Switching Spark Gaps

Switching spark gaps are a voltage-controlled piece of equipment used in the surge protection of electrical devices. They are used to switch circuits where you need the switch to happen fast and at a high energy, but without losing too much of that energy. They break down in the event of a voltage spike, shunting the excess voltage safely to the ground. They can operate at a wide range of temperatures.

What are switching spark gaps used for?

Switching spark gaps are often used in heating and gas appliances, both in buildings and in automotive vehicles. They can also be found in high voltage switches, in power plants and electrical substations, and large power transformers.

Types of switching spark gaps

Switching spark gaps have differing capacities for operation. This means that their voltage tolerance, peak current, maximum switching frequency and breakdown voltage can all vary, sometimes significantly. They can also differ by size, in the length and diameter of their tube.


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Description Price Breakdown Voltage Voltage Tolerance Peak Current Maximum Switching Frequency Minimum Switching Operations Overall Length Lead Length Tube Length Tube Diameter Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 167-0455
Mfr. Part No.B88069X0260S102
BrandEPCOS
HK$27.72
Each (In a Bag of 100)
units
3000V - 50A 400Hz - 60mm 60mm - 0.8mm 0°C +100°C
RS Stock No. 771-0029
Mfr. Part No.B88069X0260S102
BrandEPCOS
HK$44.33
Each (In a Pack of 5)
units
3000V - 50A 400Hz - 60mm 60mm - 0.8mm 0°C +100°C
RS Stock No. 780-4880
Mfr. Part No.ST-0840-BLT-STD
BrandBourns
HK$26.358
Each (In a Pack of 5)
units
840V 12% 450A 500Hz 200000 Cycles 85mm 85mm 90mm 356mm -40°C +170°C
RS Stock No. 162-0261
Mfr. Part No.B88069X0680T502
BrandEPCOS
HK$12.84
Each (On a Reel of 500)
units
230V - 300A 25Hz - 60mm 60mm - 0.8mm -20°C +125°C
RS Stock No. 771-0026
Mfr. Part No.B88069X0680T502
BrandEPCOS
HK$26.36
Each (In a Pack of 5)
units
230V - 300A 25Hz - 60mm 60mm - 0.8mm -20°C +125°C
RS Stock No. 771-0022
Mfr. Part No.B88069X0270S102
BrandEPCOS
HK$44.33
Each (In a Pack of 5)
units
5000V - 30A 100Hz - 60mm 60mm - 0.8mm 0°C +100°C
RS Stock No. 167-0454
Mfr. Part No.B88069X0270S102
BrandEPCOS
HK$52.492
Each (In a Bag of 100)
units
5000V - 30A 100Hz - 60mm 60mm - 0.8mm 0°C +100°C
RS Stock No. 172-7269
Mfr. Part No.ST-0840-BLT-STD
BrandBourns
HK$10.915
Each (On a Reel of 1000)
units
840V 12% 450A 500Hz 200000 Cycles 85mm 85mm 90mm 356mm -40°C +170°C
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