{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BTA41-400BRG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BTA41-400BRG","canonicalUrl":"https://icboms.com/stmicroelectronics/BTA41-400BRG","factsUrl":"https://icboms.com/api/mcp/products/BTA41-400BRG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BTA41-400BRG, Standard Triac, Single, 400 V Off State, 40 A RMS On State, 400 A / 420 A Non-Rep Surge, TOP-3 Insulated, Through Hole, -40°C to 125°C.","salesMarkdown":"## 40 A, 400 V standard triac in TOP-3 insulated The STMicroelectronics BTA41-400BRG is a standard triac rated for 40 A RMS on-state current and 400 V off-state voltage, housed in a TOP-3 insulated through-hole package. It handles non-repetitive surge currents of 400 A at 50 Hz and 420 A at 60 Hz, making it a fit for AC load switching in industrial motor drives, HVAC contactors, and power controllers where the insulated tab simplifies heatsink mounting without extra isolation hardware. The 40 A RMS current rating sets the continuous load capability — size the heatsink and PCB traces for that level, and derate for ambient temperature above 25 °C. The 400 V off-state voltage suits 230 VAC and 277 VAC line switching with margin for mains transients. Gate trigger current is 50 mA max and gate trigger voltage 1.3 V max, so standard logic-level or microcontroller-driven optotriac circuits can fire it directly. Hold current of 80 mA max means the triac stays latched once triggered unless the load current drops below that threshold — check your minimum load if driving a small transformer or LED dimmer. There is no official ST successor listed for this order code. That saves assembly steps and reduces thermal resistance compared to a non-isolated package with a mica spacer.","metaTitle":"STMicroelectronics BTA41-400BRG Triac, 40 A RMS, 400 V","metaDescription":"ST BTA41-400BRG standard triac, 40 A RMS on-state current, 400 V off-state, 400 A surge, TOP-3 insulated package. Request quote.","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":"TOP-3 Insulated","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BTA41","Voltage - Off State":"400 V","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"TOP3","Current - Hold (Ih) (Max)":"80 mA","Current - Gate Trigger (Igt) (Max)":"50 mA","Voltage - Gate Trigger (Vgt) (Max)":"1.3 V","Current - On State (It (RMS)) (Max)":"40 A","Current - Non Rep. Surge 50, 60Hz (Itsm)":"400A, 420A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.0800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f75e4fee7ab756d2e0e2fe0c1c92eede.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BTA41-400BRG/alternatives.json"},"ai":{"faq":[{"question":"Is BTA41-400BRG obsolete and can I still buy it?","answer":"Yes, BTA41-400BRG is officially obsolete per STMicroelectronics."},{"question":"What is a replacement for BTA41-400BRG?","answer":"A common cross-shop candidate is the BTA41-600BRG, which shares the same 40 A RMS rating and TOP-3 insulated package but has a 600 V off-state voltage instead of 400 V. The higher voltage rating gives extra margin on 277 VAC lines, but the trigger and hold currents are the same. Verify pin compatibility and thermal performance in your application before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BTA41-400BRG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BTA41-400BRG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:33:02.551Z","lastPublished":"2026-07-16T14:33:02.551Z","indexable":true}}