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 While formal modern "DB2" datasheets are scarce as it has largely been replaced by the
The DB2 serves as a starting element in electronic ballasts for fluorescent lighting. 5. Heat Control Circuits
: They are built with glass passivation for enhanced stability and protection against junction contamination, supporting operating temperatures up to 125∘C125 raised to the composed with power cap C Key Specifications Typical Value Breakover Voltage ( VBOcap V sub cap B cap O end-sub ) ~32V (varies by model) Repetitive Peak Current ( ITRMcap I sub cap T cap R cap M end-sub ) Breakover Voltage Symmetry Power Dissipation Operating Temperature -40 to +125 Typical Applications diac db2 datasheet pdf 14 top
Searching for "diac db2 datasheet pdf 14 top" on Google often returns aggregated sites (Alldatasheet, Datasheet4U, etc.). While convenient, always cross-reference with the original manufacturer.
The DIAC controls the power supplied to universal motors (used in vacuum cleaners, drills, and fans) by controlling the trigger point of a TRIAC in series with the motor. 3. Light Dimmer Circuits is an older or discontinued bidirectional trigger diode
: Provides technical papers for trigger diodes that cover DB2-compatible specifications. DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
The DB2 has a (typically between 30V and 34V). This symmetry is crucial for AC applications, ensuring the DIAC triggers at the same voltage magnitude on both half-cycles. A poorly matched DIAC introduces even-order harmonics and flicker in dimmers. Heat Control Circuits : They are built with
(Breakover Voltage) - Minimum: The minimum voltage at which the DIAC starts conducting (typically 25V for many DB2 variations). VBOcap V sub cap B cap O end-sub
AC Mains | LOAD | / \ DIAC DB2 / \ | | |--------●----- G | | | ----- TRIAC | (e.g., BT136) C R | (R/C snubber) A2 | | Neutral -----------
Designed to consistently trigger at the designed voltage, reducing jitter in dimmer circuits. DB2 DIAC Operating Principle and Circuit Application
Whether you're designing a dimmer switch, troubleshooting a power control circuit, or selecting components for a new project, this guide will provide you with all the essential information.
