VGAS120616N390DP Circuit Protection

TVS - Varistors, MOVs

The VGAS120616N390DP is a type of varistor that is particularly designed to provide effective clamping voltage and surge current capability in the SMA Series of Surface Mount Devices (SMDs). This type of varistor is specifically suited for the protection of high speed digital communication systems, such as Gigabit Ethernet and HDTV systems, as well as for ESD protection of sensitive ICs or other components. It is also suitable for use in applications requiring a high degree of reliability and noise immunity.

Application Field

The VGAS120616N390DP can be used to protect sensitive equipment from electromagnetic interference and transient voltage spikes. Its surge current capability of up to 16 Amperes peak makes it suitable for protection of high speed digital systems. It is also suitable for use in high frequency applications, as it has a low temperature coefficient that reduces the capacitance variation over temperature.

In addition, this type of varistor can also be used in medical device protection systems, as it has low leakage current that ensures safe operation of sensitive equipment such as pacemakers and other medical instruments. It can also be used for protection against lightning strike damage, and for electrostatic discharge protection of sensitive components.

Working Principle

The VGAS120616N390DP is a metal oxide varistor (MOV) device, which functions by providing a low impedance path for conductive transient spikes, thereby preventing the damaging energy from reaching sensitive circuitry. MOVs are essentially multilayer components consisting of zinc oxide grains separated by ceramic layers, forming a ceramic structure. The MOVs structure provides a non-linear voltage-current characteristic which can allow high transient currents to be suppressed without affecting normal operating characteristics and stability.

When a transient voltage spike strikes the varistor, the grains in the MOV will break down at a certain voltage level, providing a low impedance path for the energy. This allows the MOV to absorb the energy and dissipate it as heat, preventing it from reaching any sensitive circuitry or components. The MOVs low reluctance and impedance enable it to absorb and dissipate the energy of the transient quickly, which prevents any damage or loss of data.

The varistor is designed to function efficiently and reliably for thousands of surge events. As such, it is expected to last the life of the electronic product in which it is installed. Its superior construction and design make it suitable for use in a wide range of applications, including high speed digital systems and medical equipment.