Advancements in power TVS diodes have made them an effective alternative to metal oxide varistors (MOVs) in protecting AC and DC power supplies from power line surges and indirect lightning strikes. These devices not only provide improved reliability and increased durability against repetitive surges when compared to MOVs in AC and DC power line applications, their use of surface mount packaging delivers an enhanced surge response due to lower lead inductance.

An important element of the circuit protection design must limit the peak surge voltage to an acceptable level and by not short-circuiting the line for an extended period of time. Advancements in power TVS diodes have made them optimal solution to meet the demands of these applications, and offer a more effective alternative to metal oxide varistors (MOVs). For example, the peak voltage of a MOV at its maximum rated current can be as much as three times its breakdown voltage at low current.  

Power TVS diodes have become an effective alternative to metal oxide varistors (MOVs) in protecting AC and DC power supplies from power line surges and indirect lightning strikes, due to their improved reliability and increased durability against repetitive surges in AC and DC power line applications.

Here, we will discuss the basics of power TVS diode design and how these devices provide improved reliability and increased durability against repetitive surges when compared to MOVs in AC and DC power line applications. It will also illustrate the benefits of surface mount packaging in delivering enhanced surge response, due to its lower lead inductance, for a more robust circuit protection design.