Gas Discharge Tubes - GDTs / Gas Plasma Arrestors

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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Peak Pulse Current	DC Sparkover	Number of Electrodes	Termination Style	Failsafe Protection Y/N	Diameter	Length	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.2KV CG31.2L Littelfuse 1: S/ 16.78 1,885In Stock	Mfr. Part # CG31.2L Mouser Part # 576-CG31.2L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.2KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,885In Stock	S/ 16.78 S/ 13.94 S/ 12.85 S/ 10.67 View S/ 9.85 S/ 8.49 S/ 7.79 S/ 7.51	Min.: 1 Mult.: 1	CG3		1.2 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 2.5KV CG32.5LTR Littelfuse 1: S/ 18.06 950In Stock	Mfr. Part # CG32.5LTR Mouser Part # 576-CG32.5LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 2.5KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	950In Stock	Cut Tape S/ 18.06 S/ 14.99 S/ 13.82 S/ 11.48 Reel S/ 8.72 View S/ 10.59 S/ 9.93 S/ 8.10 S/ 7.63	Min.: 1 Mult.: 1 : 500	CG3		2.5 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Reel, Cut Tape
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5.0KV Standard GP Nominal CG35.0LTR Littelfuse 1: S/ 19.93 1,902In Stock	Mfr. Part # CG35.0LTR Mouser Part # 576-CG35.0LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5.0KV Standard GP Nominal Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,902In Stock	Cut Tape S/ 19.93 S/ 16.66 S/ 15.38 S/ 12.77 Reel S/ 9.26 View S/ 11.76 S/ 10.59 S/ 8.68 S/ 8.14	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.5KV CG34.5LTR Littelfuse 1: S/ 17.67 1,554In Stock	Mfr. Part # CG34.5LTR Mouser Part # 576-CG34.5LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.5KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,554In Stock	Cut Tape S/ 17.67 S/ 14.67 S/ 13.55 S/ 11.25 Reel S/ 8.91 View S/ 10.35 S/ 9.77 S/ 8.49 S/ 7.94	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Standard HV Nominal CG32.7L Littelfuse 1: S/ 18.06 700In Stock	Mfr. Part # CG32.7L Mouser Part # 576-CG32.7L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Standard HV Nominal Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	700In Stock	S/ 18.06 S/ 15.03 S/ 13.86 S/ 11.48 View S/ 10.59 S/ 9.15 S/ 8.95 S/ 8.14	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 2.7KV GP Axial Leaded CG32.7LTR Littelfuse 1: S/ 17.67 1,000In Stock	Mfr. Part # CG32.7LTR Mouser Part # 576-CG32.7LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 2.7KV GP Axial Leaded Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,000In Stock	Cut Tape S/ 17.67 S/ 15.03 S/ 13.86 S/ 11.48 Reel S/ 8.72 View S/ 10.43 S/ 10.00 S/ 8.68 S/ 8.14	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.3KV CG31.3L Littelfuse 1: S/ 17.59 350In Stock	Mfr. Part # CG31.3L Mouser Part # 576-CG31.3L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.3KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	350In Stock	S/ 17.59 S/ 15.49 S/ 14.64 S/ 11.72 View S/ 10.35 S/ 8.95 S/ 7.79 S/ 7.51	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3.0KV Standard GP Nominal CG33.0 Littelfuse 1: S/ 19.00 114In Stock	Mfr. Part # CG33.0 Mouser Part # 576-CG33.0	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3.0KV Standard GP Nominal Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	114In Stock	S/ 19.00 S/ 16.74 S/ 13.58 S/ 11.60 View S/ 10.51 S/ 10.16 S/ 9.30 S/ 8.17 S/ 8.14	Min.: 1 Mult.: 1	CG3		3 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Bulk
