{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FODM352","brand":"onsemi","brandSlug":"onsemi","productSlug":"FODM352","canonicalUrl":"https://icboms.com/onsemi/FODM352","factsUrl":"https://icboms.com/api/mcp/products/FODM352","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FODM352, photodarlington optoisolator, 1-channel DC input, Darlington output, 3750Vrms isolation, 1000% CTR at 1 mA, 150 mA output, 4-SMD gull wing package, -55°C to 110°C.","salesMarkdown":"## Photodarlington optoisolator for high-gain isolation The FODM352 is a single-channel photodarlington optoisolator from onsemi. Its Darlington output stage delivers a minimum current transfer ratio of 1000% at just 1 mA LED drive, meaning the output can switch loads up to 150 mA continuous while the input side draws minimal current — ideal for 3.3V or 5V logic interfaces where drive current is tight. Reinforced isolation of 3750Vrms separates the input and output, meeting safety requirements for industrial controls, motor drives, and power supplies where galvanic isolation is mandatory. The 4-pin SMD gull wing package (4-MFP) suits automated surface-mount assembly and is compatible with standard reflow profiles. ## Parametric deep-dive: gain, drive, and timing With a CTR minimum of 1000% at If=1 mA, the FODM352 can be driven by a GPIO pin sourcing less than 2 mA while the output side switches a 150 mA load. This eliminates the need for a buffer transistor in many PLC digital input or relay-drive circuits. The output transistor saturates at 1.2 V max (Vce) at the rated output current, keeping power dissipation in the opto low even when driving a 24 V industrial load. Rise and fall times are 20 µs and 100 µs typical — adequate for DC switching and low-frequency signal isolation below 5 kHz. Operating temperature spans -55°C to 110°C, covering cold-start conditions in outdoor telecom cabinets and the elevated ambient inside a motor control panel. ## Sourcing and lifecycle status No end-of-life notification or successor has been issued.","metaTitle":"FODM352 onsemi Optoisolator – 3750Vrms Darlington Output","metaDescription":"onsemi FODM352 photodarlington optoisolator: 3750Vrms isolation, 1000% CTR at 1 mA, 150 mA output, -55°C to 110°C. Active production, 4-SMD gull wing.","metaKeywords":null},"attributes":{"series":"FODM352","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Series":"FODM352","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":"3750Vrms","Vce Saturation (Max)":"1.2V","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"20µs, 100µs","Voltage - Output (Max)":"300V","Supplier Device Package":"4-MFP","Current - Output / Channel":"150mA","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":"$1.17","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.17000","currency":"USD"},{"qty":10,"price":"$0.73900","currency":"USD"},{"qty":100,"price":"$0.54650","currency":"USD"},{"qty":500,"price":"$0.50222","currency":"USD"},{"qty":1000,"price":"$0.41360","currency":"USD"},{"qty":2000,"price":"$0.39292","currency":"USD"},{"qty":5000,"price":"$0.38405","currency":"USD"},{"qty":10000,"price":"$0.37519","currency":"USD"},{"qty":25000,"price":"$0.36928","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ba37fd9c62780210f39c4aae1ef4ab19.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to FODM352?","answer":"The FODM217A is a transistor-output optoisolator in the same 4-SMD package with 3750Vrms isolation, but its CTR is roughly 100% and output current is 50 mA — much lower gain and drive than the Darlington FODM352. For high-CTR applications, the FODM352 is the correct choice."},{"question":"Can FODM352 be used with 3.3V logic?","answer":"Yes. The 1.2 V typical forward voltage and 1000% CTR at 1 mA mean a 3.3V GPIO can drive the LED through a series resistor (e.g., 220 Ω) and still saturate the output fully."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FODM352","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FODM352 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:09:36.628Z","lastPublished":"2026-07-17T20:09:36.628Z","indexable":true}}