{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DB3TG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"DB3TG","canonicalUrl":"https://icboms.com/stmicroelectronics/DB3TG","factsUrl":"https://icboms.com/api/mcp/products/DB3TG","rawCanonicalId":null},"summary":{"shortDescription":"ST DB3TG DIAC, 30-34V breakover, 2A peak output, 15 µA breakover current, DO-35 axial package, -40°C to 125°C junction temperature.","salesMarkdown":"The ST DB3TG is a DIAC — a bidirectional trigger diode — with a breakover voltage range of 30 to 34 V and a peak output current rating of 2 A. It is used in phase-control circuits to fire a triac gate at a precise voltage threshold, common in light dimmers, motor speed controls, and heater regulators. The DO-35 axial package suits through-hole assembly on single-sided boards or point-to-point wiring in legacy power modules. The 30-34 V breakover window sets the firing threshold for the triac; a DIAC with a tighter or shifted range would change the conduction angle at a given RC timing constant. The 15 µA breakover current is low enough that the timing RC network does not need a high-current driver, keeping the control-side component count down. ST officially lists the DB3TG as obsolete. It is no longer in volume production, so new designs should not target this order code.","metaTitle":"ST DB3TG DIAC, 30-34V Breakover, 2A Peak, DO-35","metaDescription":"ST DB3TG DIAC with 30-34V breakover voltage, 2A peak output, DO-35 axial package. Breakover current 15 µA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Package / Case":"DO-204AH, DO-35, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"DB3","Current - Breakover":"15 µA","Voltage - Breakover":"30 ~ 34V","Current - Peak Output":"2 A","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"DO-35"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4000","priceTiers":[{"qty":1,"price":"$0.42000","currency":"USD"},{"qty":10,"price":"$0.34000","currency":"USD"},{"qty":100,"price":"$0.23130","currency":"USD"},{"qty":500,"price":"$0.17350","currency":"USD"},{"qty":1000,"price":"$0.13013","currency":"USD"},{"qty":2000,"price":"$0.11935","currency":"USD"},{"qty":5000,"price":"$0.11935","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5b0f42651cb68a33ee7da1c234771c86.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/DB3TG/alternatives.json"},"ai":{"faq":[{"question":"Does DB3TG come in a DO-35 package?","answer":"Yes, the DB3TG is supplied in a DO-35 axial package (DO-204AH variant)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/DB3TG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/DB3TG 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}}