{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD852S","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD852S","canonicalUrl":"https://icboms.com/onsemi/FOD852S","factsUrl":"https://icboms.com/api/mcp/products/FOD852S","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD852S, single-channel Darlington output optocoupler, 5000Vrms isolation, 4-SMD Gull Wing surface-mount package, DC input, 300V output rating, 150mA output current.","salesMarkdown":"## 5 kV Darlington optocoupler for industrial isolation The FOD852S is a single-channel Darlington-output optocoupler from onsemi, rated for 5000Vrms isolation — enough for reinforced galvanic barriers in motor drives, industrial PSU feedback, and PLC digital I/O modules. Its Darlington output delivers a current transfer ratio (CTR) of 1000% minimum and up to 15000% maximum at a forward current of 1 mA, which means a low-side MCU pin can drive the LED directly and still switch a 150 mA load on the output side. ## Output voltage and switching speed for load interface The output transistor can block up to 300 V, so the FOD852S can drive relays, solenoids, or small DC loads on a 24 V or 48 V bus without a secondary driver transistor. Typical rise time is 100 µs and fall time 20 µs — adequate for 50/60 Hz line-synchronous switching or slow digital signals, but not for high-speed data or PWM above a few hundred hertz. ## Active production, ROHS3, surface-mount package Packaged in a 4-SMD Gull Wing body — the leads are surface-mount compatible with standard reflow profiles. The supplier device package is 4-SMD. Supplied in tube. ## Temperature range and storage considerations Rated for -30°C to +100°C operating ambient — suitable for industrial enclosures, outdoor telecom cabinets, and factory-floor equipment that sees moderate temperature swings. The 4-SMD Gull Wing package is moisture-sensitive; store the reels dry per the MSL label on the tube. If the tube has been opened, bake per IPC/JEDEC J-STD-033 before reflow.","metaTitle":"FOD852S onsemi Optoisolator 5kV Darlington 4-SMD Gull Wing","metaDescription":"FOD852S onsemi optoisolator: 5000Vrms isolation, Darlington output, 1000-15000% CTR, 300V output, 150mA. Active, ROHS3. Surface-mount 4-SMD Gull Wing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","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":"$1.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.16000","currency":"USD"},{"qty":10,"price":"$0.73600","currency":"USD"},{"qty":100,"price":"$0.54450","currency":"USD"},{"qty":500,"price":"$0.50034","currency":"USD"},{"qty":1000,"price":"$0.41204","currency":"USD"},{"qty":2000,"price":"$0.39144","currency":"USD"},{"qty":5000,"price":"$0.38261","currency":"USD"},{"qty":10000,"price":"$0.37378","currency":"USD"},{"qty":25000,"price":"$0.36789","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/afa60ded3b92d490f3192dcbf6ef2732.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is FOD852S a direct replacement for FOD852?","answer":"The FOD852S shares the same 4-SMD Gull Wing package and Darlington output as the FOD852, but the 'S' suffix typically indicates a surface-mount variant. Check the CTR and isolation ratings on your existing BOM line — the FOD852S offers 5000Vrms isolation and a 1000%–15000% CTR range. If your design used the through-hole FOD852, the footprint differs; the SMD version needs a Gull Wing land pattern."},{"question":"What is the current transfer ratio (CTR) of FOD852S?","answer":"Minimum CTR is 1000% at If=1 mA; maximum CTR is 15000% at If=1 mA. The Darlington gain is high enough that a 1 mA LED current can saturate the output transistor for a 150 mA load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD852S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD852S when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:09:00.702Z","lastPublished":"2026-07-17T20:09:00.702Z","indexable":true}}