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

    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    350V
    750 V, 800V
    350 V dc
    Through Hole
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    600V
    1200V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    20kA
    90V
    450 V, 550V
    90 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Littelfuse
    CG3
    2 Electrode Arrester
    10kA
    1800V
    1800 V, 2000V
    230 Vrms
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    250V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    10kA
    230V
    600V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    5kA
    90V
    450 V, 550V
    90 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2056
    3 Electrode Gas Discharge Tube
    5kA
    600V
    1000V
    -
    Radial
    6.3 (Dia.) x 8.5mm
    4.4mm
    -
    -
    8.5mm
    +85°C
    -30°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    470V
    990V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    TDK
    A80-A600X
    2 Electrode Arrester
    -
    600V
    1400V
    60 V
    Socket Mount
    8 Dia. x 6.1mm
    -
    8mm
    8.5mm
    6.1mm
    +90°C
    -40°C
    EPCOS
    EHV
    3 Electrode Arrester
    15kA
    90V
    300 V, 350V
    90 V dc
    Through Hole
    -
    -
    -
    10.5mm
    13.4mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    12kA
    350V
    650 V, 800V
    350 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Littelfuse
    SL1011A
    2 Electrode Arrester
    1kA
    276V
    550V
    -
    Axial
    8 (Dia.) x 6.05mm
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Littelfuse
    CG2
    2 Electrode Arrester
    2.5kA
    690V
    1000 V, 1400V
    -
    Axial
    8.1 (Dia.) x 6.07mm
    -
    -
    -
    6.07mm
    +90°C
    -40°C
    Bourns
    GDT25
    Surge Arrester
    10kA
    470V
    860V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Littelfuse
    CG2
    2 Electrode Gas Discharge Tube
    500A
    800V
    400 V, 650V
    160 V
    Axial
    8.1 (Dia.) x 6.07mm
    -
    -
    8.1mm
    6.07mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    12kA
    600V
    1100 V, 950V
    600 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Littelfuse
    AC
    2 Electrode Arrester
    10kA
    600V
    1100 V, 1200V
    240 V ac
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    Bourns
    2061
    2 Electrode Gas Discharge Tube
    60kA
    800V
    1500V
    -
    Surface Mount
    11.8 (Dia.) x 12mm
    -
    -
    -
    12mm
    +85°C
    -30°C
    Bourns
    2031
    2 Electrode Arrester
    1kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
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