{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VOS618A-2X001T","brand":"Vishay","brandSlug":"vishay","productSlug":"VOS618A-2X001T","canonicalUrl":"https://icboms.com/vishay/VOS618A-2X001T","factsUrl":"https://icboms.com/api/mcp/products/VOS618A-2X001T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VOS618A-2X001T single-channel phototransistor optocoupler, 3750Vrms isolation, 63%–125% CTR at 1 mA, 80 V output, 50 mA output current, surface-mount 4-SSOP package, -55°C to 110°C.","salesMarkdown":"## Single-channel phototransistor optocoupler for isolated signal transfer The Vishay VOS618A-2X001T is a single-channel DC-input phototransistor optocoupler in a 4-SSOP surface-mount package, rated for 3750Vrms isolation between input and output. It is designed for basic signal isolation in industrial controls, power-supply feedback loops, and digital-logic interfaces where galvanic separation is needed without high-speed switching. Key parametrics include a current transfer ratio (CTR) range of 63% to 125% at a forward current of 1 mA, a maximum output voltage of 80 V, and a continuous output current of 50 mA per channel. The forward voltage is typically 1.1 V, and the maximum DC forward current is 50 mA. Switching times are moderate — typical rise/fall times of 5 µs and 7 µs, and turn-on/turn-off times of 5 µs and 8 µs — so it fits low-speed isolation (DC level sensing, status feedback, relay drivers) rather than high-frequency data links. ## 3750Vrms isolation — what it buys you in the BOM The 3750Vrms isolation rating is a standard reinforced single-channel level for mains-isolated circuits in appliance, industrial, and medical equipment that require basic operator protection or functional isolation. It is not a medical-grade (5 kV+) or reinforced-for-mains (5 kV–6 kV) rating, but it covers 240 VAC secondary-side isolation with margin. For designs that only need functional isolation between logic domains, this rating is sufficient and keeps the package small. ## CTR range at 1 mA — design margin for LED aging The specified CTR of 63% to 125% at 1 mA forward current is the key parameter for ensuring the output transistor saturates reliably over temperature and LED degradation. A minimum 63% means the designer can size the input resistor to guarantee a logic-level output even when the LED has aged and its light output has dropped. The 125% maximum sets the upper bound for the pull-up resistor value to avoid excessive output saturation voltage. This CTR band is tighter than many general-purpose optocouplers, which helps reduce variation across production lots. ## Package and footprint — 4-SSOP on 4-SOIC land pattern The VOS618A-2X001T is supplied in a 4-SSOP package that is footprint-compatible with the standard 4-SOIC (0.173\" body width, 4.40 mm) land pattern. This is a common footprint shared by many single-channel optocouplers, so board layout is straightforward and second-sourcing is possible without a PCB change.","metaTitle":"VOS618A-2X001T Optocoupler, 3750Vrms, Transistor Output","metaDescription":"VOS618A-2X001T single-channel optocoupler with 3750Vrms isolation, transistor output, 63%–125% CTR at 1mA. -55°C to 110°C. ROHS3. Active lifecycle.","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)":"125% @ 1mA","Current Transfer Ratio (Min)":"63% @ 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":"$0.66000","currency":"USD"},{"qty":10,"price":"$0.43500","currency":"USD"},{"qty":100,"price":"$0.28790","currency":"USD"},{"qty":1000,"price":"$0.22227","currency":"USD"},{"qty":3000,"price":"$0.20085","currency":"USD"},{"qty":6000,"price":"$0.18746","currency":"USD"},{"qty":15000,"price":"$0.18077","currency":"USD"},{"qty":30000,"price":"$0.17809","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9e18ade64f7506aeda7401d719d8a650.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can VOS618A-2X001T be used as a replacement for VOS618A-2X001?","answer":"The VOS618A-2X001T is the Tape & Reel variant of the base VOS618A-2X001. The suffix 'T' typically indicates reel packaging. Electrical specifications (CTR, isolation, output ratings) are identical. The Cut Tape (CT) option is also listed under this same order code, so the base part number VOS618A-2X001 is functionally the same device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VOS618A-2X001T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VOS618A-2X001T 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}}