Gas Discharge Tubes

Littelfuse Gas Discharge Tubes (GDTs) are designed for high-voltage transient surge protection in small devices. Littelfuse GDTs are designed to dissipate large amounts of energy and are ideal for lightning surge protection. GDTs are widely applied to outdoor telecommunications equipment. These Littelfuse devices are available in leaded and surface-mount configurations.

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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Peak Pulse Current
DC Sparkover
Number of Electrodes
Termination Style
Failsafe Protection Y/N
Diameter
Length
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 2700V 2POLE AXIAL LEADS HV GDT
Datasheet
2,976In Stock
Min.: 1
Mult.: 1

GTCx28-R 3 kA 2.7 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 150V 2POLE CHIP TYPE SMT
Datasheet
4,190In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 150 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 75V 2.5KA 2POLE
Datasheet
3,245In Stock
3,000Expected 12/17/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

GTCx2-R 2.5 kA 75 V 2 Electrode SMD/SMT Failsafe Not Protected 5 mm 4.4 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 400V 3POLE SMT GDT
Datasheet
2,575In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

GTCx3-R 5 kA 400 V 3 Electrode SMD/SMT Failsafe Not Protected 5 mm 7.6 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 75V 3POLE SMT GDT
Datasheet
7,043In Stock
Min.: 1
Mult.: 1

GTCx3-R 5 kA 75 V 3 Electrode SMD/SMT Failsafe Not Protected 5 mm 7.6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 75V 3POLE SMT GDT
Datasheet
9,502In Stock
43,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1,000

GTCx3-R 5 kA 75 V 3 Electrode SMD/SMT Failsafe Not Protected 5 mm 7.6 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 140V 8mm 20KA 2POLE
Datasheet
49In Stock
Min.: 1
Mult.: 1

GTCx28-R 20 kA 140 V 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 600V 2POLE AXIAL LEADS GDT
Datasheet
129In Stock
Min.: 1
Mult.: 1

GTCx28-R 10 kA 600 V 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 400V 2POLE AXIAL LEADS GDT
Datasheet
190In Stock
Min.: 1
Mult.: 1

GTCx2-R 2.5 kA 400 V 2 Electrode Axial Failsafe Protected 5 mm 5 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 500V 2POLE AXIAL LEADS GDT
Datasheet
434In Stock
Min.: 1
Mult.: 1

GTCx2-R 2.5 kA 500 V 2 Electrode Axial Failsafe Protected 5 mm 5 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 75V 2POLE AXIAL LEADS GDT
Datasheet
387In Stock
Min.: 1
Mult.: 1

GTCx2-R 2.5 kA 75 V 2 Electrode Axial Failsafe Protected 5 mm 5 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 350V 2POLE AXIAL LEADS GDT
Datasheet
668In Stock
Min.: 1
Mult.: 1

GTCx2-R 5 kA 350 V 2 Electrode Axial Failsafe Not Protected 6 mm 4.2 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 1200V 2POLE AXIAL LEAD HV GDT
Datasheet
333In Stock
Min.: 1
Mult.: 1

GTCx28-R 3 kA 1.2 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 1500V 2POLE AXIAL LEAD HV GDT
Datasheet
97In Stock
1,000Expected 9/24/2026
Min.: 1
Mult.: 1

GTCx28-R 3 kA 1.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 470V 2POLE AXIAL LEADS GDT
Datasheet
726In Stock
Min.: 1
Mult.: 1

GTCx28-R 10 kA 470 V 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 800V 2POLE AXIAL LEADS HV GDT
Datasheet
121In Stock
Min.: 1
Mult.: 1

GTCx28-R 5 kA 800 V 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 75V 3POLE AXIAL LEADS GDT
Datasheet
544In Stock
Min.: 1
Mult.: 1

GTCx3-R 5 kA 75 V 3 Electrode Axial Failsafe Not Protected 5 mm 7.6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 140V 2POLE CHIP TYPE SMT
Datasheet
1,891In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 140 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 300V 1KA 20% 2-POLE SMD
Datasheet
917In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 300 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 400V 2POLE CHIP TYPE SMT
Datasheet
1,487In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 400 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 500V 2POLE 4.5mm L
Datasheet
2,094In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 500 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 75V 1KA 20% 2-POLE SMD
Datasheet
1,468In Stock
2,000Expected 11/20/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 75 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 90V 2POLE CHIP TYPE SMT
Datasheet
590In Stock
14,000Expected 12/21/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 90 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 7MM 90V 3POLE RADIAL LEADS GDT
Datasheet
372In Stock
Min.: 1
Mult.: 1

GTCx3-R 10 kA 90 V 3 Electrode Radial Failsafe Not Protected 7.5 mm 11.5 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 350V 2POLE CHIP TYPE SMT
Datasheet
10In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

GTCx2-R 1 kA 350 V 2 Electrode SMD/SMT Failsafe Not Protected 3 mm 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel