{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ILQ55","brand":"Vishay","brandSlug":"vishay","productSlug":"ILQ55","canonicalUrl":"https://icboms.com/vishay/ILQ55","factsUrl":"https://icboms.com/api/mcp/products/ILQ55","rawCanonicalId":null},"summary":{"shortDescription":"Vishay ILQ55, 4-channel Darlington output optocoupler, 5300Vrms isolation, 125mA per channel, 55V output max, through-hole 16-DIP (0.300\", 7.62mm), -55°C to 100°C, ROHS3 compliant.","salesMarkdown":"## What the 5300Vrms isolation and Darlington output mean for your BOM The ILQ55 is a 4-channel Darlington-output optocoupler in a 16-DIP through-hole package, rated for 5300Vrms isolation between input and output. That isolation voltage is the spec that decides fit: it qualifies the part for industrial motor drives, AC-line monitoring, power-supply feedback loops, and any application where galvanic separation is required for safety or noise immunity. The Darlington output gives you a current-transfer ratio of 100% minimum at 10mA forward current, so a modest LED drive can switch up to 125mA per channel at up to 55V on the output side — enough to drive a relay coil, a small solenoid, or a PLC input directly without an external transistor. ## Temperature range and switching speed — where this part works and where it doesn't Rise and fall times are 10µs and 35µs typical — fine for 10kHz switching or relay drive, but too slow for high-speed data isolation or digital communication links. If you need sub-microsecond response, look at a logic-output optocoupler instead. ## Package and mounting — through-hole matters for this class Through-hole mounting is preferred in high-vibration environments (motor drives, heavy machinery) where a surface-mount optocoupler might crack a solder joint over time. The supplier device package is 16-DIP, so the mechanical outline is consistent across the Vishay IL-series family. The ROHS3 compliance covers the current EU exemption landscape, which simplifies export compliance for finished goods.","metaTitle":"ILQ55 Optoisolator, 4-Ch Darlington 16-DIP, 5300Vrms","metaDescription":"ILQ55 4-channel Darlington optocoupler in 16-DIP, 5300Vrms isolation, 125mA/ch output, -55°C to 100°C. Active lifecycle, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Input Type":"DC","Output Type":"Darlington","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Channels":"4","Voltage - Isolation":"5300Vrms","Vce Saturation (Max)":"1V","Operating Temperature":"-55°C ~ 100°C","Rise / Fall Time (Typ)":"10µs, 35µs","Voltage - Output (Max)":"55V","Supplier Device Package":"16-DIP","Current - Output / Channel":"125mA","Current Transfer Ratio (Min)":"100% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.25V","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.86","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.86000","currency":"USD"},{"qty":10,"price":"$2.72800","currency":"USD"},{"qty":100,"price":"$2.23400","currency":"USD"},{"qty":500,"price":"$1.88334","currency":"USD"},{"qty":1000,"price":"$1.72748","currency":"USD"},{"qty":2000,"price":"$1.65605","currency":"USD"},{"qty":5000,"price":"$1.62358","currency":"USD"}]},"links":{"datasheetUrl":"https://www.vishay.com/docs/83621/ild55.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/ILQ55","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/ILQ55 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}}