{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCDT1101","brand":"Vishay","brandSlug":"vishay","productSlug":"TCDT1101","canonicalUrl":"https://icboms.com/vishay/TCDT1101","factsUrl":"https://icboms.com/api/mcp/products/TCDT1101","rawCanonicalId":null},"summary":{"shortDescription":"Vishay TCDT1101 optoisolator, 1-channel DC input, transistor output, 5000Vrms isolation, 6-DIP through-hole package, 40-80% CTR at 10mA, -55°C to +110°C.","salesMarkdown":"The Vishay TCDT1101 is a single-channel optoisolator with a transistor output, designed to pass DC signals across a galvanic isolation barrier rated at 5000Vrms. That isolation voltage is the part's defining spec: it qualifies the device for safety-rated applications where you need to separate a low-voltage control side from a higher-voltage or noisy power domain — think industrial PLC digital inputs, motor-drive feedback, or AC-mains sensing interfaces. The 6-DIP through-hole package (0.300\" body width) is the classic industrial footprint, easy to hand-assemble or wave-solder, and the -55°C to +110°C operating range covers both cold-start environments and warm cabinet interiors. ## CTR range and drive margin The current transfer ratio is specified as 40% minimum and 80% maximum, both measured at a forward current of 10mA. That 2:1 spread is typical for a standard-transistor-output opto — you design the pull-up resistor and logic threshold to work with the worst-case 40% CTR, not the typical. At 10mA input, the output can sink at least 4mA (40% of 10mA), which is enough to drive a TTL or CMOS gate input directly. The 50mA absolute maximum output per channel gives headroom for driving a small relay or LED indicator without an external buffer. ## Switching speed and timing budget Rise and fall times are 7µs and 6.7µs typical, with turn-on and turn-off times of 11µs and 7µs. That puts the TCDT1101 squarely in the low-speed isolation class — fine for 50/60 Hz line sensing, relay coil drive, or DC state detection, but not for high-speed data or PWM above a few kilohertz. If your application needs faster switching, you would step up to a logic-output optocoupler or a digital isolator. ## Package and assembly fit The 6-DIP through-hole package (7.62mm lead spacing) is a standard industrial form factor. The tube shipping medium is typical for DIP parts — fine for hand-loading or auto-insertion with tube feeders. No moisture sensitivity concerns (MSL 1 by default for hermetic DIPs), so no bake required before reflow or wave soldering.","metaTitle":"TCDT1101 Optoisolator, 5000Vrms, 6-DIP Through Hole","metaDescription":"TCDT1101 optoisolator with 5000Vrms isolation, transistor output, 40-80% CTR at 10mA. 6-DIP through-hole package. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"300mV","Operating Temperature":"-55°C ~ 110°C","Rise / Fall Time (Typ)":"7µs, 6.7µs","Voltage - Output (Max)":"32V","Supplier Device Package":"6-DIP","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"80% @ 10mA","Current Transfer Ratio (Min)":"40% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.25V","Turn On / Turn Off Time (Typ)":"11µs, 7µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.67","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.68000","currency":"USD"},{"qty":10,"price":"$0.44900","currency":"USD"},{"qty":100,"price":"$0.29670","currency":"USD"},{"qty":1000,"price":"$0.22911","currency":"USD"},{"qty":2000,"price":"$0.20703","currency":"USD"},{"qty":5000,"price":"$0.19323","currency":"USD"},{"qty":10000,"price":"$0.18633","currency":"USD"},{"qty":25000,"price":"$0.18357","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8ff1205f471c41833ed7a3cf9f0601a3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio (CTR) of TCDT1101?","answer":"Design for the 40% worst-case to ensure reliable logic-level drive."},{"question":"Can TCDT1101 be used as a replacement for 4N35?","answer":"The TCDT1101 and 4N35 are both single-channel transistor-output optoisolators in a 6-DIP package with similar pinouts, but the 4N35 typically has a higher CTR (100% min at 10mA) and a lower isolation voltage (3550Vrms). Verify the CTR and isolation requirements of your design before substituting — the TCDT1101's 40% min CTR may not provide enough output current in a circuit tuned for the 4N35's higher gain."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/TCDT1101","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/TCDT1101 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}}