Gas discharge tubes dissipate voltage transients through a contained plasma gas. Thanks to high insulation resistance, low capacitance and leakage, they do not disturb the regular operativity of the equipment.
Their fast response to transient over-voltage events, and ability to dissipate large amounts of energy, translates into reduced risk of equipment damage.
Within the Gas Discharge Tube, we have different type of solutions: diodes series, three pin SMT series, dip type series, high surge absorption series.
- DC Breakdown Voltage(VBR)@100V/s(V): 90 - 3600 V
- Impulse Discharge Current@8/20μs(KA): 0.5 - 40 KA
- Impulse Spark-over Voltage@1KV/μs(V): up to 6000 V
How to select the proper GDT
- DC breakdown voltage: should be higher than the peak working voltage of the protective circuit
- Impulse spark over voltage: should be lower than the max voltage of the post stage protective circuit allowed
- Arc voltage: should be higher than the peak of the supply voltage
- Discharge current capability: should be higher than the max current circuit allowed
