Gas Discharge Tubes | GDT Surge Protection | RS
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    Gas Discharge Tubes

    Gas discharge tubes (GDT) are sealed glass tubes containing a pair of electrodes and filled with a gas that only conducts when a high voltage is applied across the electrodes. When a voltage spike appears across the device the gas is ionised (becomes a conducting gas plasma) which short-circuits the spike energy away. Gas discharge tubes are often used to protect sensitive circuit inputs from potentially damaging interference voltage transients. The large amount of energy that can be dispersed by gas discharge tubes makes them a good choice for lightning surge protection, particularly for telecommunications equipment.

    Why use a gas discharge tube?

    Most commonly used as a surge protection aid, gas discharge tubes are key in limiting surges in voltage across both electronic and electrical circuits. GDTs are great at handling high current feeds whilst also maintaining low capacitance and having excellent insulation resistance.

    247 Products showing for Gas Discharge Tubes

    Bourns
    2057
    2 Electrode Gas Discharge Tube
    10kA
    75V
    800V
    -
    Axial
    5.5 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    470V
    990V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    75V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    12kA
    350V
    650 V, 800V
    350 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2027
    2 Electrode Gas Discharge Tube
    25kA
    230V
    450 V, 675V
    -
    Through Hole
    7.5 (Dia.) x 6.42mm
    -
    -
    -
    9.5mm
    +155°C
    -55°C
    Bourns
    2087
    2 Electrode Gas Discharge Tube
    3kA
    800V
    1400V
    -
    Surface Mount
    4 x 4 x 4mm
    -
    4mm
    4mm
    4mm
    +85°C
    -30°C
    Littelfuse
    SL1011B
    2 Electrode Arrester
    12kA
    300V
    600V
    -
    Axial
    8 (Dia.) x 6.05mm
    -
    -
    -
    6.05mm
    +90°C
    -40°C
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