Diac Db2 Datasheet Pdf 14 Top -
The DB2 has a nominal VBO of 32V (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.
Before analyzing the DB2 specifically, let us revisit the fundamentals. A DIAC is a two-terminal, bidirectional semiconductor device that conducts current only after its breakover voltage has been exceeded. Unlike a diode, which conducts in one direction, a DIAC conducts in both directions once the voltage across it reaches the breakover point (typically ±28 to ±36 volts for the DB2 series).
The DB2 is a popular variant because its symmetrical switching characteristic generates a clean trigger pulse for a TRIAC gate, making it ideal for dimmers, motor speed controllers, and heat regulators. diac db2 datasheet pdf 14 top
| 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 |
If you cannot find a DB2, consider these equivalents: The DB2 has a nominal VBO of 32V
Always verify the VBO range from the datasheet PDF before substituting.
Pro Tip: When you download the PDF, search inside the document for "VBO" and "32V". If the document does not list the 14 parameters above, it is either an incomplete translation or a counterfeit datasheet. | Your Query | Answer | |------------|--------| |
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.
Beyond the statistical datasheet values, engineering wisdom dictates another "14 Top" – the top 14 design considerations when using the DB2 in real products.
| Replace DB2 with: | Reason | |-------------------|--------| | DB3 | V_BO = 28-36V (identical spec) | | DB4 | V_BO = 35-45V (slightly higher) | | HT-32 | V_BO = 28-36V |
