Transienttijännitesuppressoreita

Transienttijännitesuppressoreita, often abbreviated as TVS diodes, are electronic components designed to protect sensitive circuitry from voltage transients. These transients are sudden, short-duration surges of voltage that can occur due to various factors, such as lightning strikes, electrostatic discharge (ESD), or switching of inductive loads. TVS diodes are a type of voltage-regulating device that clamps the voltage to a safe level, preventing damage to downstream components.

A TVS diode operates by presenting a very high impedance at normal operating voltages. However, when a transient voltage exceeds its breakdown voltage, the diode rapidly switches to a low impedance state, effectively shunting the excess current away from the protected circuit. Once the transient event has passed and the voltage returns to normal levels, the TVS diode reverts to its high impedance state, allowing normal operation to resume.

TVS diodes are available in both unidirectional and bidirectional configurations. Unidirectional TVS diodes protect against transients in one direction only, while bidirectional TVS diodes protect against transients in both polarities, making them suitable for AC applications or circuits where voltage polarity can reverse. They are characterized by their standoff voltage, breakdown voltage, clamping voltage, and peak pulse power. Choosing the correct TVS diode involves matching these parameters to the specific protection requirements of the circuit. Their fast response time and ability to absorb significant energy make them a crucial component in safeguarding modern electronic devices.