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

4332 Products showing for Surge Protection Components

1 of 87
In Stock
EPCOS, Standard Metal Oxide Varistor 1.55 nF 100 A, Clamping 395 V, Varistor 240 V
  • RS Stock No. 289-7272
  • Mfr. Part No. B72220S0151K101
Subtotal (1 pack of 5 units)
$14.27(exc. GST)
In Stock
EPCOS, HighE Varistor 2.7 nF 300 A, Clamping 710 V, Varistor 430 V
  • RS Stock No. 266-5390
  • Mfr. Part No. B72240B0271K001
Subtotal (1 unit)
$55.21(exc. GST)
Currently unavailable
EPCOS, Standard Varistor 50 A, Clamping 1120 V
  • RS Stock No. 204-2179
  • Mfr. Part No. B72214S0421K101
Subtotal (1 pack of 5 units)
$4.92(exc. GST)
Temporarily out of stock
Bourns, MOV-14D Metal Oxide Varistor 430 pF 50 A, Clamping 775 V, Varistor 470 V
  • RS Stock No. 851-8335
  • Mfr. Part No. MOV-14D471K
Subtotal (1 unit)
$0.61(exc. GST)
In Stock
Littelfuse
  • RS Stock No. 760-7011
  • Mfr. Part No. V420LA40BP
Subtotal (1 pack of 5 units)
$8.14(exc. GST)
In Stock
Bourns, MOV-10DxxxK Metal Oxide Varistor 276 pF 25 A, Clamping 710 V, Varistor 430 V, Disc (10 mm)
  • RS Stock No. 233-0777
  • Mfr. Part No. MOV-10D431K
Subtotal (1 pack of 10 units)
$2.20(exc. GST)
In Stock
BC Components Thermistor, NTC Type 470 kΩ 9 mm 3.3 mm 3 mm
  • RS Stock No. 538-0806
  • Mfr. Part No. NTCLE100E3102JB0
Subtotal (1 pack of 5 units)
$4.53(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 kΩ 1.4 mm 0.8 mm 0.8 mm
  • RS Stock No. 769-1892
  • Mfr. Part No. B57540G1103F000
Subtotal (1 pack of 5 units)
$31.60(exc. GST)
In Stock
Vishay 220 kΩ
  • RS Stock No. 381-441
  • Mfr. Part No. NTCLE100E3223HB0
Subtotal (1 pack of 5 units)
$5.27(exc. GST)
In Stock
EPCOS, CU Varistor 10 A, Clamping 775 V
  • RS Stock No. 769-2025
  • Mfr. Part No. B72660M0271K072
Subtotal (1 pack of 5 units)
$8.50(exc. GST)
In Stock
Amphenol Advanced Sensors Thermistor 10 Ω
  • RS Stock No. 210-4310
  • Mfr. Part No. CL-120
Subtotal (1 pack of 10 units)
$18.03(exc. GST)
In Stock
Bourns 250 V dc 2 Electrode Gas Discharge Tube
  • RS Stock No. 768-7503
  • Mfr. Part No. 2049-25-BLF
Subtotal (1 pack of 10 units)
$13.75(exc. GST)
In Stock
Bourns, Varistor 430 V
  • RS Stock No. 851-8322
  • Mfr. Part No. MOV-14D431K
Subtotal (1 unit)
$0.75(exc. GST)
Limited stock
EPCOS Thermistor, NTC Type 22 kΩ 2 mm 3 mm 5 mm
  • RS Stock No. 191-2279
  • Mfr. Part No. B57164K0223J000
Subtotal (1 pack of 5 units)
$5.64(exc. GST)
In Stock
Littelfuse 100 A, Varistor 390 V
  • RS Stock No. 800-7052
  • Mfr. Part No. V250LA40AP
Subtotal (1 pack of 10 units)
$9.78(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 kΩ 6.5 mm 2.41 mm
  • RS Stock No. 528-8536
  • Mfr. Part No. B57861S0103J040
Subtotal (1 unit)
$2.28(exc. GST)
In Stock
TE Connectivity Thermistor, NTC Type 10 kΩ, Glass Encapsulation 65 mm 1.5 mm
