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
    GDT25
    Surge Arrester
    10kA
    420V
    820V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    25kA
    600V
    950 V, 1100V
    600 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2051
    2 Electrode Arrester
    2kA
    200V
    500 V, 650V
    200 V
    Surface Mount
    4.5 x 3.2 x 2.7mm
    -
    3.2mm
    2.7mm
    4.5mm
    +90°C
    -40°C
    Littelfuse
    GTCX28-XXXM-R10
    -
    5kA
    420V
    1000 V, 900V
    600 V
    Through Hole
    6 x 8 x 8mm
    -
    8mm
    8mm
    6mm
    +90°C
    -40°C
    Bourns
    2049
    2 Electrode Gas Discharge Tube
    20kA
    250V
    700V
    -
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +85°C
    -30°C
    EPCOS
    A71-H14X
    2 Electrode Arrester
    15kA
    1400V
    2100V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Bourns
    SA
    2 Electrode Gas Discharge Tube
    5kA
    6300V
    9200V
    6300 V
    Axial
    8.5 (Dia.) x 8.9mm
    -
    -
    -
    8.9mm
    +125°C
    -40°C
    Bourns
    2095
    2 Electrode Gas Discharge Tube
    8kA
    4000V
    5500V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    230V
    700V
    -
    Surface Mount
    8 (Dia.) x 10mm
    -
    -
    -
    10mm
    +85°C
    -30°C
    Bourns
    SM
    3 Electrode Gas Discharge Tube
    4kA
    185V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    400V
    900V
    -
    Surface Mount
    8 (Dia.) x 10mm
    -
    -
    -
    10mm
    +85°C
    -30°C
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    230V
    500 V, 600V
    230 V dc
    Through Hole
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
    MITSUBISHI MATERIALS
    DSA
    Surge Absorber
    2kA
    2400V
    -
    2880 V
    Through Hole
    6 (Dia.) x 21mm
    -
    6mm
    6mm
    21mm
    +125°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    2kA
    75V
    750V
    -
    Axial
    2.8 (Dia.) x 3.5mm
    -
    -
    -
    3.5mm
    +90°C
    -40°C
    Bourns
    2045
    2 Electrode Gas Discharge Tube
    15kA
    400V
    1000V
    -
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +85°C
    -30°C
    Bourns
    2053
    2 Electrode Gas Discharge Tube
    5kA
    250V
    700V
    -
    Surface Mount
    4.2 x 4.2 x 4mm
    -
    4.2mm
    4mm
    4.2mm
    +85°C
    -30°C
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    230V
    700V
    -
    Surface Mount
    8 (Dia.) x 10mm
    -
    -
    -
    10mm
    +85°C
    -30°C
    Littelfuse
    SL10021A
    3 Electrode Arrester
    10kA
    310V
    550V
    -
    Radial
    8.1 (Dia.) x 10.1mm
    4.4mm
    -
    -
    10.1mm
    +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
    EPCOS
    EHV
    2 Electrode Arrester
    20kA
    230V
    450 V, 550V
    230 V dc
    Surface Mount
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
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