Characteristics and Interoperability Zinc oxide varistor (MOV): This device quickly blocks high voltage by starting up instantly and absorbing lightning voltage. It also regulates the voltage value that remains within the state range. The hidden problem of high current can be resolved by using a ceramic gas discharge tube (GDT) for effective isolation of strong current. This tube can effectively absorb excess current and connect it to the ground wire. elevated temperature fuse guard Cut off the extremely high temperature completely. Low melting point fusible metal is used to make the lightning protector's high temperature fuse protector. In order to protect household appliances, it will promptly fuse itself once the induced temperature reaches an unsafe level.