Gas Discharge Tube

Gas Discharge Tube (GDT) is made up of a spark gap enveloped in a sealed ceramic or glass tube that is filled with inert gas.

Under the normal condition, the operation voltage does not reach the spark-over voltage and GDT keeps its high resistance status.

However, when the over-voltage reaches GDT's spark-over voltage, high energy brought by over-voltage will cause the fill-in gas start to discharge and the internal insulation gap start to breakdown.

At this moment, GDT becomes short circuit very fast, which will lead the surge current into the ground and protect the equipment safely.

As soon as the over-voltage disappears, the GDT returns to high insulation status and waiting for the next action.

Gas discharge tube GF32R

Size: 4.5 x 3.2 x2.7mm

DC spark-over voltage:

75...600V

Max. impulse discharge current:

2kA (10 times)

Gas discharge tube GD82R

Size: 8 x T 6mm

DC spark-over voltage:

70...800V

Max. impulse discharge current (1 time):

70...470V / 15kA

600...800V / 10kA

Gas discharge tube GC82R (High Voltage)

Size: 8 x T 6 / T 8mm

DC spark-over voltage:

600...6000V

Max. impulse discharge current (1 time):

600...2500V / 8kA

2700...6000V / 5kA

Gas discharge tube GF62R

Size: 6.2 x T 4.2mm

DC spark-over voltage:

75...3000V

Max. impulse discharge current (1 time):

75...800V / 5kA 800...2000V / 3kA

Gas discharge tube GS22R

Size: 3.2 x1.6 x 1.6mm

DC spark-over voltage:

150...600V

Max. impulse discharge current:

0.5kA (10 times)

Gas discharge tube GF42R

Size: 4.2/3.5 x T 4mm

DC spark-over voltage:

75...2000V

Max. impulse discharge current (1 time):

75...600V / 5kA 800...2000V / 3kA

Gas discharge tube GD52R

Size: 5.5 x T 6mm

DC spark-over voltage:

70...3600V

Max. impulse discharge current (1 time):

70...470V / 10kA

600...800V / 5kA

1000...3600V / 3kA

Gas discharge tube GD82R-U (High Surge)

Size: 8 x T 6mm

DC spark-over voltage:

70...600V

Max. impulse discharge current (1 time):

25kA

Gas discharge tube G12D8A

Size: 11.8 x T 8mm

DC spark-over voltage:

230...800V

Max. impulse discharge current (1 time):

20kA (10 times)

40kA

Gas discharge tube GC63R

Size: 6 x T 8mm

DC spark-over voltage:

90...600V

Max. impulse discharge current (1 time):

350...600V / 5kA (10 times)

90...145V / 5kA

200...250V / 10kA

Gas discharge tube GQF3R

Size: 5 x T 7.2mm

DC spark-over voltage:

75...800V

Max. impulse discharge current (1 time):

75...150V / 10kA

200...470V / 15kA

600...800V / 10kA

Gas discharge tube G12D12

Size: 11.8 x T 12mm

DC spark-over voltage:

230...800V

Max. impulse discharge current (1 time):

30kA (10 times)

40kA

Gas discharge tube G12D17

Size: 11.8 x T 17mm

DC spark-over voltage:

230...800V

Max. impulse discharge current (1 time):

40kA (10 times)

80kA

Gas discharge tube G12D18

Size: 11.8 x T 18mm

DC spark-over voltage:

230...800V

Max. impulse discharge current (1 time):

40kA (10 times)

80kA

Gas discharge tube G16D5A

Size: 15.5 x T 5mm

DC spark-over voltage:

500...800V

Max. impulse discharge current (1 time):

20kA (10 times)

40kA

Gas discharge tube G20D5F

Size: 20 x T 5.5mm

DC spark-over voltage:

150...1000V

Max. impulse discharge current (1 time):

40kA (10 times)

60kA

Gas discharge tube G25D10

Size: 25 x T 10mm

DC spark-over voltage:

500...800V

Max. impulse discharge current (1 time):

60kA (10 times)

80kA

Gas discharge tube G25D10-H

Size: 25 x T 5.5mm

DC spark-over voltage:

150...1000V

Max. impulse discharge current (1 time):

40kA (10 times)

60kA

Gas discharge tube G25D21

Size: 25 x T 21mm

DC spark-over voltage:

500...800V

Max. impulse discharge current (1 time):

80kA (10 times)

160kA

Gas discharge tube G30D12

Size: 30 x T 12mm

DC spark-over voltage:

500...800V

Max. impulse discharge current (1 time):

100kA (10 times)

160kA

Gas discharge tube GB83R

Size: 8 x T 10mm

DC spark-over voltage:

75...600V

Max. impulse discharge current:

20kA (10 times)