The basic parameters of varistor

1. Nominal varistor voltage (V): refers to the voltage through the specified duration of the pulse current (usually 1mA duration is generally less than 400mS) voltage across the varistor voltage. In the case of
2. Voltage ratio: refers to the varistor current is 1mA when the voltage and the varistor current is 0.1mA when the ratio of the voltage value. In the case of
3. Maximum voltage (V): The maximum pulse peak current Ip and the peak voltage across the varistor at the specified voltage. In the case of
4. Residual pressure ratio: When the current through the varistor is a certain value, the voltage generated at both ends is called the residual voltage of this current value. The residual voltage ratio is the ratio of residual voltage to nominal voltage. In the case of
5. Flow capacity (kA): flow capacity, also known as flow through the specified conditions (the specified time interval and the number of times, the application of the standard impact current), allowing the maximum voltage through the varistor (peak) current values. In the case of
6. Leakage current (mA): leakage current, also known as waiting current, refers to the varistor at the specified temperature and maximum DC voltage, through the varistor current. In the case of
7. Voltage temperature coefficient: refers to the specified temperature range (temperature 20 ℃ ~ 70 ℃), the varistor nominal voltage rate of change, that is, through the varistor current constant, the temperature changes 1 ℃ , The relative change in the voltage across the varistor. In the case of
8. Current temperature coefficient: refers to the voltage across the varistor constant voltage, the temperature changes 1 ℃, the relative changes in the current through the varistor. In the case of
9. Voltage non-linear coefficient: refers to the varistor under a given applied voltage, the static resistance value and the dynamic resistance ratio. In the case of
10. Insulation resistance: refers to the varistor lead (pin) and the resistance between the resistance of the resistance of the surface. In the case of
11. Static Capacitance (PF): refers to the inherent capacitance of the varistor itself. In the case of
12. Rated power: at a specific ambient temperature of 85 ℃ for 1000 hours, so that the varistor voltage changes less than 10% of the maximum power. In the case of
13. Maximum Inrush Current (8 / 20us): Impresses the varistor with a specific pulse current (8 / 20us waveform) one or two times (5 minutes each time) so that the change in varistor voltage is still within 10% Of the maximum impact current.