CG3 High-Voltage Gas Discharge Tubes

Littelfuse CG3 High-Voltage Gas Discharge Tubes (GDTs) are two-electrode, 1kV to 7.5kV devices designed for surge protection and high-isolation applications. Littelfuse CG3 GDTs are also designed for applications for which bias voltages or signal levels of several hundred volts are normally present. CG3 offers a low capacitance of <1.5pF and 5kA peak pulse current while operating over a -40°C to +90°C operating temperature range.

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Description Datasheet Availability Pricing (PHP) 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 3.0KV Standard GP Nominal
Datasheet
635In Stock
Min.: 1
Mult.: 1

CG3 3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Bulk
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.2KV
Datasheet
1,987In Stock
Min.: 1
Mult.: 1

CG3 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 2.7KV GP Axial Leaded
Datasheet
1,000In Stock
Min.: 1
Mult.: 1
: 500

CG3 5 kA 2.7 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.0KV
Datasheet
3,705In Stock
Min.: 1
Mult.: 1
: 500

CG3 4 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.5KV
Datasheet
1,554In Stock
Min.: 1
Mult.: 1
: 500

CG3 4.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.0KV
Datasheet
410In Stock
Min.: 1
Mult.: 1

CG3 1 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Bulk
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. 1.3KV SPECIAL LIMITS
Datasheet
16In Stock
350Expected 22/09/2026
Min.: 1
Mult.: 1

CG3 5 kA 1.3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.3KV
Datasheet
350In Stock
Min.: 1
Mult.: 1

CG3 5 kA 1.3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.5KV
Datasheet
850In Stock
Min.: 1
Mult.: 1
: 500

CG3 1.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 2.0KV
Datasheet
888In Stock
500Expected 13/08/2026
Min.: 1
Mult.: 1
: 500

CG3 2 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 3.0KV
Datasheet
679In Stock
1,500Expected 20/08/2026
Min.: 1
Mult.: 1
: 500

CG3 3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors S.A. STAN 3.3KV
Datasheet
1,098In Stock
Min.: 1
Mult.: 1
: 500

CG3 5 kA 3.3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.5KV
Datasheet
3,961In Stock
2,450Expected 19/11/2026
Min.: 1
Mult.: 1

CG3 4.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 5.0KV NOM
Datasheet
1,042In Stock
Min.: 1
Mult.: 1

CG3 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 5.0KV Standard GP Nominal
Datasheet
1,912In Stock
Min.: 1
Mult.: 1
: 500

CG3 5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.0KV
Datasheet
74In Stock
1,000Expected 07/12/2026
Min.: 1
Mult.: 1
: 500

CG3 1 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Reel, Cut Tape
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.5KV
Datasheet
438In Stock
Min.: 1
Mult.: 1

CG3 1.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Bulk
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 1.5KV NOM
Datasheet
626In Stock
2,450Expected 03/12/2026
Min.: 1
Mult.: 1

CG3 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 STANDARD 2.0KV NOM
Datasheet
315In Stock
350Expected 15/10/2026
Min.: 1
Mult.: 1

CG3 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 STANDARD 2.5KV NOM
Datasheet
620In Stock
1,050Expected 08/10/2026
Min.: 1
Mult.: 1

CG3 2.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Standard HV Nominal
Datasheet
350In Stock
350Expected 17/08/2026
Min.: 1
Mult.: 1

CG3 5 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 Standard HV
Datasheet
321In Stock
350Expected 29/10/2026
Min.: 1
Mult.: 1

CG3 5 kA 3.3 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.0KV
Datasheet
580In Stock
Min.: 1
Mult.: 1

CG3 4 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 6.5KV
Datasheet
310In Stock
350Expected 17/08/2026
Min.: 1
Mult.: 1

CG3 5 kA 6.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Bulk
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 7.5KV NOM
Datasheet
859In Stock
700Expected 14/12/2026
Min.: 1
Mult.: 1

CG3 5 kA 7.5 kV 2 Electrode Axial Failsafe Not Protected 8 mm 6 mm - 40 C + 90 C Tray