250VAC - 390VDC 20mm Varistor - 20D391K is a robust and reliable component designed to protect electronic devices from voltage spikes and surges. This Varistor is engineered to handle a wide voltage range, making it an essential part of any circuit protection strategy. With a diameter of 20mm, it provides a compact yet powerful solution for safeguarding sensitive components. Whether you are working with AC or DC systems, this 250VAC and 390VDC rated varistor ensures your devices are shielded from transient voltages, enhancing the longevity and reliability of your electronics.