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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
Surge Suppressor Units
Switching Spark Gaps
Thermistor ICs
Varistors

4465 Products showing for Surge Protection Components

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In Stock
L-Com, AL Surge Suppressor Unit 65V Maximum Voltage Rating Surge Protection
  • RS Stock No. 671-782
  • Mfr. Part No. AL-CAT6JW
Subtotal (1 unit)
£82.37(exc. VAT)
£82.37/unit
In Stock
L-Com, LPXTRJ45 Surge Suppressor Unit 60V Maximum Voltage Rating 100 A Maximum Surge Current Gas Discharge Tube
  • RS Stock No. 297-466
  • Mfr. Part No. LPXTRJ45-GBPOE++
Subtotal (1 unit)
£140.60(exc. VAT)
£140.60/unit
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
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
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
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
Stocked by manufacturer
Phoenix Contact, PT Surge Protection Device Base Element
  • RS Stock No. 170-554
  • Mfr. Part No. 2856265
Subtotal (1 pack of 10 units)
£641.96(exc. VAT)
£64.196/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
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
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
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
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
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
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
TDK Thermistor, NTC Type 10 kΩ, DO-35 2.2 mm 71 mm 1.3 mm
  • RS Stock No. 769-1919
  • Mfr. Part No. B57550G1103F000
Subtotal (1 pack of 5 units)
£16.20(exc. VAT)
£3.24/unit
Limited stock
Panasonic, V Surge Absorber 210 pF 25 A, Clamping 710 V, Varistor 430 V
  • RS Stock No. 785-8758
  • Mfr. Part No. ERZE07A431
Subtotal (1 pack of 25 units)
£2.23(exc. VAT)
£0.089/unit
In Stock
TDK, HighE Varistor 1.8 nF 300 A, Clamping 1.12 kV, Varistor 680 V
  • RS Stock No. 267-8273
  • Mfr. Part No. B72240B0421K001
Subtotal (1 unit)
£25.31(exc. VAT)
£25.31/unit
In Stock
Vishay NTC Thermistor, NTC Type 10000 Ω, Epoxy Coated 400 mm
  • RS Stock No. 782-889
  • Mfr. Part No. NTCLE413E2103H401A
Subtotal (1 unit)
£0.89(exc. VAT)
£0.89/unit
In Stock
Littelfuse, LA Varistor Metal Oxide Varistor 900 pF 100 A, Clamping 2.7 kV, Varistor 430 V, Disc
  • RS Stock No. 543-5142
  • Mfr. Part No. V275LA40AP
Subtotal (1 pack of 5 units)
£3.19(exc. VAT)
£0.638/unit
In Stock
Panasonic, V Surge Absorber 3.8 nF 2.5 A, Clamping 40 V, Varistor 18 V
  • RS Stock No. 720-9793P
  • Mfr. Part No. ERZV07D180
Subtotal 10 units (supplied in a bag)
£1.10(exc. VAT)
£0.11/unit
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