ERZ-VF2M820 Circuit Protection

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TVS - Varistors, MOVs, are surge protectors used to reduce the intensity of voltage when there is a sudden voltage increase or over voltage. It is mostly used to protect electronic circuit boards. The ERZ-VF2M820 is a SMD Littelfuse UPET/UPP Varistor which provides protection against voltage surges by means of a metal-oxide varistor, which contains special granules of zinc-oxide compound. The ERZ-VF2M820 is a direct drop-in replacement for Littelfuse C40P185X520M1V0 filters.

The ERZ-VF2M820 is designed for power systems up to 20A and is suitable for applications such as power distribution systems, broadcast equipment, and data communications equipment. It has a voltage peak memory of up to 0.4V with a breakdown voltage of 20V and a clamping voltage of 2V. It also has a maximum surge energy rating of 5J and a capacitance of 0.1uF. The device is available in a variety of surface mount packages with a reflow rating of 150°C, making it suitable for applications in high temperature environments.

The working principle of the ERZ-VF2M820 is based on the behavior of metal-oxide. When a metal-oxide varistor is exposed to a certain voltage level, the zinc-oxide granules start to collect electrons, which will lead to an increase in resistance. This resistive load will reduce the amount of current passing through the device, therefore limiting the amount of voltage passed through. As the voltage increases, the resistor will start to dissipate energy as heat, further reducing the amount of voltage passing through the component. This process will eventually form a stable and safe voltage flow for the component.

The ERZ-VF2M820 is made up of two components: the MOVs and the capacitor. The MOVs has the primary job of absorbing and dissipating excess energy quickly, while the capacitor is responsible for absorbing the small energy spikes that accompany the MOVs. The capacitor is also able to withstand a momentary over voltage, in order to keep the voltage levels stable and safe.

In summary, the ERZ-VF2M820 is an excellent Varistor and MOVs device designed to protect the circuits and components from voltage surges. It has a high energy absorption rating and is capable of handling overvoltage. It also has excellent temperature characteristics and is suitable for a variety of power systems. The combination of MOV and capacitor elements provide reliable protection from short-term overvoltage, making the ERZ-VF2M820 an efficient and effective surge protection device.

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