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.

266 Products showing for Gas Discharge Tubes

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Subtotal (1 unit)
$3.05(exc. GST)
$3.05/unit
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  • RS Stock No. 320-8926
  • Mfr. Part No. B88069X0720S102
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$2.16(exc. GST)
$2.16/unit
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  • RS Stock No. 191-1541
  • Mfr. Part No. B88069X1630T602
Subtotal (1 unit)
$3.62(exc. GST)
$3.62/unit
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  • RS Stock No. 287-9661P
  • Mfr. Part No. GDT25-42-S1-RP
Subtotal 10 units (supplied on a continuous strip)
$14.31(exc. GST)
$1.431/unit
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$235.20(exc. GST)
$2.352/unit
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$1,614.50(exc. GST)
$3.229/unit
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$1,429.00(exc. GST)
$1.429/unit
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Subtotal (1 pack of 5 units)
$16.56(exc. GST)
$3.312/unit
Last RS stock
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$3.32(exc. GST)
$3.32/unit
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Subtotal (1 pack of 5 units)
$20.68(exc. GST)
$4.136/unit
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Subtotal (1 unit)
$5.02(exc. GST)
$5.02/unit
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  • RS Stock No. 461-4287
  • Mfr. Part No. B88069X0660S102
Subtotal (1 unit)
$2.79(exc. GST)
$2.79/unit
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Subtotal (1 unit)
$3.66(exc. GST)
$3.66/unit
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Subtotal (1 unit)
$7.27(exc. GST)
$7.27/unit
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Subtotal (1 unit)
$2.26(exc. GST)
$2.26/unit
Subtotal (1 unit)
$76.14(exc. GST)
$76.14/unit
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Subtotal (1 unit)
$5.10(exc. GST)
$5.10/unit
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Subtotal (1 unit)
$3.14(exc. GST)
$3.14/unit
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Subtotal (1 unit)
$32.15(exc. GST)
$32.15/unit
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Subtotal (1 pack of 5 units)
$23.08(exc. GST)
$4.616/unit
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