{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACS108-8SN-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ACS108-8SN-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/ACS108-8SN-TR","factsUrl":"https://icboms.com/api/mcp/products/ACS108-8SN-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ACS™/A.S.D® series, TRIAC Logic - Sensitive Gate, Single, 800 V Off State, 800 mA RMS On State, Surface Mount, TO-261-4, SOT-223.","salesMarkdown":"## What this TRIAC is and where it fits The STMicroelectronics ACS108-8SN-TR is a logic-level sensitive-gate TRIAC from the ACS™/A.S.D® series, rated for 800 V off-state voltage and 800 mA RMS on-state current. It is a single-configuration device in a surface-mount SOT-223 package (TO-261-4). The sensitive gate (10 mA max trigger current, 1 V max trigger voltage) lets a microcontroller or logic output drive it directly, eliminating the driver transistor and its associated BOM cost. Typical applications include small appliance controls, solid-state relays for fan or pump switching, and lighting dimmers or flashers where the load is under 800 mA. The operating junction temperature range of -30°C to 125°C covers most indoor and outdoor commercial/industrial environments. ## 800 V off-state and 800 mA on-state — what they mean for the BOM The 800 V off-state voltage (Vdrm) provides headroom for mains switching. The 800 mA RMS on-state current (It(RMS)) is the continuous load limit. ## SOT-223 package — rework and board-fit notes The SOT-223 (TO-261-4) is a surface-mount package with a large tab for thermal dissipation. The tab is electrically connected to the MT2 terminal. ## Lifecycle and sourcing posture The ACS108-8SN-TR is listed as Active with ROHS3 compliance. There is no last-time-buy or obsolescence notice.","metaTitle":"STMicroelectronics ACS108-8SN-TR TRIAC, 800 V, 800 mA","metaDescription":"STMicroelectronics ACS108-8SN-TR logic-level TRIAC, 800 V off-state, 800 mA RMS, SOT-223 surface mount. Active, ROHS3 compliant. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"ACS™/A.S.D®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Series":"ACS™/A.S.D®","Package":"Tape & Reel (TR); Cut Tape (CT)","Triac Type":"Logic - Sensitive Gate","Configuration":"Single","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","lifecycle_stage":"eol_hot","Voltage - Off State":"800 V","Operating Temperature":"-30°C ~ 125°C (TJ)","Supplier Device Package":"SOT-223","Current - Hold (Ih) (Max)":"10 mA","Current - Gate Trigger (Igt) (Max)":"10 mA","Voltage - Gate Trigger (Vgt) (Max)":"1 V","Current - On State (It (RMS)) (Max)":"800 mA","Current - Non Rep. Surge 50, 60Hz (Itsm)":"13A, 13.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.54100","currency":"USD"},{"qty":100,"price":"$0.41510","currency":"USD"},{"qty":500,"price":"$0.32818","currency":"USD"},{"qty":1000,"price":"$0.27090","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cdcfef4fb816333977b917492eb8ea69.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of ACS108-8SN-TR?","answer":"The closest functional peer is the ACS108-6SA-TR, which is a through-hole version with a 600 V off-state rating. For a surface-mount 800 V alternative with higher current, consider the ACST610-8GTR (6 A rating). Neither is a direct pin-compatible second source."},{"question":"Does ACS108-8SN-TR have an SOT-223 package?","answer":"Yes, the supplier device package is SOT-223 (TO-261-4). The tab is electrically connected to the MT2 terminal."},{"question":"Does ACS108-8SN-TR require a snubber circuit?","answer":"The ACS108-8SN-TR is a logic-level sensitive-gate TRIAC. For inductive loads (motors, solenoids, transformers), a snubber (RC network) across the TRIAC is recommended to prevent false triggering from voltage transients. For purely resistive loads, a snubber is typically not required."},{"question":"What is the typical application for ACS108-8SN-TR?","answer":"Typical applications include small appliance controls, solid-state relays for fan or pump switching, and lighting dimmers or flashers where the load is under 800 mA RMS."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ACS108-8SN-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ACS108-8SN-TR 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}}