  • RS Stock No. 893-7174
  • Mfr. Part No. GAG10K3976B1
Subtotal (1 unit)
$24.71(exc. GST)
In Stock
RS PRO, RC RC Network Capacitor 500V Maximum Voltage Rating Mains Protector
  • RS Stock No. 240-393
Subtotal (1 unit)
$25.97(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 Ω 31 mm 26 mm 7 mm
  • RS Stock No. 185-7767
  • Mfr. Part No. B57464S0100M000
Subtotal (1 unit)
$10.66(exc. GST)
Last RS stock
Bourns, MOV-14D Metal Oxide Varistor 50 A, Clamping 925 V
  • RS Stock No. 851-8341
  • Mfr. Part No. MOV-14D561K
Subtotal (1 unit)
$0.59(exc. GST)
In Stock
EPCOS NTC Thermistor, NTC Type 5000 Ω, Molded Plastic 17.5 mm 500 mm 8.5 mm
  • RS Stock No. 152-7132
  • Mfr. Part No. B57703M0103A019
Subtotal (1 unit)
$11.68(exc. GST)
In Stock
Phoenix Contact, PT-IQ-1X2+F-24DC-UT
  • RS Stock No. 767-5487
  • Mfr. Part No. 2800977
Subtotal (1 unit)
$441.92(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)
$3.47(exc. GST)
In Stock
Vishay 10 kΩ
  • RS Stock No. 819-9173
  • Mfr. Part No. NTCAIMME3C90373
Subtotal (1 unit)
$2.99(exc. GST)
In Stock
Littelfuse 50 A, Varistor 430 V
  • RS Stock No. 800-7068
  • Mfr. Part No. V275LA20AP
Subtotal (1 pack of 10 units)
$10.38(exc. GST)
In Stock
Phoenix Contact, TTC Surge Protector 30V dc Maximum Voltage Rating 30 A Maximum Surge Current Surge Protection Device
  • RS Stock No. 135-7118
  • Mfr. Part No. 2906848
Subtotal (1 unit)
$51.37(exc. GST)
Temporarily out of stock
WJ Furse, ESP Cat-6 Surge Suppressor Unit 5V Maximum Voltage Rating 10 kA Maximum Surge Current Cat-6 Surge Protector
  • RS Stock No. 788-6769
  • Mfr. Part No. 7TCA085400R0023 ESP CAT-6
Subtotal (1 unit)
$704.82(exc. GST)
In Stock
Littelfuse 20 A
  • RS Stock No. 760-6995
  • Mfr. Part No. V36ZA80P
Subtotal (1 pack of 5 units)
$10.39(exc. GST)
Temporarily out of stock
WJ Furse, ESP Cat-6 Surge Suppressor Unit 58V Maximum Voltage Rating 10 kA Maximum Surge Current Cat-6 PoE Surge
  • RS Stock No. 788-6763
  • Mfr. Part No. 7TCA085400R0024 ESP CAT-6/POE
Subtotal (1 unit)
$928.94(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 kΩ 2 mm 3 mm 5 mm
  • RS Stock No. 191-2263
  • Mfr. Part No. B57164K0103J000
Subtotal (1 pack of 5 units)
$5.16(exc. GST)
In Stock
Vishay 2.7 kΩ
  • RS Stock No. 754-6639
  • Mfr. Part No. NTCLE100E3272JB0
Subtotal (1 pack of 5 units)
$4.62(exc. GST)
In Stock
ABB, OVR Surge Protection Device 275V Maximum Voltage Rating 40 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 175-2594
  • Mfr. Part No. 2CTB815704R0800 OVR T2 3N 40-275s P TS QS
Subtotal (1 unit)
$631.49(exc. GST)
In Stock
BC Components Thermistor, NTC Type 9 mm 3.3 mm 3 mm
  • RS Stock No. 538-0733
  • Mfr. Part No. NTCLE100E3103JB0
Subtotal (1 pack of 5 units)
$5.12(exc. GST)
In Stock
Dehn, DV Modular Surge Protector 255V ac Maximum Voltage Rating 100 kA Maximum Surge Current Lightning Arrester
