{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD2742B","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD2742B","canonicalUrl":"https://icboms.com/onsemi/FOD2742B","factsUrl":"https://icboms.com/api/mcp/products/FOD2742B","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD2742B, single-channel DC-input transistor-output optoisolator, 2500Vrms isolation, 100-200% CTR at 10 mA, 8-SOIC surface-mount package, tube.","salesMarkdown":"## 2500Vrms isolation, 8-SOIC surface mount The FOD2742B is an onsemi single-channel optoisolator with a transistor output, rated for 2500Vrms isolation. That isolation voltage suits it for basic galvanic isolation in power-supply feedback loops, motor-drive signal paths, and industrial sensor interfaces where the primary-to-secondary clearance is under 2500 Vrms. It comes in an 8-SOIC surface-mount package — the same 0.154-inch-wide body as standard SOIC-8. ## CTR bin 100-200% at 10 mA Current transfer ratio is binned from 100% minimum to 200% maximum at a forward current of 10 mA. At 1.2V typical forward voltage, the input-side power dissipation is modest. Output side handles up to 70V collector-emitter and 50 mA continuous current. The 400 mV max Vce(sat) keeps the on-state voltage drop low in logic-level switching — useful when the output drives a microcontroller GPIO or a gate driver directly. ## Active production, ROHS3 compliant For volume or reel requirements, confirm the packing option with your order — the tube quantity is typically 100 per tube, but verify against the BOM line count.","metaTitle":"FOD2742B onsemi Optoisolator – 2500Vrms, CTR 100-200%","metaDescription":"onsemi FOD2742B single-channel transistor-output optoisolator. 2500Vrms isolation, 100-200% CTR at 10 mA, 8-SOIC surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"2500Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-25°C ~ 85°C","Voltage - Output (Max)":"70V","Supplier Device Package":"8-SOIC","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"200% @ 10mA","Current Transfer Ratio (Min)":"100% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.51","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.51000","currency":"USD"},{"qty":10,"price":"$0.95800","currency":"USD"},{"qty":100,"price":"$0.70890","currency":"USD"},{"qty":500,"price":"$0.65142","currency":"USD"},{"qty":1000,"price":"$0.53647","currency":"USD"},{"qty":2000,"price":"$0.50965","currency":"USD"},{"qty":5000,"price":"$0.49815","currency":"USD"},{"qty":10000,"price":"$0.48666","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0e74726e95124fe5cf9530124b9bbb0a.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD2742B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD2742B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:11:15.291Z","lastPublished":"2026-07-17T20:11:15.291Z","indexable":true}}