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
    2046
    3 Electrode Gas Discharge Tube
    20kA
    230V
    700V
    -
    Through Hole
    8 (Dia.) x 10mm
    4.4mm
    -
    -
    10mm
    +85°C
    -30°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
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    600V
    1200V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    Bourns
    2036
    3 Electrode Gas Discharge Tube
    20kA
    90V
    250 V, 550V
    -
    Surface Mount
    7.3 x 5 x 5mm
    3.3mm
    5mm
    5mm
    7.3mm
    +85°C
    -55°C
    Bourns
    SM
    3 Electrode Gas Discharge Tube
    4kA
    185V
    650V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2029
    2 Electrode Gas Discharge Tube
    10A
    90V
    600V
    -
    Surface Mount
    7.9 x 6 x 7.5mm
    -
    6mm
    7.5mm
    7.9mm
    +105°C
    -55°C
    Littelfuse
    CG
    2 Electrode Arrester
    4kA
    108V
    400V
    -
    Axial
    8.1 (Dia.) x 6.07mm
    -
    -
    -
    6.07mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    2kA
    90V
    700V
    -
    Surface Mount
    3.5 x 2.8 x 2.8mm
    -
    2.8mm
    2.8mm
    3.5mm
    +90°C
    -40°C
    Bourns
    2089
    2 Electrode Gas Discharge Tube
    3kA
    3600V
    4600V
    -
    Axial
    5.5 (Dia.) x 6mm
    -
    -
    -
    6mm
    +85°C
    -30°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
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    150V
    450 V, 550V
    150 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    GDT25
    Surge Arrester
    10kA
    420V
    820V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    5kA
    90V
    500 V, 600V
    90 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +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
    Bourns
    2095
    2 Electrode Gas Discharge Tube
    8kA
    4000V
    5500V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    Littelfuse
    SL10021A
    3 Electrode Arrester
    10kA
    108V
    500V
    -
    Radial
    8.1 (Dia.) x 10.1mm
    4.4mm
    -
    -
    10.1mm
    +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
    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
    350V
    810V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
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