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GDT gas discharge tube

Home > GDT gas discharge tube

GDT gas discharge tube

Information of GDT The Gas Discharge Tube, referred as GDT, GDT’s have two parallel electrodes in a low pressure inert gas cavity made of glass or ceramic. These devices are “DC” voltage rated at a rise time of 500 Volts per second. The spacing and size of electrodes determines the voltage and current ratings respectively. The GDT's I_PP rated at 1kA to 250kA@8/20µs. It has high insulation resistance, no leakage current, no aging failure, bidirectional protection, capacitance is extremely low, the breakdown voltage greater dispersion. These devices are largely used in the telecom sector for protecting subscriber stations and central office exchanges from primary lightning strikes. The selection tips of GDT 1. The DC spark-over voltage of GDT should be more than 30% standard voltage and “high-end” tolerance, that protect the Max DC, continuous working voltage and circuits. 2.The I_PP of GDT should be more than the surge current of transient circuit.

Information of GDT
The Gas Discharge Tube, referred as GDT, GDT’s have two parallel electrodes in a low pressure inert gas cavity made of glass or ceramic. These devices are “DC” voltage rated at a rise time of 500 Volts per second. The spacing and size of electrodes determines the voltage and current ratings respectively. The GDT's I_PP rated at 1kA to 250kA@8/20µs. It has high insulation resistance, no leakage current, no aging failure, bidirectional protection, capacitance is extremely low, the breakdown voltage greater dispersion. These devices are largely used in the telecom sector for protecting subscriber stations and central office exchanges from primary lightning strikes.

The selection tips of GDT

1. The DC spark-over voltage of GDT should be more than 30% standard voltage and “high-end” tolerance, that protect the Max DC, continuous working voltage and circuits.

2.The I_PP of GDT should be more than the surge current of transient circuit.

Part Number	DC Spark-over Voltage @100V/S(V) All 1000V±20% 1000±20 1000±20% 1200±20% 140±30% 1500±20% 150V±20% 150±20 150±20% 150±30% 1600±20% 2000±20% 200V±20% 200±20% 230V±20% 230±20 230±20% 2500±20% 250±20% 2700±20% 3000±20% 300V±20% 300±20 300±20% 3500±20% 350V±20% 350±20 350±20% 3600±20% 400V±20% 400±20 400±20% 420±20% 470V±20% 470±20 470±20% 50 500±20% 600V±20% 600±20 600±20% 75V±20% 75±20% 75±30 75±30% 800V±20% 800±20 800±20% 90V±20% 90V±30% 90±20% 90±30 90±30% Filter Reset	Max Impulse Spark-over Voltage @1KV/μs(V) All 600 700 750 900 950 1000 1100 1300 1500 1900 5000 <1000 <1100 <1200 <1300 <1400 <1500 <1600 <1800 <2000 <2400 <2600 <3000 <3500 <3600 <4000 <4500 <4600 <500 <600 <650 <700 <750 <800 <850 <900 <950 Filter Reset	Max Surge Discharge Current @8/20μs 10times (KA） All 0.5 2 3 5 10 20 Filter Reset	Insulation Resistance @DC100V (GΩ) All 0.1 1 >1 Filter Reset	Normal Alternating Discharge Current @50Hz (A) All 1 2 3 5 10 20 Filter Reset	Max Capacitance (1MHz) (pF) All 0.5 1 1.5 2 Filter Reset	Package All *3.21.61.6* 3R-8 *4.53.22.7* *57.6 5.56* 5.5x6_2R-5 5x5x4.2 *68.5 6.24* *86 8.010* Filter Reset
2R470TD-8	470±20%	<1200	20	1	20	1.5	8*6
2R600TD-8	600±20%	<1300	20	1	20	1.5	8*6
2R800TD-8	800±20%	<1500	20	1	20	1.5	8*6
3R075TA-5	75±30%	<600	5	1	5	1	5*7.6
3R90TA-5	90±30%	<600	5	1	5	1	5*7.6
3R150TA-5	150±20%	<650	5	1	5	1	5*7.6
3R075TB-8	75±20%	<750	10	1	10	2	8.0*10
3R090TB-8	90±20%	<750	10	1	10	2	8.0*10
3R150TB-8	150±20%	<800	10	1	10	2	8.0*10
3R230TB-8	230±20%	<800	10	1	10	2	8.0*10
3R300TB-8	300±20%	<800	10	1	10	2	8.0*10
3R350TB-8	350±20%	<800	10	1	10	2	8.0*10
3R400TB-8	400±20%	<850	10	1	10	2	8.0*10
3R420TB-8	420±20%	<850	10	1	10	2	8.0*10
3R470TB-8	470±20%	<950	10	1	10	2	8.0*10
3R600TB-8	600±20%	<1300	10	1	10	2	8.0*10
3R075TD-8	75±20%	<750	20	1	20	2	8.0*10
3R090TD-8	90±20%	<750	20	1	20	2	8.0*10
3R150TD-8	150±20%	<800	20	1	20	2	8.0*10
3R230TD-8	230±20%	<800	20	1	20	2	8.0*10
3R300TD-8	300±20%	<800	20	1	20	2	8.0*10
3R350TD-8	350±20%	<800	20	1	20	2	8.0*10
3R400TD-8	400±20%	<850	20	1	20	2	8.0*10
3R420TD-8	420±20%	<850	20	1	20	2	8.0*10
3R470TD-8	470±20%	<950	20	1	20	2	8.0*10
3R600TD-8	600±20%	<1300	20	1	20	2	8.0*10
SMD3216-075N	75±30%	<500	0.5	0.1	1	1	3.21.61.6
SMD3216-090N	90±30%	<500	0.5	0.1	1	1	3.21.61.6
SMD3216-140N	140±30%	<600	0.5	0.1	1	1	3.21.61.6
SMD3216-150N	150±30%	<600	0.5	0.1	1	1	3.21.61.6

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