The following are the parameters you will find on a standard diac db2 datasheet pdf .
But the engineers gave the DIAC a very specific breaking point. They designed it to hold its breath until the voltage hit roughly .
: 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
| Parameter | Value / Range | | --------------------- | ------------------------------------ | | | Bidirectional trigger diode (DIAC) | | Full name | Diode for Alternating Current (DB2) | | Breakover voltage (VBO) | Typically 28 V – 36 V (similar to DB3) | | Peak current | Up to 2 A (surge) | | Case style | DO-35 (glass axial lead) | | Operating temp. | –40 °C to +100 °C | | Typical application | AC dimmer, triac trigger, relaxation oscillator | diac db2 datasheet pdf 14 top
Many electronic ballasts for fluorescent lamps and compact fluorescent lamps (CFLs) use DIACs in their startup circuits. The DIAC provides a high-voltage pulse to initiate the arc in the lamp, ensuring a reliable and controlled start.
Here is the interesting story behind that number, and why it made the lights in your house possible.
: Used in conjunction with Triacs for smooth light intensity control. The following are the parameters you will find
If you look at page 14 (or the characteristics page) of a standard DB2 or DB3 DIAC datasheet, you will see a parameter called (Breakover Voltage). For the DB series, this is typically around 32 volts.
The phrase "" in your search likely refers to a DIL-14 (Top View) package diagram found on page 14 of certain general semiconductor datasheets or a specific layout in a component manual. However, the DB2 is a discrete two-terminal component and is almost always found in a small DO-35 axial lead package. Key Technical Specifications
What makes the DB2 "interesting" from an engineering perspective is its . Unlike a standard diode that works like a one-way valve, the DIAC is a multi-layer semiconductor (often 3 or 5 layers) that treats positive and negative voltage identically. : They are built with glass passivation for
) compared to the more common DB3 or DB4 is required for circuit stabilization.
Whether you're digging through old schematics or designing a simple AC controller, the DB2 represents a time when complex power problems were solved with elegant, solid-state physics rather than lines of code. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics