is an older or discontinued bidirectional trigger diode (DIAC) often found in legacy AC dimmer or starter circuits. While formal modern "DB2" datasheets are scarce as it has largely been replaced by the
, it is part of the same functional family used for triggering TRIACs and SCRs. RS Components Technical Overview
A DIAC acts as a bidirectional switch that conducts current only after its breakover voltage ( cap V sub cap B cap O end-sub is reached. RS Components Replacement is the industry standard substitute for the DB2.
: Used in light dimmers, motor speed controls, and fluorescent lamp ballasts.
: These components cannot be tested with a standard multimeter "diode check" because their conduction threshold (typically is greater than 28 cap V ) exceeds the meter's battery voltage. Specifications (Typical for DBx Series)
Since DB2 is frequently grouped with or replaced by the DB3/DB4 series, its performance follows these general parameters: DB3 (Standard) DB4 (High V) Breakover Voltage cap V sub cap B cap O end-sub Breakover Current cap I sub cap B cap O end-sub Peak Pulse Current cap I sub cap T cap R cap M end-sub Operating Temp cap T sub j -40 to +125 -40 to +125 Direct Datasheet Resources diac db2 datasheet pdf 14 top
For detailed electrical curves and mechanical dimensions (DO-35 package), you can refer to these authoritative technical papers for the current series: STMicroelectronics DB3/DB4 Datasheet : Official documentation for the standard replacement part. Diotec Semiconductor DB32 Datasheet : Alternative manufacturer specifications for 32V DIACs. Littelfuse DIAC Series
: Aggregated technical listings for various DB-marked trigger diodes. STMicroelectronics circuit diagram showing how to integrate this DIAC into a standard TRIAC-based dimmer DIAC DB2 DIODE Datasheet(PDF) - ALLDATASHEET.COM
Introduction
The Diac DB2 is a type of diode used in electronic circuits for various applications. A datasheet is a document that provides detailed information about a component, including its electrical characteristics, physical properties, and application notes. In this write-up, we will explore the top 14 datasheet PDFs for the Diac DB2.
What is a Diac DB2?
The Diac DB2, also known as a bidirectional diode or a trigger diode, is a type of semiconductor device that consists of two diodes connected in anti-parallel. It is commonly used in applications such as triggering triacs, controlling inductive loads, and protecting circuits from voltage surges.
Importance of Datasheet
A datasheet is an essential document for engineers, technicians, and designers working with electronic components. It provides critical information about the component's performance, reliability, and application guidelines. For the Diac DB2, a datasheet PDF is a valuable resource that helps users understand its electrical characteristics, such as voltage and current ratings, and how to use it in various circuits.
Top 14 Diac DB2 Datasheet PDFs
Here are 14 datasheet PDFs for the Diac DB2 from reputable sources: is an older or discontinued bidirectional trigger diode
Conclusion
The Diac DB2 is a widely used electronic component, and having access to reliable datasheets is crucial for designing and building electronic circuits. The top 14 datasheet PDFs listed above provide a comprehensive resource for engineers, technicians, and designers working with the Diac DB2. By consulting these datasheets, users can gain a deeper understanding of the component's electrical characteristics, application guidelines, and reliability information.
A 50 V/µs minimum guaranteed dv/dt immunity means the DB2 will not false-trigger due to fast voltage transients from inductive loads. This makes it reliable in motor speed controllers.
Before diving into the datasheet specifics, let’s establish a baseline. A DIAC is a bidirectional trigger diode. Unlike a standard diode, it conducts current only after its breakover voltage (VBO) is exceeded in either direction. Once triggered, it exhibits negative resistance, dropping the voltage across it and allowing a surge of current to fire a TRIAC gate.
The DB2 is a surface-mount or through-hole DIAC widely produced by manufacturers like STMicroelectronics, Diotec, and EIC Semiconductor. It is optimized for low-cost, high-volume AC switching applications. ON Semiconductor : "DB2 Datasheet" (PDF) - A
| Your Query | Answer | |------------|--------| | DB2 DIAC | Standard bidirectional trigger diode, V_BO = 28–36V | | Datasheet PDF | Available from ST, Diotec, etc. Search "DB2 DIAC datasheet" | | "14 top" meaning | Likely a date code (e.g., week 14 of 2014 or 2024), not 14V breakover | | Package | DO-35 (not TO-14). TO-14 does not exist for DIACs |