V120ZS4

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Varistors, also known as a voltage-dependent resistor (VDR), are electrical components that contain two or more power-conducting electrodes encapsulated within a non-conducting material. Varistors are non-adjustable resistors that have a variable resistance with respect to applied voltage. They reduce the amount of voltage that goes through an electrical circuit.

In the electronics industry, these components are often referred to as transient voltage suppressors (TVS or transient voltage suppressor devices), metal oxide varistors (MOV\'s) and silicon avalanche devices (SAD\'s). These terms all refer to the same type of device and their use is typically the same.

The V120ZS4 varistor is one of the most popular varistors used in many applications. It is basically a 2-terminal device with a metal oxide material filled with zinc oxide as the main component. It has a rated voltage from 10 to 470V and a wide temperature rating from -40 to 85℃. It is also available in two different polarities, NOC and Pb-free.

The V120ZS4 is designed to protect a system against excessive voltages or transients in the power supply line. It reduces the peak voltage of an electrical surge and bridges the gap between power supply surges and the levels supported by the application’s components.

The V120ZS4 has a working principle based on reverse breakdown. When the voltage applied to the varistor reaches a certain level, the resistance rapidly changes from high to low. This allows the high-energy surge to pass through the varistor, but quickly dissipates the energy before it can cause any damage to the system or application components. This process is known as "clamping" or "snubbering". The transient voltage suppressor device can help protect the system or application from any possible damage incurred from external voltage spikes or surges.

The V120ZS4 device is used in various applications such as surge protection for AC/DC power supplies, DC motors, automotive systems, telecom/telephone systems, consumer electronics, medical equipment, industrial equipment, military systems, and more. It is a crucial component for any system that needs reliable surge protection. All V120ZS4 varistors have passed UL 1449 4th edition certification.

In summary, the V120ZS4 is a two-terminal device with a metal oxide material filled with zinc oxide as the main component. It has a wide temperature rating from -40 to 85℃ and a rated voltage from 10 to 470V. The varistor works by rapidly changing its resistance from high to low when a certain voltage level is reached, allowing it to absorb and dissipate the energy from any voltage spikes or surges. It can help protect various electronic systems and applications from possible damage caused by these excessive or transient voltages.

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