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

4346 Products showing for Surge Protection Components

1 of 218
In Stock
EPCOS, Standard Metal Oxide Varistor 4.95 nF 10 A, Clamping 2970 V, Varistor 47 V
  • RS Stock No. 204-1930
  • Mfr. Part No. B72214S0300K101
Subtotal (1 pack of 5 units)
TWD67.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 3 kΩ 6.5 mm 2.41 mm
  • RS Stock No. 528-8508
  • Mfr. Part No. B57861S0302J040
Subtotal (1 unit)
TWD42.00(exc. GST)
In Stock
EPCOS, EHV 90 V dc 5 kA, Through Hole 2 Electrode Arrester Gas Discharge Tube
  • RS Stock No. 320-8926
  • Mfr. Part No. B88069X0720S102
Subtotal (1 unit)
TWD43.00(exc. GST)
In Stock
WJ Furse, ESP 240 Surge Suppressor Unit 280V Maximum Voltage Rating 10 kA Maximum Surge Current Low Current Mains
  • RS Stock No. 456-8128
  • Mfr. Part No. 7TCA085460R0083 ESP 240-5A
Subtotal (1 unit)
TWD6,061.00(exc. GST)
In Stock
TE Connectivity Thermistor, NTC Type 2.25 kΩ 2.4 mm 76 mm 2.4 mm
  • RS Stock No. 893-7234
  • Mfr. Part No. GA2.2K3A1IA
Subtotal (1 unit)
TWD238.00(exc. GST)
In Stock
Littelfuse, ZA Varistor Metal Oxide Varistor 9.29 nF 10 A, Clamping 1240 V, Varistor 33 V, Radial Leaded Ceramic Disc
  • RS Stock No. 543-5209
  • Mfr. Part No. V33ZA5P
Subtotal (1 pack of 5 units)
TWD79.00(exc. GST)
In Stock
EPCOS, B72220 Varistor 630 pF 100 A, Clamping 2970 V, Varistor 430 V
  • RS Stock No. 204-2208
  • Mfr. Part No. B72220S0271K101
Subtotal (1 pack of 5 units)
TWD111.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 5 kΩ 6.5 mm 2.41 mm
  • RS Stock No. 706-2771
  • Mfr. Part No. B57861S0502F040
Subtotal (1 unit)
TWD70.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 30 kΩ 6.5 mm 50 mm 2.41 mm
  • RS Stock No. 629-8736
  • Mfr. Part No. B57863S0303F040
Subtotal (1 unit)
TWD95.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 100 kΩ 1.4 mm 0.8 mm 0.8 mm
  • RS Stock No. 769-1903
  • Mfr. Part No. B57540G1104F000
Subtotal (1 pack of 5 units)
TWD612.00(exc. GST)
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)
TWD8,142.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 33 Ω 13 mm 8.5 mm 6 mm
  • RS Stock No. 185-7856
  • Mfr. Part No. B57153S0330M000
Subtotal (1 pack of 5 units)
TWD85.00(exc. GST)
In Stock
Vishay Thermistor, PTC Type 1 kΩ, L10 5 mm 3.6 mm 2.2 mm
  • RS Stock No. 179-3920
  • Mfr. Part No. TFPTL10L1001FL2B
Subtotal (1 tape of 20 units)
TWD410.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 Ω 18 mm 31 mm 7 mm
  • RS Stock No. 173-1182
  • Mfr. Part No. B57127P0100M301
Subtotal (1 bag of 200 units)
TWD10,180.00(exc. GST)
Limited stock
EPCOS NTC Thermistor, NTC Type 100 Ω 2 mm 5.5 mm 5 mm
  • RS Stock No. 152-7135
  • Mfr. Part No. B57164K0101K000
Subtotal (1 pack of 10 units)
TWD179.00(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 15 Ω 23 mm 16 mm 7 mm
  • RS Stock No. 185-7872
  • Mfr. Part No. B57238S0150M000
Subtotal (1 pack of 5 units)
TWD166.00(exc. GST)
In Stock
Amphenol Advanced Sensors NTC Thermistor, NTC Type 25 Ω
  • RS Stock No. 257-9504P
  • Mfr. Part No. CL-190
Subtotal 5 units (supplied in a bag)
TWD217.00(exc. GST)
Currently unavailable
Phoenix Contact, VAL Surge Protection Device 480V ac Maximum Voltage Rating 40 kA Maximum Surge Current Surge Protection
  • RS Stock No. 241-6116
  • Mfr. Part No. 2910374
Subtotal (1 unit)
TWD17,892.00(exc. GST)
In Stock
ABB, OVR Surge Protection Device 275V Maximum Voltage Rating 40 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 175-2600
  • Mfr. Part No. 2CTB815704R2600 OVR T2 40-275s C QS
Subtotal (1 unit)
TWD4,624.00(exc. GST)
Temporarily out of stock
Eaton, CROUSE-HINDS Surge Suppressor Unit 120V ac Maximum Voltage Rating 18 kA Maximum Surge Current Mains Surge
  • RS Stock No. 618-9597
  • Mfr. Part No. MA15/D/1/SI/RS
Subtotal (1 unit)
TWD5,822.00(exc. GST)
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