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.0KV CG31.0 Littelfuse 1: S/ 18.37 410In Stock	Mfr. Part # CG31.0 Mouser Part # 576-CG31.0	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 1.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	410In Stock	S/ 18.37 S/ 17.05 S/ 16.43 S/ 12.77 View S/ 10.90 S/ 10.35 S/ 9.03 S/ 8.76	Min.: 1 Mult.: 1	CG3		1 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Bulk
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. 1.3KV SPECIAL LIMITS CG31.3L-01 Littelfuse 1: S/ 18.37 366In Stock	Mfr. Part # CG31.3L-01 Mouser Part # 576-CG31.3L-01	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. 1.3KV SPECIAL LIMITS Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	366In Stock	S/ 18.37 S/ 17.05 S/ 16.43 S/ 12.77 View S/ 10.90 S/ 10.35 S/ 8.99 S/ 8.33 S/ 7.79	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.5KV CG34.5L Littelfuse 1: S/ 18.06 6,299In Stock	Mfr. Part # CG34.5L Mouser Part # 576-CG34.5L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.5KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	6,299In Stock	S/ 18.06 S/ 15.03 S/ 13.86 S/ 11.48 View S/ 10.59 S/ 9.34	Min.: 1 Mult.: 1	CG3		4.5 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.5KV CG31.5LTR Littelfuse 1: S/ 17.75 837In Stock	Mfr. Part # CG31.5LTR Mouser Part # 576-CG31.5LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.5KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	837In Stock	Cut Tape S/ 17.75 S/ 15.73 S/ 14.48 S/ 12.03 View Reel S/ 8.76 S/ 10.94 S/ 9.96 S/ 8.76	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 2.5KV NOM CG32.5L Littelfuse 1: S/ 16.78 1,624In Stock 1,400Expected 2/8/2027	Mfr. Part # CG32.5L Mouser Part # 576-CG32.5L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 2.5KV NOM Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,624In Stock 1,400Expected 2/8/2027	S/ 16.78 S/ 13.94 S/ 12.85 S/ 10.67 View S/ 9.85 S/ 8.60	Min.: 1 Mult.: 1	CG3		2.5 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 3.0KV CG33.0LTR Littelfuse 1: S/ 17.83 1,842In Stock 1,500Expected 2/22/2027	Mfr. Part # CG33.0LTR Mouser Part # 576-CG33.0LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 3.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,842In Stock 1,500Expected 2/22/2027	Cut Tape S/ 17.83 S/ 14.99 S/ 13.82 S/ 11.48 View Reel S/ 8.76 S/ 10.59 S/ 9.93 S/ 8.76	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Standard HV CG33.3L Littelfuse 1: S/ 18.06 650In Stock	Mfr. Part # CG33.3L Mouser Part # 576-CG33.3L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Standard HV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	650In Stock	S/ 18.06 S/ 15.03 S/ 13.86 S/ 11.48 View S/ 10.59 S/ 9.77 S/ 9.34	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors S.A. STAN 3.3KV CG33.3LTR Littelfuse 1: S/ 18.80 1,063In Stock	Mfr. Part # CG33.3LTR Mouser Part # 576-CG33.3LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors S.A. STAN 3.3KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,063In Stock	Cut Tape S/ 18.80 S/ 15.73 S/ 14.48 S/ 12.03 View Reel S/ 8.76 S/ 11.05 S/ 9.96 S/ 8.76	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.0KV CG34.0LTR Littelfuse 1: S/ 18.45 1,192In Stock	Mfr. Part # CG34.0LTR Mouser Part # 576-CG34.0LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 4.