Transient Voltage Suppressor Diode is an efficient protective device in the form of a diode. This device is frequently used in the primary protection section of circuits to address overvoltage situations. It is important to distinguish between TVS and clamping diodes, as they are not the same.
- Clamping Diodes
Standard diodes and Zener diodes can also be used for overvoltage/transient protection. However, they are not as robust as transient voltage suppressor diodes because standard diodes and Zener diodes are specifically designed for rectification and voltage regulation.
- Transient Events in Circuits
Transient events in circuits can be caused by internal or external connections. For example, internal transient events may occur due to poor contact in switches or switches and connectors in inductive loads. Externally, transient events may occur due to lightning or induced switches.
- TVS Diode Symbol
Unidirectional TVS,
Bidirectional TVS
- Futures of TVS Diode
Bidirectional diodes have identical characteristic curves in both the positive and negative directions, making their connection to the circuit irrelevant. In comparison to the negative direction, the unidirectional diode has a higher forward voltage.
- Principle TVS Diode
When the induced voltage surpasses the avalanche breakdown potential, the device operates by diverting excess current. It is a clamping device capable of suppressing all overvoltages higher than its breakdown voltage.
