolation, 100-200% CTR at 10mA, 8-SMD Gull Wing, Tube.","salesMarkdown":"## Isolation and signal transfer in a single channel The FOD2741CSV is a 1-channel optoisolator from onsemi's FOD274 family, providing 5000Vrms galvanic isolation between a DC input LED and a phototransistor output. This isolation rating meets reinforced insulation requirements per IEC 60950-1, making it suitable for safety barriers in power supplies, motor drives, and industrial control interfaces where the primary and secondary sides must be electrically separated. ## Current transfer ratio — what 100-200% at 10 mA means The CTR is specified as 100% minimum and 200% maximum at a forward current of 10 mA. A CTR of 100% means the output transistor can sink at least as much current as the LED draws — so at 10 mA LED drive, the output can deliver 10 mA into the load. The 200% ceiling means the part is not overly sensitive, avoiding saturation or excessive gain in logic-level interfaces. This range suits standard TTL or CMOS input stages without external gain stages. ## Output ratings — voltage and current limits The phototransistor output is rated for a maximum collector-emitter voltage of 30 V and a continuous output current of 50 mA per channel. The Vce saturation voltage is 400 mV maximum at the rated current, which keeps the voltage drop low enough to drive a 5 V logic input directly. These limits define the load side: use it for signals up to 24 VDC and currents below 50 mA, typical for PLC digital inputs, relay drivers, or isolated feedback loops. ## Package and temperature range Housed in an 8-SMD Gull Wing package (supplier device package 8-SMD), the FOD2741CSV is designed for surface-mount assembly on standard PCB footprints. The part ships in Tube packaging. onsemi has marked the FOD2741CSV as Obsolete. There is no official successor or second-source listed in the manufacturer's records. For existing BOM lines, availability is limited to surplus and broker inventory.","metaTitle":"onsemi FOD2741CSV Optoisolator, 5000Vrms, 8-SMD, Obsolete","metaDescription":"onsemi FOD2741CSV optoisolator, 1-channel DC input, transistor output, 5000Vrms isolation, 100-200% CTR at 10mA, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"8-SMD, Gull Wing","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"FOD274","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-40°C ~ 85°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"30V","Supplier Device Package":"8-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"200% @ 10mA","Current Transfer Ratio (Min)":"100% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.5V (Max)","Turn On / Turn Off Time (Typ)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/68430cecde9bc72afdbde32963ab63a1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the FOD2741CSV?","answer":"No pin-compatible alternative is listed by onsemi for this specific order code. The FOD274 family includes other CTR bins and package variants, but none are direct drop-in replacements. A functional replacement would require verifying the CTR, isolation, and package footprint against the BOM requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD2741CSV","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD2741CSV when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:32:11.285Z","lastPublished":"2026-07-21T06:32:11.285Z","indexable":true}}