{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N25SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N25SD","canonicalUrl":"https://icboms.com/onsemi/4N25SD","factsUrl":"https://icboms.com/api/mcp/products/4N25SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N25SD optoisolator, single-channel DC input, transistor with base output, 5300Vrms isolation, 6-SMD gull-wing package, Tape & Reel.","salesMarkdown":"The 4N25SD: No stock-holding claim is made here. ## 5300Vrms isolation — what it means for the BOM The 5300Vrms isolation rating is the one-minute withstand voltage between input LED and output phototransistor. This is a reinforced-insulation figure per IEC 60950-1 and UL 1577 — it separates the low-voltage control side from a 250VAC mains circuit with margin for transient overvoltages. The 20% minimum current transfer ratio at 10mA forward current means the output transistor saturates with 2mA collector current when driven at 10mA input — adequate for driving a logic gate input or a small relay coil. The 2µs typical turn-on and turn-off time limits switching to below 250kHz, fine for 50/60Hz line sensing or slow digital isolation. ## SMD gull-wing — board integration Surface-mount 6-SMD gull-wing package, 0.100-inch (2.54mm) pin pitch. The gull-wing leads provide a visible solder joint for inspection and some compliance for thermal cycling between the PCB and the epoxy body. The 6-SMD supplier device package is the same footprint as the standard DIP-6 but with formed leads for reflow soldering. Operating temperature range -55°C to 100°C covers industrial and some automotive under-hood environments — the 100°C ceiling is the junction temperature limit, not the ambient; derate the forward current above 70°C per the LED derating curve.","metaTitle":"onsemi 4N25SD Optoisolator, 5300Vrms, Transistor Output, SMD","metaDescription":"onsemi 4N25SD optoisolator, 5300Vrms isolation, transistor output, SMD gull-wing package.","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":"4N25","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)":"20% @ 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":"$0.4700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/549fd3247d695b0763fc033a8221c221.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N25SD/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 4N25SD and how do I get a price?","answer":"The 4N25SD is obsolete and no longer manufactured by onsemi. No stock count or lead-time figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N25SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N25SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T06:19:45.997Z","lastPublished":"2026-07-21T06:19:45.997Z","indexable":true}}