{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VOS617A-2T","brand":"Vishay","brandSlug":"vishay","productSlug":"VOS617A-2T","canonicalUrl":"https://icboms.com/vishay/VOS617A-2T","factsUrl":"https://icboms.com/api/mcp/products/VOS617A-2T","rawCanonicalId":null},"summary":{"shortDescription":"VOS617A-2T optocoupler, 1-channel, DC input, transistor output, 3750Vrms isolation, 63%–125% CTR at 5 mA, 80V output max, 50 mA output current, 4-SOIC surface-mount package, -55°C to 110°C operating range.","salesMarkdown":"The VOS617A-2T is a 1-channel phototransistor optocoupler from Vishay in a 4-SOIC surface-mount package. It provides 3750Vrms galvanic isolation between a DC input LED and a transistor output, with a current transfer ratio (CTR) specified between 63% and 125% at a 5 mA forward current. The 80V output rating and 50 mA output current capacity suit it for logic-level interfacing, PLC digital inputs, motor-drive feedback, and isolated DC-DC converter feedback loops where the secondary side needs to talk back to the primary controller without a direct ground path. The 3750Vrms isolation rating is the key safety parameter. It qualifies the VOS617A-2T for reinforced insulation in mains-connected equipment per IEC 60950-1 and IEC 62368-1, as long as the working voltage stays within the creepage and clearance limits of the 4-SOIC package. For a 230 VAC line-powered supply, this part gives you the isolation margin to separate the primary-side controller from the secondary-side feedback without an extra isolation transformer winding. The 4-SOIC body width (4.40 mm) provides the creepage distance for basic insulation at 250 V working voltage; check your standard's requirement for reinforced insulation — some specs call for 8 mm or more, which this package alone doesn't deliver. ## CTR spread: 63% to 125% at 5 mA — the design decision The CTR min of 63% at 5 mA forward current sets the worst-case LED drive current you need to guarantee the output transistor saturates. With a 5 mA LED current, the output can sink at least 3.15 mA (63% of 5 mA). If your load resistor on the output side pulls 2 mA, you have margin. The 125% max means you don't have to over-drive the LED to cover the low end — a 5 mA forward current is enough for the full CTR range. The 3 µs rise/fall and 6 µs/4 µs turn-on/turn-off times limit this part to switching frequencies below about 50 kHz — fine for 50/60 Hz line sensing, relay drivers, and slow digital isolators, but not for high-speed comms like I²C or SPI isolation. ## Temperature range and environment The 110°C upper limit is 10°C above the typical 105°C industrial ceiling, giving a bit of headroom for self-heating in a confined enclosure. The -55°C low end covers cold-start conditions in outdoor gear. The transistor output type is standard phototransistor, not a photodiode-plus-amplifier, so the switching speed and CTR will drift with temperature — expect the CTR to increase by roughly 0.5% per °C above 25°C, which the 63% min at 25°C should still accommodate at 110°C. ## Package and footprint The 4-SOIC (also called 4-SSOP in the supplier device package field) is a 4-pin surface-mount package with a 4.40 mm body width and a 0.173\" (4.40 mm) case height. The 4-SOIC footprint is shared with many Vishay and Broadcom optocouplers, so a board laid out for this part can often take a pin-compatible alternative without a layout change. The package is ROHS3 compliant per the listing. ## Lifecycle and sourcing It is ROHS3 compliant.","metaTitle":"VOS617A-2T Optocoupler, 3750Vrms, Transistor Output, 4-SOIC","metaDescription":"VOS617A-2T optocoupler with 3750Vrms isolation, transistor output, 63%–125% CTR at 5 mA, -55°C to 110°C, active lifecycle, ROHS3 compliant.","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)":"125% @ 5mA","Current Transfer Ratio (Min)":"63% @ 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":"$0.22070","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/a7bf85b8ed5826a4e7f02abe16ba86bb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between VOS617A-2T and VOS617A?","answer":"The -2T suffix on VOS617A-2T indicates tape-and-reel packaging (production reel) versus the base VOS617A which may ship in tube or bulk. Electrically and functionally they are identical — same 3750Vrms isolation, same 63%–125% CTR range, same 4-SOIC package. The -2T is the reeled version for automated pick-and-place assembly."},{"question":"Is VOS617A-2T RoHS compliant?","answer":"Yes, the VOS617A-2T is listed as ROHS3 compliant, meaning it meets the EU RoHS directive including the exemption for lead in solder (exemption 7(c)-I). No additional documentation is needed for CE marking or RoHS declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VOS617A-2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VOS617A-2T 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}}