{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IL4108-X009T","brand":"Vishay","brandSlug":"vishay","productSlug":"IL4108-X009T","canonicalUrl":"https://icboms.com/vishay/IL4108-X009T","factsUrl":"https://icboms.com/api/mcp/products/IL4108-X009T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay IL4108-X009T optoisolator, triac output, 5300Vrms isolation, 800 V off-state, 35 µs turn-on, zero-crossing, 6-SMD, -55°C to 100°C, active.","salesMarkdown":"The IL4108-X009T is a single-channel optoisolator with a triac output, built to switch AC loads from a low-voltage control side while keeping 5300 Vrms of galvanic isolation between the two domains. The 800 V off-state rating means it can block the full peak of a 277 VAC line (or a 480 VAC line with margin) when the triac is off — the first check when you're replacing a blown opto on a motor-drive or industrial relay board. The zero-crossing circuit turns on the triac only near the AC zero crossing, which cuts inrush current and EMI on resistive or lightly inductive loads; if you need phase-angle control for dimming or soft-start, you'd reach for the non-zero-crossing variant instead. ## dV/dt immunity — why 10 kV/µs matters The minimum static dV/dt of 10 kV/µs tells you the output triac won't falsely trigger when a fast voltage transient slams across its terminals — the kind of spike you get from contactor bounce, motor commutation, or a nearby lightning strike on the mains. If you've ever seen a triac latch on and stay on after a transient, you know this spec is the difference between a board that runs for years and one that fails mysteriously. The 35 µs turn-on time is fast enough for most 50/60 Hz switching but won't work for high-frequency PWM. It holds CSA and UR approvals, which simplifies acceptance into UL-listed equipment and Canadian-market builds.","metaTitle":"IL4108-X009T Optoisolator Triac Output, 5300Vrms","metaDescription":"IL4108-X009T optoisolator with triac output, 5300Vrms isolation, 800V off-state voltage, 35µs turn-on, zero-crossing, -55°C to 100°C, 6-SMD, active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Triac","Turn On Time":"35µs","Mounting Type":"Surface Mount","Package / Case":"6-SMD","Approval Agency":"CSA, UR","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"10kV/µs","Current - Hold (Ih)":"500µA","Voltage - Isolation":"5300Vrms","Voltage - Off State":"800 V","Operating Temperature":"-55°C ~ 100°C","Zero Crossing Circuit":"Yes","Voltage - Forward (Vf) (Typ)":"1.16V","Current - DC Forward (If) (Max)":"60 mA","Current - LED Trigger (Ift) (Max)":"2mA","Current - On State (It (RMS)) (Max)":"300 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.95","priceTiers":[{"qty":1,"price":"$3.95000","currency":"USD"},{"qty":10,"price":"$2.79300","currency":"USD"},{"qty":100,"price":"$2.28790","currency":"USD"},{"qty":500,"price":"$1.92874","currency":"USD"},{"qty":1000,"price":"$1.76913","currency":"USD"},{"qty":2000,"price":"$1.69597","currency":"USD"},{"qty":5000,"price":"$1.66271","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3d733fc231feb010bf94b3e877d16d18.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IL4108-X009T/alternatives.json"},"ai":{"faq":[{"question":"What is the output type of IL4108-X009T?","answer":"The output is a triac, designed for switching AC loads. It includes a zero-crossing circuit that turns on near the AC zero crossing to reduce inrush and EMI."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/IL4108-X009T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/IL4108-X009T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}