{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD852","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD852","canonicalUrl":"https://icboms.com/onsemi/FOD852","factsUrl":"https://icboms.com/api/mcp/products/FOD852","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD852, single-channel Darlington optoisolator, 4-DIP through-hole package, 5000Vrms isolation, 1000%–15000% current transfer ratio, 300V output rating, 150mA output current.","salesMarkdown":"## Isolation and output rating for industrial loads The FOD852 is a single-channel Darlington-output optoisolator rated for 5000Vrms isolation. That 5 kV isolation makes it a candidate for galvanic separation in motor drives, PLC I/O modules, and AC-line monitoring where the safety barrier must withstand transient overvoltage. The Darlington pair gives a current transfer ratio of 1000% minimum to 15000% maximum at 1 mA forward current — meaning the output can sink orders of magnitude more current than the LED drives, so a low-power logic pin on one side can switch a 150 mA load on the other. Output transistor collector-emitter breakdown is rated to 300V. That covers rectified 240VAC rails and 300VDC bus monitoring without an external clamp. The 1.2V typical Vce(sat) at rated output current keeps conduction loss low enough that the 4-DIP package can dissipate the heat without a heatsink in most ambient conditions. ## Switching speed and temperature range Rise time is 100 µs typical, fall time 20 µs typical. That is slow relative to transistor-output optos — the Darlington gain stage adds storage time. For 50/60 Hz line-frequency sensing, relay-coil drive, or DC-level detection the speed is adequate; for high-speed serial isolation or PWM above a few hundred Hz, a faster phototransistor or digital isolator would be needed. Operating temperature range is -30°C to 100°C. The upper limit covers the inside of a panel near transformers or drives. ## Package and lifecycle status The 4-DIP (0.300\", 7.62mm) through-hole package is a standard footprint shared with many 4-pin DIP optos — the supplier device package is 4-DIP. The part is ROHS3 compliant.","metaTitle":"FOD852 onsemi Optoisolator: 5000Vrms Darlington 4-DIP","metaDescription":"onsemi FOD852 optoisolator with Darlington output, 5000Vrms isolation, 1000%-15000% CTR, 300V output rating, 150mA output current. Active production.","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":"Through Hole","Package / Case":"4-DIP (0.300\\\", 7.62mm)","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-DIP","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":"$1.08","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.08000","currency":"USD"},{"qty":10,"price":"$0.70200","currency":"USD"},{"qty":100,"price":"$0.46020","currency":"USD"},{"qty":1000,"price":"$0.36330","currency":"USD"},{"qty":2000,"price":"$0.33908","currency":"USD"},{"qty":5000,"price":"$0.32697","currency":"USD"},{"qty":10000,"price":"$0.32212","currency":"USD"},{"qty":25000,"price":"$0.31486","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/afa60ded3b92d490f3192dcbf6ef2732.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy FOD852 and how do I get a price?","answer":"The FOD852 is an active, ROHS3-compliant part available through the authorized distribution network. We can source it and provide a current price and lead time against your specific order quantity. Submit an RFQ through this page with your target volume and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD852","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD852 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:11:12.428Z","lastPublished":"2026-07-17T20:11:12.428Z","indexable":true}}