{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VOS618AT","brand":"Vishay","brandSlug":"vishay","productSlug":"VOS618AT","canonicalUrl":"https://icboms.com/vishay/VOS618AT","factsUrl":"https://icboms.com/api/mcp/products/VOS618AT","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VOS618AT optocoupler, DC input, transistor output, 3750Vrms isolation, 50% to 600% CTR at 1mA, 80V output max, surface mount 4-SOIC/4-SSOP, -55°C to 110°C.","salesMarkdown":"No last-time-buy or end-of-life notice applies to this date-code window, which simplifies procurement planning for both prototype builds and production runs. ## 3750Vrms isolation and wide CTR window Rated for 3750Vrms isolation, this single-channel transistor-output optocoupler suits galvanic isolation in power supplies, motor drives, and industrial interface circuits. The current transfer ratio spans 50% minimum to 600% maximum at a 1mA forward current — a broad window that gives the designer margin when driving logic inputs or low-power loads without needing to overdrive the LED side. Output transistor handles up to 80V and 50mA per channel, with a typical Vce saturation of 400mV. Switching times are moderate — 5µs rise, 7µs fall — making this part a fit for 10-100 kHz isolation barriers rather than high-speed digital isolator applications. ## Temperature range and package for industrial environments Operating temperature from -55°C to 110°C covers industrial, automotive cabin, and outdoor telecom enclosures where commercial-grade optos (0°C to 70°C) would drop out. The 4-SOIC body (4.40mm width) with 4-SSOP supplier package footprint is a common pinout shared across many Vishay and compatible optocouplers, simplifying board layout or last-minute substitution review.","metaTitle":"VOS618AT Optocoupler, 3750Vrms, 50-600% CTR, 4-SSOP","metaDescription":"VOS618AT optocoupler with 3750Vrms isolation, transistor output, 50% to 600% CTR at 1mA, -55°C to 110°C range. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SOIC (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"3750Vrms","Vce Saturation (Max)":"400mV","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"5µs, 7µs","Voltage - Output (Max)":"80V","Supplier Device Package":"4-SSOP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"600% @ 1mA","Current Transfer Ratio (Min)":"50% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.1V","Turn On / Turn Off Time (Typ)":"5µs, 8µs","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.38400","currency":"USD"},{"qty":100,"price":"$0.22070","currency":"USD"},{"qty":1000,"price":"$0.17271","currency":"USD"},{"qty":3000,"price":"$0.15832","currency":"USD"},{"qty":6000,"price":"$0.14393","currency":"USD"},{"qty":15000,"price":"$0.13433","currency":"USD"},{"qty":30000,"price":"$0.12953","currency":"USD"},{"qty":75000,"price":"$0.12473","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9e18ade64f7506aeda7401d719d8a650.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the CTR range of VOS618AT?","answer":"The current transfer ratio is specified from 50% minimum to 600% maximum, both measured at a forward current of 1mA. This wide range accommodates varying LED drive strengths and load requirements without selecting a tighter bin."},{"question":"Is VOS618AT compatible with PC817?","answer":"Both parts are single-channel transistor-output optocouplers in similar 4-pin SOP packages, but pinouts and CTR ranges differ. The VOS618AT uses a 4-SSOP footprint (4.40mm width) versus the PC817's DIP-4 or SOP-4 variants. Verify the PCB land pattern and CTR requirements before substituting — they are not drop-in replacements across all designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VOS618AT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VOS618AT 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}}