Diac — Db2 Datasheet Pdf 14 Top
Search "DB2 DIAC" → Under "Technical Resources" click "Datasheet".
You cannot test it with a standard multimeter's continuity or diode test. You need a variable DC power supply and a resistor. Connect the DIAC in series with a resistor, slowly increase the voltage, and measure the voltage across the DIAC. You will see it quickly "break over" and conduct once it reaches its VBO.
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 diac db2 datasheet pdf 14 top
Without the DB2, the TRIAC would turn on gradually, leading to inefficient switching and harmonic distortion.
, the device triggers into a negative resistance region, causing its internal resistance to drop sharply. This sudden shift permits a fast, high-amplitude current pulse to discharge, making it ideal for gating circuits. Because the device is fully bidirectional, it operates identically during both the positive and negative halves of the AC waveform. 2. Key Electrical Specifications and Datasheet Parameters Search "DB2 DIAC" → Under "Technical Resources" click
Understanding the DIAC DB2: Datasheet Breakdown, Technical Specifications, and Applications
Before breakdown, a very small leakage current flows. This is specified at a voltage slightly below VBO and is typically very low, often maximum . A low leakage current ensures the DIAC does not unintentionally trigger the TRIAC under normal operating voltages. Connect the DIAC in series with a resistor,
), the device switches from an insulating state to a highly conductive state. This sudden drop in internal resistance causes a steep rise in current, producing a fast-rising voltage pulse ideal for firing the gate of a larger power semiconductor like a TRIAC. Key Electrical Technical Specifications
This defines the thermal limits for safe operation and storage. A common range for these devices is . This wide range makes them suitable for use in a variety of environmental conditions.
The DB2 is a specific type of DIAC, widely recognized in the electronics industry. It is a designed to assist in the even triggering of TRIACs, making it a critical component in AC power control circuits.
If you’d like, I can:
