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 (SGD) 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
645In 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
2,005In 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 GP S.A. STAN 4.0KV
Datasheet
3,905In 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 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 1.0KV
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 14/10/2026
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 4.0KV
Datasheet
1,200In Stock
Min.: 1
Mult.: 1

CG3 4 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. 1.0KV
Datasheet
874In Stock
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 STANDARD 1.5KV NOM
Datasheet
1,132In Stock
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 S.A. STAN 3.3KV
Datasheet
1,174In 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. 4.0KV
Datasheet
1,445In 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. 4.5KV
Datasheet
961In Stock
5,950On Order
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 GP S.A. STAN 4.5KV
Datasheet
1,560In 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 STANDARD 5.0KV NOM
Datasheet
1,167In 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
2,062In 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 7.5KV NOM
Datasheet
515In Stock
700Expected 16/9/2026
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
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.0KV
Datasheet
378In Stock
Min.: 1
Mult.: 1

CG3 1 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
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 GP S.A. STAN. 1.5KV
Datasheet
408In Stock
500Expected 1/7/2026
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 STANDARD 2.0KV NOM
Datasheet
325In Stock
350Expected 3/11/2026
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 GP S.A. STAN. 2.0KV
Datasheet
397In Stock
1,000Expected 24/8/2026
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 STANDARD 2.5KV NOM
Datasheet
255In Stock
2,100On Order
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 3.0KV NOM
Datasheet
285In Stock
350Expected 30/11/2026
Min.: 1
Mult.: 1

CG3 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 3.0KV
Datasheet
184In Stock
2,500On Order
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 Standard HV
Datasheet
121In Stock
700On Order
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