{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCMT1102","brand":"Vishay","brandSlug":"vishay","productSlug":"TCMT1102","canonicalUrl":"https://icboms.com/vishay/TCMT1102","factsUrl":"https://icboms.com/api/mcp/products/TCMT1102","rawCanonicalId":null},"summary":{"shortDescription":"Vishay TCMT1102 optocoupler, 1-channel DC input, transistor output, 3750Vrms isolation, 63-125% CTR at 10mA, 4-SOP surface mount package, -40°C to 100°C.","salesMarkdown":"## Single-channel optocoupler for isolated signal transfer The Vishay TCMT1102 is a single-channel, DC-input, transistor-output optocoupler in a 4-SOP surface-mount package. It provides 3750Vrms galvanic isolation between input and output, making it a standard choice for breaking ground loops and translating logic levels across an isolation barrier in industrial controls, PLC I/O modules, and isolated power-supply feedback paths. The current transfer ratio is specified at 63% minimum to 125% maximum, both measured at If = 10 mA. That spread means the output transistor saturates with as little as 6.3 mA collector current for 10 mA in, or as much as 12.5 mA — the designer sizes the pull-up resistor and the input resistor to guarantee saturation across the full CTR window. A 3.3V logic input with a 330 Ω series resistor delivers about 10 mA forward current, which lands squarely in the test condition. Rise and fall times are 5.5 µs and 7 µs typical; turn-on and turn-off times are 9.5 µs and 8.5 µs typical. This part handles 10 kbaud to 100 kbaud serial links cleanly — think UART isolation or slow PLC input filtering. For faster signals like 1 MHz PWM or CAN, look at a digital-output optocoupler with sub-microsecond propagation delay. ## Output voltage and current ratings The output transistor is rated for 70 V maximum collector-emitter voltage and 50 mA continuous output current per channel. That covers 24 V industrial logic rails and 5 V / 3.3 V logic translation with margin. The 300 mV maximum saturation voltage at the test current keeps the on-state voltage drop low enough that the output can drive a standard TTL or CMOS input without an extra pull-up to a higher rail.","metaTitle":"TCMT1102 Optocoupler, 3750Vrms, 63-125% CTR, 4-SOP","metaDescription":"Vishay TCMT1102 optocoupler: 3750Vrms isolation, transistor output, 63-125% CTR at 10mA, 4-SOP surface mount. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"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)":"300mV","Operating Temperature":"-40°C ~ 100°C","Rise / Fall Time (Typ)":"5.5µs, 7µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SOP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"125% @ 10mA","Current Transfer Ratio (Min)":"63% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.35V","Turn On / Turn Off Time (Typ)":"9.5µs, 8.5µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.40800","currency":"USD"},{"qty":100,"price":"$0.27020","currency":"USD"},{"qty":1000,"price":"$0.20860","currency":"USD"},{"qty":3000,"price":"$0.18849","currency":"USD"},{"qty":6000,"price":"$0.17592","currency":"USD"},{"qty":15000,"price":"$0.16964","currency":"USD"},{"qty":30000,"price":"$0.16713","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/af0b0e26700205d711eb6f1255713a19.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is TCMT1102 compatible with 3.3V logic?","answer":"Yes. The typical forward voltage is 1.35 V at If=10 mA, so a 3.3 V logic output with a series resistor (e.g., 330 Ω) drives the input LED within the 60 mA absolute-maximum forward current. The output CTR range of 63% to 125% at 10 mA ensures the output transistor saturates into a 3.3 V pull-up rail."},{"question":"What is the TCMT1102 current transfer ratio?","answer":"The current transfer ratio (CTR) is 63% minimum and 125% maximum, both specified at If = 10 mA with Vce = 5 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/TCMT1102","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/TCMT1102 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}}