How To Select Gas Discharge Tube?
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How To Select Gas Discharge Tube?

Views: 0     Author: Site Editor     Publish Time: 2021-01-06      Origin: Site

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• DC spark-over voltage: It is defined as the breakdown voltage measured with a rising voltage of 100V / S or 1000V / S, which is called the DC breakdown voltage, and generally falls within the range of ± 20% of the nominal DC breakdown voltage;

• Impulse spark-over voltage: It is defined as the breakdown voltage measured with a rising voltage of 100V / uS or 1000V / uS called the pulse breakdown voltage;

• Nominal impulse discharge current: It is defined as the nominal impulse discharge current refers to the 8 / 20μs lightning strike current that the discharge tube can withstand;

• AC discharge current: refers to the 50HZ mains power frequency AC current capability that the discharge tube can withstand;

• Insulation resistance: a certain voltage is applied to the two ends of the discharge tube, and the insulation resistance is measured;

• Capacitance: It refers to the selection of the parasitic capacitance value of the two ends of the discharge tube. The voltage of the ceramic gas discharge tube;

• DC spark-over voltage: The DC breakdown voltage must be greater than the maximum working voltage of the circuit being protected. Due to the high pulse breakdown voltage of the ceramic gas discharge tube, a two-level lightning protection concept should be considered when selecting and designing. Avoid high residual voltage and damage to the protected circuit IC. Selection of ceramic gas discharge tube flux;

• It is generally selected according to the requirements of the lightning protection test level of the customer's product to determine the flow capacity and corresponding size specifications of the selected discharge tube.


For more information about gas discharge tube, please click here!


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