{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCLD1000","brand":"Vishay","brandSlug":"vishay","productSlug":"TCLD1000","canonicalUrl":"https://icboms.com/vishay/TCLD1000","factsUrl":"https://icboms.com/api/mcp/products/TCLD1000","rawCanonicalId":null},"summary":{"shortDescription":"TCLD1000 Darlington optoisolator, 5000Vrms isolation, 600% min CTR at 1mA, 35V output max, 80mA/ch, -55°C to 100°C, 4-SMD gull wing, surface mount.","salesMarkdown":"## What the 5000Vrms isolation and Darlington output mean for your BOM The TCLD1000 is a single-channel Darlington optoisolator in a 4-SMD gull-wing package (4-SOP), rated for 5000Vrms isolation between input and output. That isolation voltage qualifies it for reinforced insulation in industrial motor drives, medical power supplies, and any design where a galvanic barrier must survive a 5kV transient without breakdown. The Darlington output stage gives a minimum current transfer ratio of 600% at just 1 mA forward current, so the LED drive current can be kept low while still switching a 35 V, 80 mA load on the output side. This makes it a good fit for PLC input modules, relay drivers, and isolated sensor interfaces where the microcontroller's GPIO has limited drive strength. ## Temperature range and switching speed Operating from -55°C to 100°C, the TCLD1000 covers the full military temperature range, so it can be used in avionics, satellite, and downhole instrumentation without derating. The trade-off is switching speed: typical rise time is 300 µs and typical turn-off time is 250 µs, which limits it to low-frequency or DC-level shifting applications. For higher-speed isolation (e.g., 10 Mbps digital isolators), this is not the right part; but for 50/60 Hz line sensing, relay coil driving, or status feedback, the 300 µs edge is plenty fast. ## Package and mounting The 4-SMD gull-wing package (supplier device package 4-SOP) is a standard surface-mount footprint for optocouplers. The 1.1 V typical forward voltage and 60 mA max forward current are typical for an IR LED; the 1 V Vce saturation at 80 mA means the Darlington drops about a volt when on, which is fine for driving a 5 V or 3.3 V logic input or a small relay coil.","metaTitle":"TCLD1000 Darlington Optoisolator, 5000Vrms, 4-SOP","metaDescription":"TCLD1000 darlington optoisolator: 5000Vrms isolation, 600% min CTR at 1mA, -55°C to 100°C, 4-SMD gull wing. 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":"Darlington","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"1V","Operating Temperature":"-55°C ~ 100°C","Rise / Fall Time (Typ)":"300µs, -","Voltage - Output (Max)":"35V","Supplier Device Package":"4-SOP","Current - Output / Channel":"80mA","Current Transfer Ratio (Min)":"600% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.1V","Turn On / Turn Off Time (Typ)":"-, 250µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.72","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.73000","currency":"USD"},{"qty":10,"price":"$0.47800","currency":"USD"},{"qty":100,"price":"$0.31310","currency":"USD"},{"qty":1000,"price":"$0.24720","currency":"USD"},{"qty":3000,"price":"$0.23072","currency":"USD"},{"qty":6000,"price":"$0.22248","currency":"USD"},{"qty":15000,"price":"$0.21918","currency":"USD"},{"qty":30000,"price":"$0.21424","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/dd3146b47dbc799a4ff019ebddfa50ab.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the current transfer ratio of TCLD1000?","answer":"The minimum current transfer ratio is 600% at 1 mA forward current. With a Darlington output, the CTR is high enough that the LED can be driven from a logic output with a series resistor, without needing a separate transistor buffer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/TCLD1000","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/TCLD1000 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}}