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
    230V
    600V
    -
    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
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    300V
    875V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2049
    2 Electrode Gas Discharge Tube
    20kA
    90V
    600V
    -
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +85°C
    -30°C
    Huber+Suhner
    -
    -
    -
    230V
    -
    675 V
    Panel Mount
    -
    -
    8mm
    -
    8mm
    +85°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    75V
    700V
    -
    Axial
    8 (Dia.) x 6.05mm
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    75V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Littelfuse
    SL1011A
    2 Electrode Arrester
    1kA
    420V
    800 V, 900V
    -
    Axial
    8 (Dia.) x 6.05mm
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2049
    2 Electrode Gas Discharge Tube
    20kA
    90V
    600V
    -
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +85°C
    -30°C
    Littelfuse
    CG
    2 Electrode Gas Discharge Tube
    500A
    90V
    400 V, 650V
    160 V
    Axial
    8.1 (Dia.) x 6.07mm
    -
    -
    8.1mm
    6.07mm
    +90°C
    -40°C
    Littelfuse
    GTCS26
    2 Electrode Gas Discharge Tube
    5kA
    90V
    550V
    -
    Surface Mount
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    25kA
    90V
    450 V, 550V
    90 V dc
    Surface Mount
    6.05 x 8.3 x 8.3mm
    -
    8.3mm
    8.3mm
    6.05mm
    +90°C
    -40°C
    Bourns
    2038
    Surge Absorber
    10kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    10kA
    470V
    860V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    -
    -
    -
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Littelfuse
    AC
    2 Electrode Arrester
    10kA
    720V
    1100 V, 1200V
    240 V ac
    Axial
    8 (Dia.) x 6mm
    -
    -
    -
    6mm
    +90°C
    -40°C
    Bourns
    2031
    2 Electrode Arrester
    1kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    90V
    700V
    -
    Through Hole
    8 (Dia.) x 10mm
    4.4mm
    -
    -
    10mm
    +85°C
    -30°C
    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
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    90V
    550V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
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