{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VOT8121AD","brand":"Vishay","brandSlug":"vishay","productSlug":"VOT8121AD","canonicalUrl":"https://icboms.com/vishay/VOT8121AD","factsUrl":"https://icboms.com/api/mcp/products/VOT8121AD","rawCanonicalId":null},"summary":{"shortDescription":"Vishay VOT8121AD phototriac optocoupler, 1-channel, 5300Vrms isolation, 800V off-state voltage, 100 mA RMS on-state, non-zero-crossing, 4-DIP through-hole package, -55°C to 110°C.","salesMarkdown":"## Phototriac optocoupler for AC load switching The VOT8121AD is a 1-channel phototriac optocoupler from Vishay in a 4-DIP through-hole package. It switches AC loads up to 100 mA RMS at off-state voltages to 800 V, with 5300Vrms isolation between input and output. Typical applications include solid-state relays, AC motor starters, solenoid/valve drivers, and industrial PLC output modules where isolated triac drive is needed. ## Key ratings for BOM fit 5300Vrms isolation is the standout safety rating — sufficient for reinforced insulation in mains-connected equipment per UL/VDE. The 800 V off-state voltage lets it handle 240 VAC lines with margin for surges. Non-zero-crossing output (no zero-crossing circuit) means the triac fires immediately when LED current exceeds the 10 mA max trigger threshold, making it suitable for phase-control dimming or random-turn-on SSR designs. The 400 µA typical holding current ensures the triac latches once triggered; if the load current drops below that, the triac will commutate off at the next zero-cross. ## Package and approvals Housed in a standard 4-DIP (0.300\", 7.62mm pitch) through-hole package — easy to hand-assemble or wave-solder. Approved by CQC, cUL, UL, and VDE, which simplifies certification for export designs. Operating temperature range -55°C to 110°C covers industrial and some automotive under-hood environments. ## Sourcing and lifecycle No last-time-buy or obsolescence risk for current production.","metaTitle":"VOT8121AD Optocoupler Phototriac, 5300Vrms, 800V Off-State","metaDescription":"VOT8121AD phototriac optocoupler: 5300Vrms isolation, 800V off-state, 1.2V forward voltage. Non-zero-crossing, 4-DIP through-hole. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tube","Output Type":"Triac","Mounting Type":"Through Hole","Package / Case":"4-DIP (0.300\\\", 7.62mm)","Approval Agency":"CQC, cUL, UL, VDE","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"1kV/µs","Current - Hold (Ih)":"400µA (Typ)","Voltage - Isolation":"5300Vrms","Voltage - Off State":"800 V","Operating Temperature":"-55°C ~ 110°C","Zero Crossing Circuit":"No","Supplier Device Package":"4-DIP","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"50 mA","Current - LED Trigger (Ift) (Max)":"10mA","Current - On State (It (RMS)) (Max)":"100 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.14","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.14000","currency":"USD"},{"qty":10,"price":"$0.72200","currency":"USD"},{"qty":100,"price":"$0.53440","currency":"USD"},{"qty":500,"price":"$0.49106","currency":"USD"},{"qty":1000,"price":"$0.40440","currency":"USD"},{"qty":2000,"price":"$0.38419","currency":"USD"},{"qty":5000,"price":"$0.37552","currency":"USD"},{"qty":10000,"price":"$0.36685","currency":"USD"},{"qty":25000,"price":"$0.36108","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e11085510bee972151b7c5c68c7ea563.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is VOT8121AD a zero-crossing optocoupler?","answer":"No, the VOT8121AD has no zero-crossing circuit. The triac fires immediately when the LED current exceeds the trigger threshold, making it suited for phase-control or random-turn-on applications."},{"question":"What is the equivalent of VOT8121AD?","answer":"For a non-zero-crossing phototriac optocoupler in 4-DIP with 800 V off-state, consider parts from the same Vishay family or cross-reference with other manufacturers using the same 4-DIP footprint — verify trigger current and isolation rating against your BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay/VOT8121AD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay/VOT8121AD 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}}