{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTA12-400BRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTA12-400BRG","canonicalUrl":"https://icboms.com/stmicroelectronics/BTA12-400BRG","factsUrl":"https://icboms.com/api/mcp/products/BTA12-400BRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BTA12-400BRG, Standard Triac, Single, 12 A RMS On-State, 400 V Off-State, 50 mA Gate Trigger, TO-220-3 Through Hole, Tube.","salesMarkdown":"## 12 A, 400 V, 50 mA Igt — the ratings that define the load The STMicroelectronics BTA12-400BRG is a standard triac in a single-device TO-220 through-hole package. It is rated for 12 A RMS on-state current and 400 V off-state blocking voltage, with a maximum gate trigger current of 50 mA and a maximum gate trigger voltage of 1.3 V. These ratings set the load-switching capacity and the drive sensitivity for AC power control in applications like heater regulation, motor speed control, and lighting dimmers. ## Obsolete — sourcing from independent channels No official successor is recorded. ## Gate trigger current and surge capability The 50 mA maximum gate trigger current (Igt) is a standard sensitivity for medium-power triacs — it requires a driver capable of sourcing that level without dropping below the 1.3 V Vgt threshold. ## Hold current and conduction stability A maximum hold current (Ih) of 50 mA means the triac will latch on as long as the load current stays above that level. If the load current dips below 50 mA near the zero-cross, the device may commutate off prematurely — a consideration for lightly loaded or highly inductive circuits where a snubber network may be needed.","metaTitle":"BTA12-400BRG Triac, 12 A, 400 V, TO-220, Obsolete","metaDescription":"Standard triac, 12 A RMS on-state, 400 V off-state, 50 mA gate trigger. TO-220 through-hole. Obsolete per ST.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","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":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BTA12","Voltage - Off State":"400 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TO-220","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":"$0.3980","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/85c28189b0b04f91aca363a4c24a06e0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BTA12-400BRG/alternatives.json"},"ai":{"faq":[{"question":"What is the gate trigger current of BTA12-400BRG?","answer":"The maximum gate trigger current (Igt) is 50 mA, and the maximum gate trigger voltage (Vgt) is 1.3 V. These values set the minimum drive requirements for the control circuit."},{"question":"Can BTA12-400BRG be replaced with BTA12-600BRG?","answer":"The BTA12-600BRG is a higher-voltage variant (600 V off-state) within the same BTA12 family. It is pin-compatible and shares the same 12 A RMS rating, 50 mA Igt, and TO-220 package. It can serve as a functional replacement provided the circuit can tolerate the higher voltage rating — no downside in a 400 V application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTA12-400BRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTA12-400BRG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T16:24:49.031Z","lastPublished":"2026-07-16T16:24:49.031Z","indexable":true}}