  • RS Stock No. 768-1716
  • Mfr. Part No. DV M TNS 255 FM
Subtotal (1 unit)
$4,461.80(exc. GST)
In Stock
Roxburgh EMC, DVS Varistor, Varistor 240 V
  • RS Stock No. 240-078
  • Mfr. Part No. DVS240
Subtotal (1 unit)
$58.62(exc. GST)
Stocked by manufacturer
Phoenix Contact, TTC Surge Protector 30V dc Maximum Voltage Rating 5 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 135-7144
  • Mfr. Part No. 2906731
Subtotal (1 unit)
$268.11(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 25 Ω 16 mm 11 mm 6 mm
  • RS Stock No. 467-624
  • Mfr. Part No. B57236S0250M000
Subtotal (1 unit)
$1.57(exc. GST)
In Stock
Roxburgh EMC, DVS Varistor
  • RS Stock No. 240-062
  • Mfr. Part No. DVS110
Subtotal (1 unit)
$142.25(exc. GST)
In Stock
Phoenix Contact, TTC Surge Protector 30V dc Maximum Voltage Rating 5 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 135-7132
  • Mfr. Part No. 2906862
Subtotal (1 unit)
$52.12(exc. GST)
In Stock
Panasonic, V Surge Absorber 1.1 nF 100 A, Clamping 545 V, Varistor 330 V
  • RS Stock No. 721-0033P
  • Mfr. Part No. ERZV20D331
Subtotal 2 units (supplied in a bag)
$6.33(exc. GST)
Temporarily out of stock
Phoenix Contact, TTC Surge Protector 30V dc Maximum Voltage Rating 10 kA Maximum Surge Current Surge Protection Device
  • RS Stock No. 135-7138
  • Mfr. Part No. 2906806
Subtotal (1 unit)
$239.45(exc. GST)
In Stock
EPCOS Thermistor, NTC Type 10 kΩ 6.5 mm 2.41 mm
  • RS Stock No. 706-2761
  • Mfr. Part No. B57861S0103F040
Subtotal (1 unit)
$3.40(exc. GST)
Last RS stock
Vishay PTC Thermistor, PTC Type 500 Ω 5.5 mm 5 mm
  • RS Stock No. 179-3911
  • Mfr. Part No. PTCCL05H280HBE
Subtotal (1 bag of 20 units)
$27.74(exc. GST)
In Stock
EPCOS, HighE Varistor 1 nF 300 A, Clamping 2000 V, Varistor 1200 V
  • RS Stock No. 291-3532
  • Mfr. Part No. B72240B0751K001
Subtotal (1 unit)
$75.05(exc. GST)
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)
$1,150.27(exc. GST)
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)
$241.06(exc. GST)
In Stock
Dehn, DSH Modular Surge Protector 255V ac Maximum Voltage Rating 50 kA Maximum Surge Current Lightning Arrester
  • RS Stock No. 786-9345
  • Mfr. Part No. DSH TNS 255
Subtotal (1 unit)
$2,797.44(exc. GST)
Last RS stock
EPCOS, T Disc Varistor 400 pF, Varistor 470 V
  • RS Stock No. 848-5617
  • Mfr. Part No. B72214T2301K105
Subtotal (1 pack of 5 units)
$13.98(exc. GST)
Last RS stock
Phoenix Contact, LIT 1X2-24 Surge Protector 24V dc Maximum Voltage Rating 20 kA Maximum Surge Current Surge Arrester
  • RS Stock No. 802-6678
  • Mfr. Part No. 2804610
Subtotal (1 unit)
$178.60(exc. GST)
In Stock
Roxburgh EMC
  • RS Stock No. 240-040
  • Mfr. Part No. DVS24
Subtotal (1 unit)
$58.97(exc. GST)
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