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Surge Protection Components

It is important to protect any electrical equipment or circuitry you have from the harmful effects of power surges, so choose from our range of protective devices and components today. We’re able to offer you a wide variety of quality products from leading manufacturers including Bourns, Huber & Suhner, ON Semiconductor and Siemens.

How does surge protection work?

Power surges are a sudden increase in the electrical current being routed into power outlets. If a power surge happens, irreparable damage to equipment can be caused.

Surge protection is an essential and effective way of preventing this damage from occurring and can take many forms, from specialist plug sockets that absorb the additional voltage to components that can be used in the equipment itself.

What causes a power surge?

Power surges happen when the flow of electricity is briefly interrupted and started again. They can occur when equipment starts up or shut off. Classic examples of this would be air conditioning units, refrigeration equipment or motor-driven devices.

Power surges can also happen naturally, like a lightning strike or power lines coming down in a storm. They can also happen after mains power cuts when the power returns.

What is the difference between a surge and a spike?

  • If overvoltage increases for three nanoseconds or more this is called a surge.
  • If overvoltage increases for one or two nanoseconds this is called a spike.

What types of surge protection components are there?

Gas discharge tubes- a glass tube which is sealed at both ends, contains two electrodes and is filled with a gas that conducts electricity when a high voltage is applied. This type of component can be used to protect sensitive circuits.

Surge suppressor units - a common type of component, a surge suppressor unit can be built into a device, such as a power strip, or used as a standalone component.

Switching spark gap - these are used to switch between circuits quickly and are often used in the building and automotive industries.

Gas Discharge Tubes
Gas Discharge Tubes
Surge Suppressor Units
Surge Suppressor Units
Switching Spark Gaps
Switching Spark Gaps
Thermistor ICs
Thermistor ICs
Varistors
Varistors

