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
    25kA
    600V
    950 V, 1100V
    600 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    400V
    900V
    -
    Surface Mount
    8 (Dia.) x 10mm
    -
    -
    -
    10mm
    +85°C
    -30°C
    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
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    470V
    990V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    2095
    2 Electrode Gas Discharge Tube
    8kA
    3000V
    4200V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    Bourns
    2051
    2 Electrode Arrester
    2kA
    90V
    500 V, 600V
    90 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
    230V
    500 V, 600V
    230 V dc
    Through Hole
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
    Bourns
    2017
    2 Electrode Gas Discharge Tube
    12kA
    90V
    450 V, 800V
    90 V dc
    Surface Mount
    8 (Dia.) x 2mm
    -
    -
    8mm
    2mm
    +85°C
    -55°C
    Bourns
    2046
    3 Electrode Gas Discharge Tube
    20kA
    230V
    700V
    -
    Through Hole
    8 (Dia.) x 10mm
    4.4mm
    -
    -
    10mm
    +85°C
    -30°C
    Littelfuse
    SL11021A
    3 Electrode Arrester
    10kA
    250V
    500V
    -
    Radial
    8.1 (Dia.) x 10.1mm
    4.4mm
    -
    -
    10.1mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    20kA
    350V
    650 V, 800V
    350 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
    GDT25
    Surge Arrester
    10kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    25kA
    600V
    950 V, 1100V
    600 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    540 → 720V
    1000 V, 1100V
    720 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    540 → 720V
    1000 V, 1100V
    720 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°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
    2031
    Gas Discharge Tube
    -
    185V
    650V
    230 V
    Surface Mount
    5 Dia. x 4.4mm
    -
    5mm
    -
    4.4mm
    +90°C
    -40°C
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    350V
    750 V, 800V
    350 V dc
    Through Hole
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
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