The UltraMOV® 25S Varistor Series is designed for applications requiring high peak surge current ratings and high energy absorption capability. UltraMOV® 25S varistors are primarily intended for use in AC Line Voltage applications such as Surge Protective Devices (SPD), Uninterruptable Power Supplies (UPS), AC Power Taps, AC Power Meters, or other products that require voltage clamping of high transient surge currents from sources such as lightning, inductive load switching, or capacitor bank switching.