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20D431 20mm 275V Varistor
It is 20mm 275V Varistor. Varistor, thermistor or Thermal resistance is a circuit element whose electrical resistance decreases as the temperature of the environment or the contact surface increases. Varistor resistance is a type of temperature controlled resistor.
- Varistor thermistors are placed in systems that do not want to overheat such as transformers and motors.
- The Varistor resistor is placed for level control in a water tank.
- When the Varistor resistor is connected in series with the motor, it first draws a small current and ensures safe starting of the motor.
- It is widely used in areas where heat balance is critical.
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