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

    MITSUBISHI MATERIALS
    DSA
    Surge Absorber
    2kA
    3600V
    -
    4320 V
    Through Hole
    6 (Dia.) x 21mm
    -
    6mm
    6mm
    21mm
    +125°C
    -40°C
    MITSUBISHI MATERIALS
    DSAZR
    Surge Absorber
    1kA
    800V
    -
    250 V
    Through Hole
    21.5 x 8.5 x 28.5mm
    12.5mm
    8.5mm
    28.5mm
    21.5mm
    -
    -
    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
    2036
    Surge Absorber
    20kA
    75V
    525V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Phoenix Contact
    CN-UB-G1
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    MITSUBISHI MATERIALS
    DSP
    Surge Absorber
    -
    140V
    -
    182 V
    Through Hole
    2.6 (Dia.) x 7mm
    -
    2.6mm
    2.6mm
    7mm
    +85°C
    -40°C
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    400V
    860V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    A71-H10X
    2 Electrode Arrester
    15kA
    1000V
    1300V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    420V
    900V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    350V
    750 V, 800V
    350 V dc
    Through Hole
    -
    -
    -
    -
    5mm
    +90°C
    -40°C
    Phoenix Contact
    COMTRAB
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    150V
    620V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    EPCOS
    EHV
    3 Electrode Arrester
    15kA
    90V
    300 V, 350V
    90 V dc
    Through Hole
    -
    -
    -
    10.5mm
    13.4mm
    +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
    Bourns
    2031
    2 Electrode Arrester
    1kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Littelfuse
    CG2
    2 Electrode Arrester
    2.5kA
    920V
    1200 V, 1500V
    -
    Axial
    8.1 (Dia.) x 6.07mm
    -
    -
    -
    6.07mm
    +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
    20kA
    230V
    450 V, 550V
    230 V dc
    Surface Mount
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2061
    2 Electrode Gas Discharge Tube
    60kA
    300V
    800V
    -
    Surface Mount
    11.8 (Dia.) x 12mm
    -
    -
    -
    12mm
    +85°C
    -30°C
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