ERZ-VF2M361 Circuit Protection

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TVS (Transient Voltage Suppressors) as well as Varistors, MOVs etc. are components which are designed to protect sensitive electronic devices from voltage surges and transient overvoltages. The ERZ-VF2M361 Varistor is a variable resistance, nonlinear component manufactured by Panasonic that is designed to ensure the overvoltage protection of equipment from transient conditions. This varistor is designed for such applications as AC adapters, Switching Mode power supplies, circuit protection and so on.

The main components of the ERZ-VF2M361 Varistor are a ceramic disk with high density Metal-Oxide Power-Rail (MOPR) deposited on both its sides. The MOPR is then gasified, allowing a very large area current and power dissipation to be absorbed when subjected to transient voltages. This allows the device to offer high surge current capabilities and low clamping voltage.

In operation, when a voltage surge is applied to the Varistor, the resistance is low and as the voltage increases, the resistance gradually increases. This feature not only reduces the current but also prevents premature triggering of the Varistor due to overvoltage. During normal operation, the resistance increases almost linearly at any voltage below Rated Voltage, resulting in good repeatability when subjected to periodic surges.

The ERZ-VF2M361 also features a multi-stage discharge circuit which provides improved ESD protection for sensitive components. The voltage between the electrodes of the multi-stage circuit is monitored to ensure overvoltage protection. This circuit also helps in suppression of voltage transients and fast turn-off of the Varistor at the end of a surge.

The main application fields for the ERZ-VF2M361 Varistor include power supply, switch-mode power supplies, AC adapters, protection circuits, and industrial control and instrumentation circuits. It is especially suitable for use in circuits where transient voltages may occur, and can be precisely controlled and adjusted so as to provide the optimum protection for the device or circuit. The small size of the form factor makes it ideal for use in high-density applications.

Overall, the ERZ-VF2M361 Varistor is an excellent choice for providing surge protection against accidental overvoltage spikes in AC adapters, power supplies, and protection circuits. It is a compact and reliable component with a wide range of features and capabilities that make it a great choice for these applications.

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