SG Gas Discharge Tubes

Littelfuse SG Gas Discharge Tubes (GDT) offer high surge ratings in a miniature package and are designed for surface mounting on PCB with a small size of 4.5mm x 3.2mm x 2.7mm. The GDTs' low insertion loss is perfectly suited to broadband equipment applications. Their capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, where capacitance variation across Tip and Ring is undesirable. Littelfuse SG Gas Discharge Tubes are extremely robust and are able to divert a 1000A pulse without destruction.

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Description Datasheet Availability Pricing (GBP) 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
Length
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 315-525V 2A GDT T/R 2 Term
Datasheet
2,545In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 420 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 263-437V 2A GDT T/R 2 Term
Datasheet
1,995In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 350 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 172-288V 2A GDT T/R 2 Term
Datasheet
2,735In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 230 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 225-375V 2A GDT T/R 2 Term
Datasheet
6,135In Stock
8,000Expected 10/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 300 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 52-98V 2A GDT T/R 2 Term
Datasheet
8,055In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 2 kA 75 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 63-117V 2A GDT T/R 2 Term
Datasheet
4,398In Stock
6,000Expected 28/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 2 kA 90 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 300-500V 2A GDT T/R 2 Term
Datasheet
16In Stock
4,000Expected 20/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 400 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 263-437V GDT T/R 2 Term
Datasheet
22,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 1 kA 350 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 105-195V 2A GDT T/R 2 Term
Datasheet
1,982Expected 05/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

SG 2 kA 150 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel, Cut Tape, MouseReel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 210-390V GDT T/R 2 Term
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 2,000
Mult.: 2,000
: 2,000

SG 1 kA 300 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel
Littelfuse Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 315-525V GDT T/R 2 Term
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 2,000
Mult.: 2,000
: 2,000

SG 1 kA 420 V 2 Electrode SMD/SMT Failsafe Not Protected 4.5 mm - 40 C + 90 C Reel