{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD852SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD852SD","canonicalUrl":"https://icboms.com/onsemi/FOD852SD","factsUrl":"https://icboms.com/api/mcp/products/FOD852SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD852SD, 1-channel DC-input Darlington optoisolator, 5000Vrms isolation, 4-SMD gull-wing surface-mount package, 150mA output current, 1000%–15000% current transfer ratio.","salesMarkdown":"## Darlington optoisolator for high-gain switching The FOD852SD is a single-channel DC-input Darlington optoisolator from onsemi that delivers 5000Vrms isolation in a compact 4-SMD gull-wing package. Its Darlington output stage gives a current transfer ratio ranging from 1000% to 15000% at 1mA forward current — meaning a 1mA LED drive can switch up to 150mA on the output side. This part is typically specified where a microcontroller or logic-level signal needs to drive a higher-current load — relays, contactors, solenoids, or small motors — while maintaining galvanic isolation between the control and power domains. ## Output ratings and switching speed The output can handle up to 300V collector-emitter voltage and 150mA continuous current, with a Vce saturation of 1.2V max. Rise time is 100µs typical, fall time 20µs — fast enough for 50/60 Hz AC switching or DC load control, but not intended for high-frequency PWM. Compared to transistor-output siblings like the FOD814A3SD (200mV Vce sat, 4µs rise/fall), the Darlington trades switching speed for much higher gain. If your load needs less than 50mA and you want faster edges, a transistor-output part may be a better fit. ## Package and temperature range Housed in a 4-SMD gull-wing package (supplier device package 4-SMD), it's a surface-mount part suited for reflow assembly. The operating temperature range is -30°C to 100°C, which covers most industrial and commercial environments but not extended automotive or military grades. The part is ROHS3 compliant.","metaTitle":"FOD852SD Optoisolator – onsemi Darlington 5000Vrms 4-SMD","metaDescription":"onsemi FOD852SD optoisolator: Darlington output, 5000Vrms isolation, 150mA output, 1000%-15000% CTR. Active lifecycle, surface-mount 4-SMD gull wing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"DC","Output Type":"Darlington","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"1.2V","Operating Temperature":"-30°C ~ 100°C","Rise / Fall Time (Typ)":"100µs, 20µs","Voltage - Output (Max)":"300V","Supplier Device Package":"4-SMD","Current - Output / Channel":"150mA","Current Transfer Ratio (Max)":"15000% @ 1mA","Current Transfer Ratio (Min)":"1000% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.14","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.14000","currency":"USD"},{"qty":10,"price":"$0.72400","currency":"USD"},{"qty":100,"price":"$0.53590","currency":"USD"},{"qty":500,"price":"$0.49244","currency":"USD"},{"qty":1000,"price":"$0.40554","currency":"USD"},{"qty":2000,"price":"$0.38526","currency":"USD"},{"qty":5000,"price":"$0.37657","currency":"USD"},{"qty":10000,"price":"$0.36788","currency":"USD"},{"qty":25000,"price":"$0.36208","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/afa60ded3b92d490f3192dcbf6ef2732.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy FOD852SD and check current pricing?","answer":"FOD852SD is an active onsemi part. Submit an RFQ through this page; we source against your BOM quantity and confirm availability and pricing at quote time. No stock-holding claim — we quote to order."},{"question":"Can FOD852SD be used with AC input?","answer":"No — the input type is DC only. For AC input, consider the FOD814A3SD which accepts both AC and DC input."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD852SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD852SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:01.013Z","lastPublished":"2026-07-17T20:07:01.013Z","indexable":true}}