Over 800,000 products available

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

4412 Products showing for Surge Protection Components

1 of 221
In Stock
Red Lion, R-C Surge Suppressor Unit 250V dc Maximum Voltage Rating Inductive Load Suppressor
  • RS Stock No. 905-5771
  • Mfr. Part No. SNUB0000
Subtotal (1 unit)
£11.50(exc. VAT)
£11.50/unit
In Stock
WJ Furse, ESP Q Surge Suppressor Unit 37.8V Maximum Voltage Rating 20 kA Maximum Surge Current 8 Wire 30 V Surge
  • RS Stock No. 788-6731
  • Mfr. Part No. 7TCA085400R0107 ESP 30Q
Subtotal (1 unit)
£439.22(exc. VAT)
£439.22/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
In Stock
RS PRO, High Power Metal Oxide Varistor, Insulated Plastic Case
  • RS Stock No. 240-242
Subtotal (1 unit)
£54.64(exc. VAT)
£54.64/unit
Stocked by manufacturer
ABB, OVR Surge Protection Device 400V ac Maximum Voltage Rating 80 kA Maximum Surge Current Surge Protective Devices SPD
  • RS Stock No. 231-9984
  • Mfr. Part No. 2CTB815710R1900 OVR T1-T2 3N 12.5-275s
Subtotal (1 unit)
£468.21(exc. VAT)
£468.21/unit
In Stock
Eaton, SD32 Surge Protection Device 32V Maximum Voltage Rating 20 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 144-8697
  • Mfr. Part No. SD32MXX-BCN
Subtotal (1 unit)
£178.06(exc. VAT)
£178.06/unit
In Stock
Phoenix Contact, TTC Surge Protector 30V dc Maximum Voltage Rating 10 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 135-7136
  • Mfr. Part No. 2906804
Subtotal (1 unit)
£77.64(exc. VAT)
£77.64/unit
Stocked by manufacturer
ABB, RT5/90 Surge Suppressor Unit 90V Maximum Voltage Rating Transil Diode
  • RS Stock No. 259-6041
  • Mfr. Part No. 1SBN050020R1002
Subtotal (1 unit)
£39.41(exc. VAT)
£39.41/unit
In Stock
Dehn, DG Modular Surge Protector 275V ac Maximum Voltage Rating 40 kA Maximum Surge Current Type 2 Arrester
  • RS Stock No. 768-1741
  • Mfr. Part No. DG M TNS 275 FM
Subtotal (1 unit)
£397.28(exc. VAT)
£397.28/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
Sollatek, AVS30 Surge Suppressor Unit 320V ac Maximum Voltage Rating 6.5 kA Maximum Surge Current Surge/Spike Protection
  • RS Stock No. 311-5868
  • Mfr. Part No. 91300000
Subtotal (1 unit)
£80.37(exc. VAT)
£80.37/unit
In Stock
WJ Furse, ESP SL Surge Suppressor Unit 36.7V Maximum Voltage Rating 20 kA Maximum Surge Current Twisted Pair Surge
  • RS Stock No. 788-6725
  • Mfr. Part No. 7TCA085400R0070 ESP SL30L/4-20
Subtotal (1 unit)
£179.17(exc. VAT)
£179.17/unit
In Stock
Mersen, STMT23 Surge Protector 230V Maximum Voltage Rating 10 kA Maximum Surge Current Type 2+3/Class II+III
  • RS Stock No. 179-3083
  • Mfr. Part No. 83230512 / STMT23-10K320V-SP-SF
Subtotal (1 unit)
£59.91(exc. VAT)
£59.91/unit
In Stock
ABB, OVR Surge Protection Device 275V Maximum Voltage Rating 40 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 175-2595
  • Mfr. Part No. 2CTB815704R0200 OVR T2 1N 40-275s P TS QS
Subtotal (1 unit)
£128.61(exc. VAT)
£128.61/unit
In Stock
Eaton, SLP Surge Suppressor Unit 32V Maximum Voltage Rating 20 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 618-9777
  • Mfr. Part No. SLP32D/RS
Subtotal (1 unit)
£209.07(exc. VAT)
£209.07/unit
Last RS stock
Mersen, STPT12 Surge Protector 400V ac Maximum Voltage Rating 12.5 kA Maximum Surge Current Type 2 Arrester, Type 1
  • RS Stock No. 179-3057
  • Mfr. Part No. 83120145 / STPT12-12K275V-4PM
Subtotal (1 unit)
£384.26(exc. VAT)
£384.26/unit
Temporarily out of stock
RS PRO, BS1363 Surge Suppressor Unit 230V ac Maximum Voltage Rating 13.5 kA Maximum Surge Current Mains Protector
  • RS Stock No. 206-7522
Subtotal (1 unit)
£67.87(exc. VAT)
£67.87/unit
In Stock
RS PRO, MAXX Surge Suppressor Unit 253V Maximum Voltage Rating 6.5 kA Maximum Surge Current EMC Filter
  • RS Stock No. 206-7910
Subtotal (1 unit)
£183.98(exc. VAT)
£183.98/unit
Stocked by manufacturer
WJ Furse, DS Surge Arrester 280V Maximum Voltage Rating 0.032 kA Maximum Surge Current Mains Protector
  • RS Stock No. 847-2709
  • Mfr. Part No. 7TCA085460R0318 ESP 240DS-32A
Subtotal (1 unit)
£250.78(exc. VAT)
£250.78/unit
In Stock
WJ Furse, ESP SL Surge Suppressor Unit 36.7V Maximum Voltage Rating 20 kA Maximum Surge Current Twisted Pair Surge
  • RS Stock No. 788-6700
  • Mfr. Part No. 7TCA085400R0067 ESP SL30
Subtotal (1 unit)
£150.62(exc. VAT)
£150.62/unit
1
2
3
221
Results per page

Guides & Articles

Variable Resistors Guide
From types to applications, discover all you need to know about variable resistors in our handy guide.
Read More
Capacitors Guide
In our comprehensive capacitors guide, we look at MLCCs and the alternatives available.
Read more
A Complete Guide to Industrial Surge Protection
Discover more in our guide and get to know the uses and importance of an industrial surge protection device.
Read more

Related links