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.

    251 Products showing for Gas Discharge Tubes

    Bourns
    2095
    2 Electrode Gas Discharge Tube
    8kA
    4000V
    5500V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    Bourns
    2036
    Surge Absorber
    20kA
    75V
    525V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    10kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    2095
    2 Electrode Gas Discharge Tube
    8kA
    4000V
    5500V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    75V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    90V
    550V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    350V
    810V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    A71-H10X
    2 Electrode Arrester
    15kA
    1000V
    1300V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    2kA
    75V
    750V
    -
    Axial
    2.8 (Dia.) x 3.5mm
    -
    -
    -
    3.5mm
    +90°C
    -40°C
    Bourns
    2057
    2 Electrode Gas Discharge Tube
    10kA
    75V
    800V
    -
    Axial
    5.5 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    12kA
    90V
    450 V, 550V
    90 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    150V
    620V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2057
    2 Electrode Gas Discharge Tube
    10kA
    75V
    800V
    -
    Axial
    5.5 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    Littelfuse
    SL11021A
    3 Electrode Arrester
    10kA
    250V
    500V
    -
    Radial
    8.1 (Dia.) x 10.1mm
    4.4mm
    -
    -
    10.1mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    470V
    990V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    A71-H45X
    2 Electrode Arrester
    15kA
    2500V
    5800V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    TDK
    EF470X
    2 Electrode Arrester
    -
    588V
    800V
    150 V
    Through Hole
    8 Dia. x 6mm
    -
    8mm
    8.2mm
    6mm
    +125°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    5kA
    300V
    450 V, 550V
    300 V dc
    Through Hole
    -
    -
    -
    6.7mm
    4.7mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    5kA
    230V
    500 V, 600V
    230 V
    Axial
    8 (Dia.) x 6.05mm
    -
    -
    -
    6.05mm
    +90°C
    -40°C
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