Smart MOV Electronics 10D471K 10D-471K 10D391K 07D220K 14D391K Varistor

Smart Electronics~Varistors 10D471K 10D-471K Varistors 10D391K 07D220K 14D391K

DATASHEET:  10D Series_v2306.1.pdf

Description:

The 10D series radial leaded varistors provides an ideal circuit protection solution for lower DC voltage applications by offering higher surge ratings than ever before available in such small discs.
The maximum peak surge current rating can reach up to 3.5KA (8/20 μs pulse) to protect against high peak surges, including indirect lightning strike interference, system switching transients and abnormal fast transients from the power source.

The basic parameters of the varistor are mainly composed of the following 12 items:

1. Nominal varistor voltage (V): refers to the voltage value across the varistor when a pulse current of specified duration (generally 1mA and duration less than 400mS) passes through.
2. Voltage ratio: refers to the ratio of the voltage value generated when the current of the varistor is 1mA to the voltage value generated when the current of the varistor is 0.1mA.
3. Maximum limit voltage (V): The peak value of the voltage at both ends of the varistor under the maximum pulse peak current Ip that the varistor can withstand and the specified waveform.
4. Residual voltage ratio: When the current passing through the varistor is a certain value, the voltage generated at both ends of it is called the residual voltage of this current value. The residual voltage ratio is the ratio of the residual voltage to the nominal voltage.
5. Flow capacity (kA): Flow capacity, also called flow rate, refers to the maximum pulse ( peak) current value.
6. Leakage current (mA): Leakage current, also called waiting current, refers to the current flowing through the varistor under the specified temperature and maximum DC voltage.
7. Voltage temperature coefficient: refers to the rate of change of the nominal voltage of the varistor within the specified temperature range (temperature is 20℃~70℃), that is, when the current through the varistor remains constant, 8. Current Temperature coefficient: refers to the relative change in the current flowing through the varistor when the temperature changes by 1°C when the voltage across the varistor remains constant.
8. Voltage nonlinear coefficient: refers to the ratio of the static resistance value to the dynamic resistance value of the varistor under a given external voltage.
9. Insulation resistance: refers to the resistance value between the lead wire (pin) of the varistor and the insulating surface of the resistor.
10. Static capacitance (PF): refers to the inherent capacitance of the varistor itself.
11. Rated power: The maximum power when the varistor voltage changes less than 10% after working for 1000 hours at a specific ambient temperature of 85°C.
12. Maximum impulse current (8/20us): Impact the varistor with a specific pulse current (8/20us waveform) once or twice (with an interval of 5 minutes each time), so that the change in the varistor voltage is still within 10% the maximum inrush current.

Applications: