{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ILQ74-X009","brand":"Vishay","brandSlug":"vishay","productSlug":"ILQ74-X009","canonicalUrl":"https://icboms.com/vishay/ILQ74-X009","factsUrl":"https://icboms.com/api/mcp/products/ILQ74-X009","rawCanonicalId":null},"summary":{"shortDescription":"Vishay ILQ74-X009, 4-channel optocoupler, transistor output, 5300Vrms isolation, 12.5% min CTR at 16mA, 3µs typ switching, -55 to 100°C, 16-SMD gull wing, ROHS3.","salesMarkdown":"The ILQ74-X009 is a 4-channel phototransistor optocoupler from Vishay, packing four isolated transistor-output channels into a single 16-SMD gull-wing package. The headline number is the 5300 Vrms isolation rating — that is the voltage the part can withstand between input and output sides, making it a solid choice for industrial PLCs, motor-drive feedback, and any board where you need to cross a safety barrier without a separate isolator per channel. Each channel gives you a phototransistor on the output side, driven by an infrared LED on the input side, with a minimum current transfer ratio of 12.5% at 16 mA forward current. That CTR floor means you need to budget at least 16 mA LED drive to guarantee the output transistor saturates; it is not a low-power part, but it is predictable. ## Switching speed and what it limits Typical turn-on and turn-off times are both 3 µs. That puts the ILQ74-X009 in the slow-to-moderate speed class — fine for reading a 24 V PLC input, detecting a relay closure, or isolating a slow serial signal up to maybe 100 kbps. It will not work for CAN, RS-485 at high baud, or any high-speed data isolation. The output transistor is rated for 20 V maximum on the collector, so keep your pull-up rail at 20 V or less. ## Temperature range and field reality The 100°C ceiling is the junction temperature limit — if your board sits near a hot power supply or motor drive, derate the LED current above 85°C or you will lose CTR margin. Storage temperature is wider, but operating is the number that matters for the BOM. Comes in a 16-SMD gull-wing package (16-SMD case style). Surface-mount only — no through-hole version in this order code. The gull-wing leads are visible and inspectable after reflow, which is a plus for field repair; you can touch up a joint with a fine iron if needed.","metaTitle":"ILQ74-X009 Optocoupler, 4-Ch, 5300Vrms, Transistor Output","metaDescription":"ILQ74-X009 4-channel optocoupler with 5300Vrms isolation, transistor output, 12.5% min CTR at 16mA, -55 to 100°C. 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":"Surface Mount","Package / Case":"16-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"4","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"500mV","Operating Temperature":"-55°C ~ 100°C","Voltage - Output (Max)":"20V","Supplier Device Package":"16-SMD","Current Transfer Ratio (Min)":"12.5% @ 16mA","Voltage - Forward (Vf) (Typ)":"1.3V","Turn On / Turn Off Time (Typ)":"3µs, 3µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.89","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.96000","currency":"USD"},{"qty":10,"price":"$2.80300","currency":"USD"},{"qty":100,"price":"$2.29600","currency":"USD"},{"qty":500,"price":"$1.93558","currency":"USD"},{"qty":1000,"price":"$1.77539","currency":"USD"},{"qty":2000,"price":"$1.70197","currency":"USD"},{"qty":5000,"price":"$1.66860","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between ILQ74-X009 and ILQ74?","answer":"The ILQ74-X009 is the surface-mount gull-wing variant of the ILQ74 family. The base ILQ74 is typically a through-hole DIP package; the -X009 suffix designates the 16-SMD gull-wing package. Electrical specs — 5300 Vrms isolation, 4 channels, transistor output, 12.5% min CTR — are the same between the two. If your board is designed for a DIP footprint, the X009 will not fit without a layout change."},{"question":"Is ILQ74-X009 RoHS compliant?","answer":"Yes, it is ROHS3 compliant — no restricted substances above the threshold limits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/ILQ74-X009","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/ILQ74-X009 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}}