{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VOS617A-9T","brand":"Vishay","brandSlug":"vishay","productSlug":"VOS617A-9T","canonicalUrl":"https://icboms.com/vishay/VOS617A-9T","factsUrl":"https://icboms.com/api/mcp/products/VOS617A-9T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VOS617A-9T single-channel transistor-output optocoupler, 3750Vrms isolation, 200-400% CTR at 5mA, 80V output, 50mA output current, 4-SSOP package, -55 to 110°C, ROHS3.","salesMarkdown":"## 3750Vrms isolation in a 4-SSOP package The Vishay VOS617A-9T is a single-channel DC-input transistor-output optocoupler rated for 3750Vrms isolation in a 4-SSOP surface-mount package. The current transfer ratio spans 200% to 400% at 5mA forward current, giving you a wide operating margin for driving logic inputs, PLC digital I/O, relay coils, or isolated feedback loops in power supplies. The output transistor handles up to 80V and 50mA continuous, with a typical Vce(sat) of 400mV — low enough to keep dissipation under control in a 4-pin SOIC footprint. ## Switching speed and drive margin Rise and fall times are both 3µs typical; turn-on time is 6µs, turn-off 4µs. That limits the practical data rate to roughly 100 kHz — fine for 50/60 Hz mains zero-crossing detection, slow PWM for heater control, or serial interfaces like 9600 baud RS-232 isolation. For faster switching (e.g., 1 MHz gate drive) you would need a logic-output optocoupler with a different CTR/speed trade-off. The 200% minimum CTR at 5mA means the LED drive current can be as low as 2.5 mA and still guarantee the output saturates into a 5V logic load with a 10k pull-up. At the 400% max end, the same 5mA input can drive a 1k load or a relay coil directly, though you should check the 50mA output current ceiling against your load. ## Temperature range and environment The 4-SSOP package is a compact footprint for dense PCB layouts, but the 110°C upper limit means you should derate the output current if the ambient near the part exceeds 85°C — the 50mA absolute maximum assumes the package can dissipate the heat.","metaTitle":"VOS617A-9T Optocoupler, 3750Vrms, 4-SSOP, Vishay","metaDescription":"Vishay VOS617A-9T single-channel transistor-output optocoupler with 3750Vrms isolation, 200-400% CTR at 5mA, -55 to 110°C. 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)":"3µs, 3µs","Voltage - Output (Max)":"80V","Supplier Device Package":"4-SSOP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"400% @ 5mA","Current Transfer Ratio (Min)":"200% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.18V","Turn On / Turn Off Time (Typ)":"6µs, 4µs","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":"$0.22090","currency":"USD"},{"qty":1000,"price":"$0.17287","currency":"USD"},{"qty":3000,"price":"$0.15847","currency":"USD"},{"qty":6000,"price":"$0.14406","currency":"USD"},{"qty":15000,"price":"$0.13446","currency":"USD"},{"qty":30000,"price":"$0.12966","currency":"USD"},{"qty":75000,"price":"$0.12485","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a7bf85b8ed5826a4e7f02abe16ba86bb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between VOS617A-9T and EL817?","answer":"Both are single-channel transistor-output optocouplers. The VOS617A-9T is rated for 3750Vrms isolation in a 4-SSOP package, while the EL817 typically offers 5000Vrms in a DIP-4 or SOP-4 package. The VOS617A-9T's CTR range of 200% to 400% at 5mA is similar to the EL817's standard bin, but the EL817 has a wider operating temperature range (-55°C to 110°C matches the VOS617A-9T). The key difference for a BOM decision is the package: 4-SSOP vs DIP-4 — they are not pin-compatible."},{"question":"Is the VOS617A-9T compatible with 3.3V logic?","answer":"Yes, with the right bias. The forward voltage (Vf) is 1.18V typical, so a 3.3V logic output can drive the LED through a current-limiting resistor. The 200% minimum CTR at 5mA means the output transistor can saturate into a 3.3V rail with a pull-up resistor sized to keep the collector current under 50mA. For a 3.3V logic input, use a 2.2k to 4.7k pull-up to Vcc."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VOS617A-9T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VOS617A-9T 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}}