Features: 1. When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, which is equivalent to a resistor with an infinite value. Equivalent to a switch that is off. 2. When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, which is equivalent to an infinitely small resistance, equivalent to a closed state switch. 3. Small body, easy to install and remove. 4. Adopted of high quality electronic components, and accuracy process, ensure for the durability 5. The varistor has good contact performance, ensure stable working Specification: Condition: 100% Brand new Item Type: Varistor Diameter: Approx. 10mm / 0.4in Voltage: 430V Package Size: Approx. 10 x 10 x 2cm / 3.9 x 3.9 x 0.8in Package List: 50 x Varistors1When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, which is equivalent to a resistor with an infinite value. Equivalent to a switch that is off. 2When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, which is equivalent to an infinitely small resistance, equivalent to a closed state switch. 3Small body, easy to install and remove. 4Adopted of high quality electronic components, and accuracy process, ensure for the durability 5The varistor has good contact performance, ensure stable working