{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N28SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N28SD","canonicalUrl":"https://icboms.com/onsemi/4N28SD","factsUrl":"https://icboms.com/api/mcp/products/4N28SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N28SD optoisolator, 1-channel DC input, transistor with base output, 5300Vrms isolation, 6-SMD gull wing package, tape and reel.","salesMarkdown":"The onsemi 4N28SD is a single-channel optoisolator with a phototransistor output and base pin access, housed in a 6-SMD gull wing package on tape and reel. Rated for 5300Vrms isolation, it provides galvanic separation between a DC input LED and the output transistor stage — sufficient for reinforced insulation in mains-referenced control circuits. The minimum current transfer ratio is 10% at 10 mA forward current, with typical turn-on and turn-off times of 2 µs each, placing it in the general-purpose switching class for low-speed signal isolation. Surface-mount 6-SMD gull wing footprint — the same 7.62 mm body width as the DIP-6 through-hole version, but with formed leads for reflow soldering. Check the MSL before you place it; the reel format suggests moisture-sensitive handling. Operating temperature range of -55°C to 100°C covers industrial and telecom environments, though the output transistor's 30 V maximum and 500 mV saturation limit the load side to low-voltage logic or small relay drives. Available through independent distribution channels; quantities are lot-specific and confirmed at RFQ. The base product number 4N28 covers multiple package variants — verify the gull-wing SMD option matches your board layout before committing a BOM line.","metaTitle":"onsemi 4N28SD Optoisolator, 5300Vrms, 6-SMD Gull Wing","metaDescription":"onsemi 4N28SD optoisolator, 1-channel transistor output, 5300Vrms isolation, 6-SMD gull wing package. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tape & Reel (TR)","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"4N28","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"500mV","Operating Temperature":"-55°C~100°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"30V","Supplier Device Package":"6-SMD","Current - Output / Channel":"-","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"10% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.18V","Turn On / Turn Off Time (Typ)":"2µs, 2µs","Current - DC Forward (If) (Max)":"100 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/549fd3247d695b0763fc033a8221c221.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N28SD/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N28SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N28SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:21:47.906Z","lastPublished":"2026-07-21T06:21:47.906Z","indexable":true}}