{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD2741C","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD2741C","canonicalUrl":"https://icboms.com/onsemi/FOD2741C","factsUrl":"https://icboms.com/api/mcp/products/FOD2741C","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD2741C Optoisolator, single-channel transistor output, 5000Vrms isolation, 100-200% CTR, 8-DIP through-hole, Tube.","salesMarkdown":"## CTR range and forward voltage — what they mean for the drive circuit The FOD2741C: Current transfer ratio (CTR) is specified at 100% minimum to 200% maximum, tested at IF=10mA — this means the output transistor can sink at least as much current as the LED drives, with a 2:1 spread that the designer must budget for across temperature and device tolerance. Forward voltage Vf is 1.5V max at the same 10mA forward current, so the input-side series resistor must drop the remaining drive voltage; the 30V output max and 50mA output current per channel suit 5V or 24V logic-level loads. onsemi lists the FOD2741C as obsolete. ## Industrial temperature range and DC input The input type is DC — the internal LED is driven by a DC forward current, not an AC signal, so the part is suited for on/off or PWM signalling from a microcontroller or logic gate.","metaTitle":"onsemi FOD2741C Optoisolator, 5000Vrms, 8-DIP, Obsolete","metaDescription":"onsemi FOD2741C single-channel transistor output optoisolator, 5000Vrms isolation, 100-200% CTR at 10mA, 8-DIP through-hole.","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":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","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-DIP","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":"$0.3600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/68430cecde9bc72afdbde32963ab63a1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) range?","answer":"CTR is 100% minimum to 200% maximum, tested at IF=10mA. This spread means the output drive capability varies by up to 2:1 across devices, which must be accounted for in the circuit design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD2741C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD2741C when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:32:09.493Z","lastPublished":"2026-07-21T06:32:09.493Z","indexable":true}}