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	1,192In Stock	Cut Tape S/ 18.45 S/ 15.34 S/ 14.13 S/ 11.76 View Reel S/ 9.58 S/ 10.82 S/ 10.24 S/ 9.58	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 5.0KV NOM CG35.0L Littelfuse 1: S/ 17.87 653In Stock 700Expected 2/2/2027	Mfr. Part # CG35.0L Mouser Part # 576-CG35.0L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 5.0KV NOM Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	653In Stock 700Expected 2/2/2027	S/ 17.87 S/ 15.03 S/ 13.74 S/ 11.48 View S/ 10.39 S/ 9.34	Min.: 1 Mult.: 1	CG3		5 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 7.5KV NOM CG37.5LD004 Littelfuse 1: S/ 19.15 620In Stock 700Expected 11/5/2026	Mfr. Part # CG37.5LD004 Mouser Part # 576-CG37.5LD004	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 7.5KV NOM Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	620In Stock 700Expected 11/5/2026	S/ 19.15 S/ 15.92 S/ 14.67 S/ 12.18 View S/ 11.25 S/ 9.69 S/ 9.34	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.0KV CG31.0L Littelfuse 1: S/ 16.78 345In Stock 350Expected 1/18/2027	Mfr. Part # CG31.0L Mouser Part # 576-CG31.0L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 1.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	345In Stock 350Expected 1/18/2027	S/ 16.78 S/ 13.94 S/ 12.85 S/ 10.67 View S/ 9.85 S/ 8.60	Min.: 1 Mult.: 1	CG3		1 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 1.5KV NOM CG31.5L Littelfuse 1: S/ 16.39 451In Stock 2,450On Order	Mfr. Part # CG31.5L Mouser Part # 576-CG31.5L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 1.5KV NOM Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	451In Stock 2,450On Order On Order Ship Dates Mfr. #: CG31.5L Stock: 451 Can Ship Immediately On Order: 1,050 Expected 12/24/2026 1,400 Expected 1/18/2027 Factory Lead-Time: 17 Weeks	S/ 16.39 S/ 14.01 S/ 12.46 S/ 10.47 View S/ 9.34 S/ 9.07 S/ 8.99 S/ 8.60	Min.: 1 Mult.: 1	CG3		1.5 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 2.0KV NOM CG32.0L Littelfuse 1: S/ 16.85 450In Stock 350Expected 2/17/2027	Mfr. Part # CG32.0L Mouser Part # 576-CG32.0L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 2.0KV NOM Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	450In Stock 350Expected 2/17/2027	S/ 16.85 S/ 14.75 S/ 13.62 S/ 11.29 View S/ 10.20 S/ 8.99 S/ 8.60	Min.: 1 Mult.: 1	CG3		2 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 2.0KV CG32.0LTR Littelfuse 1: S/ 17.01 489In Stock 2,000Expected 2/18/2027	Mfr. Part # CG32.0LTR Mouser Part # 576-CG32.0LTR	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 2.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	489In Stock 2,000Expected 2/18/2027	Cut Tape S/ 17.01 S/ 14.13 S/ 13.04 S/ 10.82 View Reel S/ 8.76 S/ 10.00 S/ 9.38 S/ 8.76	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
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.0KV CG34.0L Littelfuse 1: S/ 19.15 115In Stock 1,750On Order	Mfr. Part # CG34.0L Mouser Part # 576-CG34.0L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN. 4.0KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	115In Stock 1,750On Order On Order Ship Dates Mfr. #: CG34.0L Stock: 115 Can Ship Immediately On Order: 700 Expected 1/28/2027 350 Expected 2/4/2027 700 Expected 2/9/2027 Factory Lead-Time: 17 Weeks	S/ 19.15 S/ 15.92 S/ 14.67 S/ 12.18 View S/ 11.25 S/ 9.69 S/ 9.34	Min.: 1 Mult.: 1	CG3		4 kV	2 Electrode	Axial	Failsafe Not Protected	8 mm	6 mm	- 40 C	+ 90 C	Tray
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 6.5KV CG36.5LD004 Littelfuse 1: S/ 17.63 595In Stock	Mfr. Part # CG36.5LD004 Mouser Part # 576-CG36.5LD004	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 6.5KV Learn More about Littelfuse cg3 gas discharge tubes	Datasheet	595In Stock	S/ 17.63 S/ 15.03 S/ 13.86 S/ 11.48 View S/ 10.59 S/ 9.34	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

CG3 High-Voltage Gas Discharge Tubes

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