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
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    110V
    510V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    230V
    640V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    2095
    2 Electrode Gas Discharge Tube
    8kA
    1600V
    2400V
    -
    Axial
    8 (Dia.) x 8mm
    -
    -
    -
    8mm
    +85°C
    -30°C
    MITSUBISHI MATERIALS
    DSA
    Surge Absorber
    2kA
    3000V
    -
    3600 V
    Through Hole
    6 (Dia.) x 21mm
    -
    6mm
    6mm
    21mm
    +125°C
    -40°C
    EPCOS
    A71-H08X
    2 Electrode Arrester
    15kA
    800V
    1000V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT35
    3 Electrode Gas Discharge Tube
    20kA
    400V
    860V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    10kA
    540 → 720V
    1000 V, 1100V
    720 V dc
    Through Hole
    -
    -
    -
    -
    6.05mm
    +90°C
    -40°C
    Bourns
    2031
    Gas Discharge Tube
    -
    185V
    650V
    230 V
    Surface Mount
    5 Dia. x 4.4mm
    -
    5mm
    -
    4.4mm
    +90°C
    -40°C
    Bourns
    2036
    Surge Absorber
    20kA
    75V
    525V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    10kA
    420V
    820V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    2035
    2 Electrode Gas Discharge Tube
    5000A
    90V
    350 V, 525V
    -
    Surface Mount
    4.4 x 5 x 5mm
    3.9mm
    5mm
    5mm
    4.4mm
    +85°C
    -55°C
    EPCOS
    A71-H25X
    2 Electrode Arrester
    15kA
    2500V
    3900V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    EHV
    2 Electrode Arrester
    5kA
    300V
    450 V, 550V
    300 V dc
    Through Hole
    -
    -
    -
    6.7mm
    4.7mm
    +90°C
    -40°C
    Bourns
    GDT25
    Surge Arrester
    10kA
    470V
    860V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    EPCOS
    A71-H45X
    2 Electrode Arrester
    15kA
    2500V
    5800V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Bourns
    GDT25
    Surge Arrester
    10kA
    150V
    500V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    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
    110V
    510V
    -
    Surface Mount
    -
    -
    -
    -
    -
    -
    -
    Phoenix Contact
    COMTRAB
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
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