{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SFH618A-5","brand":"Vishay","brandSlug":"vishay","productSlug":"SFH618A-5","canonicalUrl":"https://icboms.com/vishay/SFH618A-5","factsUrl":"https://icboms.com/api/mcp/products/SFH618A-5","rawCanonicalId":null},"summary":{"shortDescription":"Vishay SFH618A-5 optocoupler, 1-channel DC-input transistor output, 5300Vrms isolation, 250-500% CTR at 1mA, 55V output max, 4-DIP through-hole package, -55 to 100°C, ROHS3.","salesMarkdown":"## 5300Vrms isolation in a 4-DIP through-hole package The Vishay SFH618A-5 is a single-channel optocoupler with a phototransistor output, designed for galvanic isolation in industrial, power-supply, and signal-isolation applications. It provides 5300Vrms of isolation voltage in a standard 4-DIP through-hole package, making it a straightforward drop-in for boards that need to separate high-voltage and low-voltage domains without adding a separate isolated DC-DC stage. The current transfer ratio (CTR) is specified at 250% minimum and 500% maximum when the forward current is 1mA, which gives a wide margin for driving logic inputs or low-current loads. The transistor output can handle up to 55V and 50mA continuous, with a typical Vce saturation of 400mV at the rated forward current. This suits 50/60 Hz line-frequency isolation, relay drivers, PLC input modules, and general-purpose status feedback where sub-microsecond timing is not required. ## Temperature range and operating environment The 100°C ceiling is the junction limit, so derate the output current if the board runs near that boundary for extended periods. The forward voltage is typically 1.1V at the rated forward current, and the maximum DC forward current is 60mA, so a simple series resistor from a 3.3V or 5V logic rail sets the LED drive without exceeding the absolute maximum.","metaTitle":"SFH618A-5 Optoisolator, 5300Vrms, 4-DIP Through Hole","metaDescription":"SFH618A-5 Vishay optocoupler: 5300Vrms isolation, transistor output, 250-500% CTR at 1mA, 55V output max, -55 to 100°C. Active, ROHS3.","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)":"500% @ 1mA","Current Transfer Ratio (Min)":"250% @ 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-5?","answer":"The CTR is 250% minimum and 500% maximum, measured at a forward current of 1mA. This wide range means the part can drive a standard logic input or a small relay coil with plenty of headroom, but the design must tolerate the full spread across temperature and production lots."},{"question":"What is the difference between SFH618A-5 and SFH618A-3?","answer":"The SFH618A-5 and SFH618A-3 are both single-channel transistor-output optocouplers in the same 4-DIP package with the same 5300Vrms isolation rating. The difference is the CTR bin: the SFH618A-5 guarantees 250% to 500% at 1mA, while the SFH618A-3 covers a lower range (100% to 200% at 1mA). The -5 bin gives more drive current margin for loads that need it; the -3 bin is sufficient for standard logic-level interfacing and may be cheaper or more available."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/SFH618A-5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/SFH618A-5 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}}