{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH618A-3","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH618A-3","canonicalUrl":"https://icboms.com/vishay/SFH618A-3","factsUrl":"https://icboms.com/api/mcp/products/SFH618A-3","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH618A-3 optoisolator, 1-channel DC-input transistor output, 5300Vrms isolation, 100-200% CTR at 1mA, 55V output max, -55°C to 100°C, 4-DIP through-hole package, Tube.","salesMarkdown":"The SFH618A-3 is a Vishay single-channel phototransistor optocoupler in a 4-DIP through-hole package. Its defining parametric is the current transfer ratio (CTR) bin: guaranteed minimum 100% and maximum 200% at a forward current of 1 mA. This 2:1 spread gives the designer a predictable drive range for the output transistor, which directly sets the load resistor value and the logic-level threshold on the receiving side. A CTR floor of 100% at only 1 mA input means the LED drive current can be kept low, saving power in isolated digital interfaces or PLC input modules. ## Isolation voltage and temperature range Rated for 5300 Vrms isolation, this part suits reinforced-insulation applications in industrial power supplies, motor drives, and medical equipment where galvanic isolation between control and high-voltage domains is mandatory. The 55 V output breakdown and 50 mA per-channel output current handle typical logic-level translation and low-power relay drive without extra buffering. ## Switching speed and timing budget It is a good fit for DC signal detection, status feedback, and low-frequency data transmission up to a few tens of kilohertz. For faster interfaces like SPI or CAN isolation, a digital isolator with CMOS output stages would be the correct choice. ## Lifecycle and compliance The through-hole 4-DIP package is straightforward to hand-solder or wave-solder, and the Tube shipping quantity suits both prototyping and medium-volume production runs.","metaTitle":"SFH618A-3 Optoisolator, 5300Vrms, 100-200% CTR, 4-DIP","metaDescription":"SFH618A-3 Vishay optocoupler: 5300Vrms isolation, 100-200% CTR at 1mA, 55V output, -55°C to 100°C. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Through Hole","Package / Case":"4-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-55°C ~ 100°C","Rise / Fall Time (Typ)":"3.5µs, 5µs","Voltage - Output (Max)":"55V","Supplier Device Package":"4-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"200% @ 1mA","Current Transfer Ratio (Min)":"100% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.1V","Turn On / Turn Off Time (Typ)":"6µs, 5.5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.10000","currency":"USD"},{"qty":10,"price":"$0.71800","currency":"USD"},{"qty":100,"price":"$0.47020","currency":"USD"},{"qty":1000,"price":"$0.37118","currency":"USD"},{"qty":2000,"price":"$0.34643","currency":"USD"},{"qty":5000,"price":"$0.33406","currency":"USD"},{"qty":10000,"price":"$0.32911","currency":"USD"},{"qty":25000,"price":"$0.32168","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4bb15ce016d1cbb8f2e268ef9c695016.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio of SFH618A-3?","answer":"The SFH618A-3 has a current transfer ratio (CTR) of 100% minimum and 200% maximum, measured at a forward current of 1 mA. This bin ensures the output transistor can saturate with a modest LED drive, making it suitable for low-power isolated interfaces."},{"question":"Is SFH618A-3 RoHS compliant?","answer":"Yes, the SFH618A-3 is ROHS3 compliant, meeting the latest EU directive for lead-free and restricted-substance materials."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH618A-3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH618A-3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}