{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTA12-800BRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTA12-800BRG","canonicalUrl":"https://icboms.com/stmicroelectronics/BTA12-800BRG","factsUrl":"https://icboms.com/api/mcp/products/BTA12-800BRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BTA12-800BRG standard triac, 800 V off-state, 12 A RMS on-state, TO-220AB insulated through-hole package, tube.","salesMarkdown":"## What the 800 V / 12 A rating means on the bench The BTA12-800BRG is a standard triac from STMicroelectronics' BTA12 family, rated for 800 V off-state blocking and 12 A RMS on-state current in a TO-220AB insulated package. The 800 V off-state voltage means it can switch loads on a 480 VAC line with margin — the peak of a 480 VAC sine wave is about 679 V, so the 800 V rating gives 121 V of headroom for transients. The 12 A RMS rating is the continuous current limit at a 25 °C case temperature; derate for higher ambient or if the heatsink is undersized. The 126 A non-repetitive surge current at 60 Hz (120 A at 50 Hz) tells you what the die can survive for one half-cycle — motor inrush, capacitor charging, or a lamp cold-start. If your load draws more than 126 A peak even once, this part will crack. ## Gate drive and holding current — what triggers it and what keeps it on Gate trigger current (Igt) is 50 mA max, and gate trigger voltage (Vgt) is 1.3 V max. That means a standard microcontroller GPIO with a current-limiting resistor, or an MOC30xx optocoupler, can fire it without a separate driver stage. The 50 mA holding current (Ih) means the triac stays latched as long as the load current stays above about 50 mA — below that, it drops out at the next zero-cross. For a very light load (a small relay coil or an LED indicator), the triac may not stay on; you'll see half-wave conduction or chatter. ## Package and mounting — TO-220AB insulated saves a mica washer The TO-220AB insulated package means the metal tab is electrically isolated from the die — no mica washer or thermal pad needed when bolting to a heatsink. The mounting hole is standard for a #6 or M3 screw. Through-hole mounting is straightforward for prototype builds and low-volume production; for high-volume, a TO-220 is slower to insert than a surface-mount D²PAK, but the insulated tab simplifies assembly. ## Sourcing and availability This part is sourced through independent distribution channels. No stock-holding claim — quoted to order against the BOM quantity.","metaTitle":"STMicroelectronics BTA12-800BRG Triac, 800V 12A TO-220AB","metaDescription":"Standard triac, 800 V off-state, 12 A RMS, TO-220AB insulated. Active production, ROHS3 compliant. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Triac Type":"Standard","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"BTA12","Voltage - Off State":"800 V","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"TO-220AB Insulated","Current - Hold (Ih) (Max)":"50 mA","Current - Gate Trigger (Igt) (Max)":"50 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"12 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"120A, 126A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0600","priceTiers":[{"qty":1,"price":"$2.06000","currency":"USD"},{"qty":10,"price":"$1.71500","currency":"USD"},{"qty":100,"price":"$1.36490","currency":"USD"},{"qty":500,"price":"$1.15488","currency":"USD"},{"qty":1000,"price":"$0.97990","currency":"USD"},{"qty":2000,"price":"$0.93091","currency":"USD"},{"qty":5000,"price":"$0.89591","currency":"USD"},{"qty":10000,"price":"$0.86625","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5ef651cdc3141726518fd3e56c11b109.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BTA12-800BRG/alternatives.json"},"ai":{"faq":[{"question":"Will BTA12-800BRG drop into a board designed for BTA12-600BRG?","answer":"Yes — the BTA12-600BRG is the 600 V off-state sibling in the same TO-220AB insulated package. Same gate drive (50 mA Igt), same 12 A RMS rating, same pinout. The only difference is the voltage blocking: 800 V vs 600 V. If your board was built for 240 VAC or lower, the 600 V part works; the 800 V part adds headroom for higher line voltages or transient-prone environments."},{"question":"What is the difference between this standard triac and the Snubberless BTA12-800BWRG?","answer":"The BTA12-800BWRG and BTA12-800CWRG are Snubberless™ (Alternistor) types — they have a different die structure that handles higher dV/dt without false triggering, so they don't need an RC snubber across the load. The standard BTA12-800BRG is fine for resistive and inductive loads with a snubber; if your board has no snubber and you see false turn-ons, the Snubberless variants are the swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTA12-800BRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTA12-800BRG 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}}