1. When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, equivalent to an infinite resistance. This is like a switch being off. 2. When the voltage applied to the varistor exceeds its threshold, the current flowing through it increases, equivalent to an infinitely small resistance, like a switch in the closed position. 3. Small body, easy to install and remove. 4. Made of high-quality electronic components and meticulous process, ensuring durability. 5. The varistor has good contact performance, ensuring stable operation. Features: 1. When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, equivalent to an infinite resistance. This is like a switch being off. 2. When the voltage applied to the varistor exceeds its threshold, the current flowing through it increases, equivalent to an infinitely small resistance, like a switch in the closed position. 3. Small body, easy to install and remove. 4. Made of high-quality electronic components and meticulous process, ensuring durability. 5. The varistor has good contact performance, ensuring stable operation. Specification: Item Type: Varistor Diameter: Approx. 10 mm / 0.4 in Voltage: 470 V Package Size: Approx. 10 x 10 x 2 cm / 3.9 x 3.9 x 0.8 in Package List: 50 x Varistors