: A critical parameter for AC applications is the symmetry of the breakover voltage. A good DIAC will have a VBO for the positive polarity that is very close to that for the negative polarity, typically within 3 to 4 volts. This ensures balanced triggering in both halves of the AC cycle.
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.
: 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. diac db2 datasheet pdf 14 top
– If you confirm the manufacturer (e.g., STMicroelectronics, NXP, or a generic DB2 DIAC), I can point you to official sources.
| Model | VBO (Typ) | IBO Max | ITM Max | Package | dv/dt (min) | |-------|-----------|---------|---------|---------|--------------| | | 32V | 200 µA | 2A | DO-35, SMD | 50 V/µs | | DB3 | 32V | 50 µA | 2A | DO-35 | 50 V/µs | | DB4 | 40V | 50 µA | 2A | DO-35 | 50 V/µs | | EB2 | 32V | 200 µA | 1A | SOD-123 | 30 V/µs | | BR100 | 30V | 100 µA | 1A | DO-41 | 20 V/µs | : A critical parameter for AC applications is
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 DB2 is commonly used in circuits where precise, symmetrical switching is needed: This defines the thermal limits for safe operation
The DB series DIACs are manufactured with a hermetically sealed, glass-passivated construction. This provides excellent protection against environmental contaminants (moisture, dust) and ensures long-term reliability and stable electrical performance over the device's lifetime.
Possibly, but with caution. A DB3 has a typical breakover voltage of 32V, while a DB2 has a lower breakdown voltage, typically around 30V. Before substituting, be sure to review the datasheet of both components and check your circuit's specifications to ensure compatibility.
The following specifications are typical for the DB2/DB3 series DIACs: Breakover Voltage ( VBOcap V sub cap B cap O end-sub
The layout ensures that the device maintains near-identical electrical traits regardless of the applied voltage polarity. Unlike a standard breakdown diode, a DIAC exhibits a . When the voltage across its terminals reaches a specific threshold (the breakover voltage, VBOcap V sub cap B cap O end-sub
