{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTA08-400CRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTA08-400CRG","canonicalUrl":"https://icboms.com/stmicroelectronics/BTA08-400CRG","factsUrl":"https://icboms.com/api/mcp/products/BTA08-400CRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BTA08-400CRG standard triac, 400 V off-state, 8 A RMS on-state, 25 mA gate trigger, TO-220-3 through-hole package, -40°C to 125°C.","salesMarkdown":"## What this triac is and where it fits The STMicroelectronics BTA08-400CRG is a standard triac rated for 400 V off-state and 8 A RMS on-state current, housed in a TO-220-3 through-hole package. It is a general-purpose AC switch for loads like resistive heaters, small motors, lighting dimmers, and solid-state relays in industrial and commercial equipment. The 25 mA gate trigger current and 25 mA holding current are typical for standard triacs, making it compatible with common optocoupler and logic-level drive circuits. ## Temperature range and environment Rated for -40°C to 125°C junction temperature. The heatsink must keep the junction below 125°C. ## Lifecycle and sourcing The BTA08-400CRG is listed as Active and ROHS3 compliant. It is a current-production part from STMicroelectronics, so no last-time-buy risk. For dual-sourcing or a higher voltage variant, the BTA08-600CRG (600 V off-state) is a direct pin-compatible alternative with the same 8 A rating and package. The BTB08-600CRG is another 600 V option, also standard gate. If you need a sensitive-gate version for low-current logic drive, the BTA08-600TWRG is the one to look at — same package, but the gate trigger drops to a few milliamps.","metaTitle":"STMicroelectronics BTA08-400CRG TRIAC, 400V 8A, TO-220-3","metaDescription":"Standard triac, 400 V off-state, 8 A RMS on-state, 25 mA gate trigger. TO-220-3 through-hole. Active, ROHS3. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tube","Triac Type":"Standard","Configuration":"Single","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Voltage - Off State":"400 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TO-220","Current - Hold (Ih) (Max)":"25 mA","Current - Gate Trigger (Igt) (Max)":"25 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"8 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"80A, 84A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.57","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.57000","currency":"USD"},{"qty":10,"price":"$1.40600","currency":"USD"},{"qty":100,"price":"$1.13000","currency":"USD"},{"qty":500,"price":"$0.92842","currency":"USD"},{"qty":1000,"price":"$0.87588","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0487bb02ea1e8827bd4e76ea03ec24d7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy BTA08-400CRG?","answer":"We source it through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What is the maximum current rating of BTA08-400CRG?","answer":"The maximum on-state current is 8 A RMS continuous. The non-repetitive surge rating is 80 A at 50 Hz and 84 A at 60 Hz."},{"question":"Can I use BTA08-400CRG for 240V AC control?","answer":"Yes. The 400 V off-state rating gives enough headroom for 240 V AC mains, with margin for typical line transients."},{"question":"What is the pinout of BTA08-400CRG?","answer":"Looking at the front of the TO-220 package with the leads down, pin 1 is MT1, pin 2 is MT2 (connected to the metal tab), and pin 3 is the gate."},{"question":"What is the replacement for BTA08-400CRG?","answer":"For a higher voltage version, the BTA08-600CRG (600 V off-state) is a direct pin-compatible replacement. For a sensitive-gate version, use the BTA08-600TWRG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTA08-400CRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTA08-400CRG 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}}