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Gas Discharge Tubes

Reduce the risk of damage from short-lived and unpredictable voltage surges by installing durable gas discharge tubes (GDTs). The plasma-filled overvoltage protection devices absorb large amounts of current and redirect it to ground without producing frequencies that could incapacitate nearby components. These characteristics make GDTs essential surge protective devices for outdoor telecom equipment prone to lightning strikes. Littelfuse offers a broad selection of leaded and surface mounted GDTs for many applications. Each boasts a minimal footprint and low weight, and our squared GDT is among the smallest available.

Subcategories under Gas Discharge Tubes

Gas Plasma Switches

Gas plasma switches outperform solid state switches in ignition systems such as those for HID headlights that burn xenon. The specially designed gas

High Voltage

High voltage gas discharge tubes (GDT) provide overvoltage protection to components and circuits in electronic equipment. The GDTs contain plasma and

Low-to-Medium Surge

Low-to-medium surge gas discharge tubes (GDTs) also go by the name plasma surge protective devices. Developed to provide lightning protection to

Medium-to-High Surge

Medium-to-high surge gas discharge tubes (GDTs) also go by the name plasma surge protective devices. Developed to provide lightning protection to

Squared

Squared gas discharge tubes (GDTs) mount on printed circuit boards to provide overvoltage protection to board components, circuits, and electrical

Very High Surge

Very high surge GDTs provide overvoltage protection to sensitive electronic components. Littelfuse makes two versions of these specialized gas

Gas Discharge Tubes Parts

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Gas Discharge Tubes Information Center

Gas discharge tubes dissipate voltage transients through a contained plasma gas. They have high insulation resistance plus low capacitance and leakage to ensure minimal effect on normal operation of equipment.

Littelfuse devices offer a small footprint and are available in leaded and surface mount configurations, with high surge handling capability. We offer both low surge GDTs and medium surge GDTs. Their fast response to transient over-voltage events, and ability to dissipate large amounts of energy, translates into reduced risk of equipment damage. The amount of energy dispersed by gas discharge tubes makes them a good choice for lightning surge protection, particularly for telecomm equipment located in outdoor structures.