{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACST1210-7T","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ACST1210-7T","canonicalUrl":"https://icboms.com/stmicroelectronics/ACST1210-7T","factsUrl":"https://icboms.com/api/mcp/products/ACST1210-7T","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ACS™/A.S.D® ACST1210-7T, Logic - Sensitive Gate TRIAC, 700 V Off State, 12 A RMS, Single Configuration, Through Hole, TO-220-3, -40°C ~ 125°C.","salesMarkdown":"## What this triac is and where it fits The STMicroelectronics ACST1210-7T is a logic-level sensitive-gate triac in the ACS™/A.S.D® series, rated for 700 V off-state voltage and 12 A RMS on-state current. The 10 mA max gate trigger current lets it switch directly from a microcontroller I/O pin or a low-power logic driver without a separate transistor stage. ## 12 A RMS — sizing the load and the heatsink The 12 A RMS on-state current is the continuous rating at a given case temperature. For a 120 VAC resistive load that works out to about 1440 W, or 2880 W at 240 VAC. The TO-220 tab needs a proper heatsink if you plan to run near the full 12 A; without one the junction temperature climbs fast. The non-repetitive surge rating of 120 A at 50 Hz and 126 A at 60 Hz covers the inrush from incandescent lamps, capacitive input supplies, or motor start-up — the part will survive the hit as long as it's not recurrent. ## 10 mA gate trigger — logic-level drive without extra parts With a maximum gate trigger current of 10 mA and a gate trigger voltage of 1 V, this triac qualifies as logic-level or sensitive-gate. A microcontroller pin can fire it directly through a current-limiting resistor. ## Temperature range and environment The junction temperature range of -40°C to 125°C covers industrial and outdoor equipment — think HVAC controls, vending machines, commercial kitchen appliances, and outdoor lighting. The 125°C upper limit is the junction temperature, so the case will run cooler; derate the current above 25°C case temperature per the datasheet curve. ## Lifecycle and compliance The ACST1210-7T is listed as Active in the lifecycle stage and is ROHS3 Compliant.","metaTitle":"ACST1210-7T Triac, 700V 12A, Sensitive Gate, TO-220","metaDescription":"STMicroelectronics ACST1210-7T logic-level triac, 700V off-state, 12A RMS, 10mA Igt, -40°C to 125°C. RoHS3 compliant, active production.","metaKeywords":null},"attributes":{"series":"ACS™/A.S.D®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"ACS™/A.S.D®","Package":"Tube","Triac Type":"Logic - Sensitive Gate","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"700 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"30 mA","Current - Gate Trigger (Igt) (Max)":"10 mA","Voltage - Gate Trigger (Vgt) (Max)":"1 V","Current - On State (It (RMS)) (Max)":"12 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"120A, 126A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.75","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.75000","currency":"USD"},{"qty":10,"price":"$1.57400","currency":"USD"},{"qty":100,"price":"$1.26480","currency":"USD"},{"qty":500,"price":"$1.03918","currency":"USD"},{"qty":1000,"price":"$0.98035","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a2749d462ffa11124e0cc958ef6213ed.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ACST1210-7T RoHS compliant?","answer":"Yes, the ACST1210-7T is ROHS3 Compliant per the manufacturer's listing."},{"question":"Can I use ACST1210-7T for 120V AC switching?","answer":"Yes. With a 700 V off-state voltage rating and 12 A RMS on-state current, it is well within the margin for 120 VAC mains switching, even with inductive or lamp loads that generate voltage spikes."},{"question":"What is the equivalent or replacement for ACST1210-7T?","answer":"A lower-current sibling is the ACST610-8T, rated at 6 A RMS and 800 V off-state. For a higher-temperature option, the T1210T-8FP and T1210T-8T are 12 A, 800 V parts rated to 150°C junction, but they are not pin-for-pin identical in package (T1210T-8FP is a TO-220FP insulated tab). Verify the footprint and isolation requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ACST1210-7T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ACST1210-7T 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}}