4413 Products showing for Surge Protection Components

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1 of 221
In Stock
WJ Furse, ESP E Surge Suppressor Unit 36.7V Maximum Voltage Rating 20 kA Maximum Surge Current Twisted Pair Surge
  • RS Stock No. 456-8178
  • Mfr. Part No. 7TCA085400R0104 ESP 30E
Subtotal (1 unit)
£162.94(exc. VAT)
£162.94/unit
In Stock
WJ Furse, WBX Surge Protection Device ESP Protector
  • RS Stock No. 161-8374
  • Mfr. Part No. 7TCA085410R0032 WBXD4
Subtotal (1 unit)
£80.10(exc. VAT)
£80.10/unit
Temporarily out of stock
TDK, A71-H10X 1000 V dc 15 kA, Through Hole 2 Electrode Arrester Gas Discharge Tube
  • RS Stock No. 246-9901
  • Mfr. Part No. B88069X3820S102
Subtotal (1 unit)
£2.44(exc. VAT)
£2.44/unit
In Stock
Bourns, 1977 Coaxial Surge Protection 600V dc Maximum Voltage Rating 20 kA Maximum Surge Current Coaxial Surge Protector
  • RS Stock No. 785-8193
  • Mfr. Part No. 1977-09-A00
Subtotal (1 unit)
£80.81(exc. VAT)
£80.81/unit
In Stock
Mersen, STMT23 Surge Protector 275V ac Maximum Voltage Rating 20 kA Maximum Surge Current Type 2 Arrester, Type 3
  • RS Stock No. 179-3071
  • Mfr. Part No. 83230511 / STMT23-20K275V-SP-SM
Subtotal (1 unit)
£83.34(exc. VAT)
£83.34/unit
In Stock
TDK Thermistor, NTC Type 10 Ω 31 mm 26 mm 7 mm
  • RS Stock No. 185-7767
  • Mfr. Part No. B57464S0100M000
Subtotal (1 unit)
£5.11(exc. VAT)
£5.11/unit
In Stock
Sollatek, Hivoltguard Surge Suppressor Unit 230V Maximum Voltage Rating 6.5 kA Maximum Surge Current Overvoltage
  • RS Stock No. 311-5880
  • Mfr. Part No. 92615000
Subtotal (1 unit)
£44.44(exc. VAT)
£44.44/unit
In Stock
RS PRO RC Network Capacitor 500V Maximum Voltage Rating Mains Protector
  • RS Stock No. 240-393
Subtotal (1 unit)
£14.87(exc. VAT)
£14.87/unit
In Stock
WJ Furse, D Surge Arrester 280V Maximum Voltage Rating 32 A Maximum Surge Current Mains Protector
  • RS Stock No. 847-2696
  • Mfr. Part No. 7TCA085460R0322 ESP 240D-32A
Subtotal (1 unit)
£282.68(exc. VAT)
£282.68/unit
In Stock
RS PRO Thermistor, NTC Type 10 kΩ 63.5 mm 63.5 mm 2.4 mm
  • RS Stock No. 151-237
Subtotal (1 unit)
£4.08(exc. VAT)
£4.08/unit
In Stock
Eaton, SD Surge Suppressor Unit 32 V dc, 22V ac Maximum Voltage Rating 20 kA Maximum Surge Current Surge Protection
  • RS Stock No. 251-3823
Subtotal (1 unit)
£160.00(exc. VAT)
£160.00/unit
In Stock
RS PRO Metal Oxide Varistor 1.94 nF, Clamping 1.2 kV, Varistor 710 V
  • RS Stock No. 240-157
Subtotal (1 unit)
£26.09(exc. VAT)
£26.09/unit
In Stock
Bourns, GMOV Varistor 4 pF 6 kA, Varistor 275 V ac, 350 V dc, Disc
  • RS Stock No. 186-2134
  • Mfr. Part No. GMOV-14D271K
Subtotal (1 pack of 5 units)
£6.54(exc. VAT)
£1.308/unit
In Stock
WJ Furse, ESP 240 Surge Protection Device 280V Maximum Voltage Rating 10 kA Maximum Surge Current Low Current Mains
  • RS Stock No. 793-3783
  • Mfr. Part No. 7TCA085460R0081 ESP 240-16A/BX
Subtotal (1 unit)
£215.47(exc. VAT)
£215.47/unit
In Stock
RS PRO Surge Suppressor Unit 230V ac Maximum Voltage Rating 13.5 kA Maximum Surge Current Mains Protector
  • RS Stock No. 206-7522
Subtotal (1 unit)
£83.09(exc. VAT)
£83.09/unit
In Stock
WJ Furse, ESP M1 Surge Suppressor Unit 280V Maximum Voltage Rating 80 kA Maximum Surge Current Mains Surge Protector
  • RS Stock No. 456-8099
  • Mfr. Part No. 7TCA085460R0115 ESP 415M1R
Subtotal (1 unit)
£1,043.48(exc. VAT)
£1,043.48/unit
In Stock
WJ Furse, ESP 240 Surge Suppressor Unit 280V Maximum Voltage Rating 10 kA Maximum Surge Current Low Current Mains
  • RS Stock No. 456-8140
  • Mfr. Part No. 7TCA085460R0080 ESP 240-16A
Subtotal (1 unit)
£226.22(exc. VAT)
£226.22/unit
Last RS stock
Phoenix Contact, VAL-MS 230 Surge Arrester 230V ac Maximum Voltage Rating 40 kA Maximum Surge Current Surge Arrester
  • RS Stock No. 241-6066
  • Mfr. Part No. 2839127
Subtotal (1 unit)
£68.80(exc. VAT)
£68.80/unit
In Stock
Weidmüller, VARITECTOR Surge Protection Device 42V Maximum Voltage Rating 10 kA Maximum Surge Current
  • RS Stock No. 902-8066
  • Mfr. Part No. 1066490000
Subtotal (1 unit)
£98.09(exc. VAT)
£98.09/unit
In Stock
Weidmüller, 1348 Surge Suppressor Unit 48V Maximum Voltage Rating 10 kA Maximum Surge Current Cat-6 Surge Protector
  • RS Stock No. 249-3332
  • Mfr. Part No. 1348590000
Subtotal (1 unit)
£114.62(exc. VAT)
£114.62/unit
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