The EZJ-Z0V420WA is a Varistor manufactured by Panasonic. It is a two-terminal, non-polarized electromechanical component that is designed to limit surges or voltage spikes in circuits. It can be used to protect sensitive equipment from these sudden power surges or spikes. The VARISTOR has a rated voltage of 42V and a rated current of 10A, along with a capacitance of 56pF. It is typically used in applications involving home appliances and consumer electronics.