The LST Varistor Series is constructed with Littelfuse’s renowned thermally protected varistor technology (TMOV). The built-in thermal disconnecting function and electric arc shield provides additional protection to prevent catastrophic failure and fire hazard even under the extreme circumstances of varistor end-of-life or abnormal overvoltage conditions. It is specifically designed for Type 1 and Type 2 Surge Protective Devices (SPDs).
A reed relay combines a reed switch with a coil into one package to serve as a smaller, more power-efficient alternative to other types of relays. These relays are well suited for use in automated test equipment, security, medical, and process control equipment. Options for customization are available.
SPDs need to be sized correctly. If they are sized too low, the system could be susceptible to temporary overvoltages. It can also decrease the SPD life expectancy. If they are sized too high, it could be damaging to equipment.