VAR20-250 Varistor: metal-oxide; THT; 250VAC; 320VDC; 390V; ±10%; 6.5kA; 240J

The VAR20-250 is a metal-oxide varistor (MOV) designed to protect electronic circuits from voltage surges and transient events. This device is designed for Through-Hole Technology (THT) mounting and is suitable for a wide range of applications where overvoltage protection is required. The VAR20-250 is rated for 250VAC and 320VDC, with a maximum clamping voltage of 390V. It can withstand surge currents up to 6.5kA and has an energy absorption capability of 240J. The varistor's voltage tolerance is ±10%. Metal-oxide varistors are voltage-dependent resistors that exhibit a highly nonlinear current-voltage characteristic.

At voltages below the varistor's rated voltage, it acts as a high-impedance device, drawing only a small leakage current. However, when the voltage exceeds the rated voltage, the varistor's impedance rapidly decreases, allowing it to conduct large currents and clamp the voltage to a safe level. The VAR20-250 is designed to protect sensitive electronic components from damage caused by voltage surges, such as those caused by lightning strikes, inductive switching, and electrostatic discharge (ESD). It is commonly used in power supplies, surge protectors, and various types of electronic equipment. The THT mounting makes it easy to install in various applications. The VAR20-250's high surge current and energy absorption capabilities provide robust protection against transient events.

The varistor's voltage tolerance of ±10% ensures that it will clamp the voltage within a specified range. When installing the VAR20-250, it's important to ensure that it is properly connected in parallel with the circuit being protected. The varistor should be located as close as possible to the protected components to minimize the effects of lead inductance. It's also important to consider the varistor's power dissipation and ensure that it is adequately cooled to prevent overheating. The VAR20-250 is a versatile and reliable varistor that offers robust overvoltage protection for a wide range of electronic circuits. Its high surge current and energy absorption capabilities make it an excellent choice for demanding applications.

Protect your valuable electronics with the VAR20-250 and ensure reliable operation in the face of voltage surges. Order yours today and safeguard your circuits from transient events!