Surge Suppressors
Surge suppressors protect your systems from damaging voltage spikes and surges, safeguarding critical components and extending your equipment’s lifetime. By diverting excess voltage away from sensitive electronics, they help maintain reliability, reduce downtime, and ensure your operations run smoothly under both AC and DC conditions.
Protect your operations with Dean Technology surge suppressors, including MOVs, thermally protected MOVs, selenium suppressors, and assemblies. Explore our range to safeguard your systems and maintain reliable, uninterrupted performance.
Metal Oxide Varistors (MOVs)
Designed to protect your sensitive electronics from voltage spikes and transient surges, metal oxide varistors provide reliable clamping performance across a wide range of your power and industrial systems. Responding rapidly to overvoltage events, they divert energy away from your critical circuits to help prevent damage and maintain system stability. Available in multiple voltage variants and form factors, MOVs support surge protection in your power supplies, industrial equipment, and electronic systems in demanding electrical environments.
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Surge Arrestors
Engineered to protect your electrical infrastructure from high-energy overvoltage events, surge arresters safely divert transient energy away from your critical equipment. Designed for reliability in demanding environments, they help safeguard your power systems, distribution equipment and industrial installations from lightning strikes and switching surges. With robust construction and proven high voltage protection capability, surge arresters support the long-term reliability of your electrical networks and high-efficiency power applications.
Selenium and Silicon Carbide Suppressors
Designed for robust overvoltage protection in demanding environments, selenium and silicon carbide suppressors provide reliable clamping performance for high energy and high voltage applications. These technologies offer strong surge handling capability and durability under repeated stress, making them suitable for legacy systems and specialized industrial applications. With stable electrical characteristics and proven long-term reliability, they support protection in power systems, high voltage equipment and environments where rugged, established technologies are preferred.
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Surge Protection Devices
Designed for your high reliability protection and safeguarding in demanding high voltage environments, SPDs provide you with controlled suppression of transient overvoltage events. Engineered using advanced materials, precision manufacturing and compact designs, these devices offer you consistent clamping performance and high energy handling capability. Suitable for your applications including medical systems, industrial equipment, defence platforms, telecoms and commercial LED lighting, they enable you to effectively protect critical components while supporting your long-term system reliability.
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If you have certain specification requirements for suppression, please complete a copy of the questionnaire here and email to sales@ppm.co.uk
Metal Oxide Varistors
| Maximum Continuous Operating Voltage | Varistor Voltage | Energy Rating | Maximum Current | Maximum Clamping Voltage | |
|---|---|---|---|---|---|
| Radial Lead MOVs | 11 - 1000 VAC (14 - 1465 VDC) | 18 - 1800 V | 0.6 - 725 J | 0.1 - 20 kA | 40 - 2970 V |
| Tab Lead MOVs | 130 - 1000 VAC (170 - 1350 VDC) | 205 - 4230 V | 100 - 3500 J | 10 - 70 kA | 325 - 2800 V |
| Case MOVs | 130 - 2800 VAC (170 - 3500 VDC) | 205 - 4700 V | 210 - 7000 J | 25 - 100 kA | 340 - 7400 V |
| Encapsulated MOVs | 130 - 660 VAC (175 - 850 VDC) | 200 - 1050 V | 370 - 1250 J | 40 kA | 320 - 1740 V |
| High Energy Bare MOV Discs | 130 - 1400 VAC (170 - 1750 VDC) | 200 - 2200 V | 310 - 7000 J | 10 - 70 kA | 340 - 3580 V |
Thermally Protected MOVs
| Maximum Continuous Voltage | Surge Current | Voltage Protection Rating | |
|---|---|---|---|
| Thermally Protected MOVs | 150 - 690 VAC (200 - 910 VDC) | 25 - 50 kA | 600 - 2200 V |
Surge Arrestors & Assemblies
| Maximum Continuous Operating Voltage | Rated Voltage | DC Reference Voltage | Current Impulse Withstand Capacity | Maximum Residual Voltage Ratio | |
|---|---|---|---|---|---|
| Surge Arrestors | 480 - 6720 VDC | 280 - 6000 V | 600 - 9200 V | 40 - 100 kA | 1.69 - 1.88 |
Silicon Carbide Suppressors
| Maximum Continuous Operating Voltage | Maximum Continuous Power Rating | Maximum Discharge Capacity | Varistor Voltage Maximum | |
|---|---|---|---|---|
| Silicon Carbide Suppressors | 135 - 1350 VAC (6 - 1500 VDC) | 1.5 - 40 W | 275 - 90000 J | 210 - 2160 V |
Selenium Surge Suppressors (polarised)
| Maximum DC Voltage | Maximum Clamping Voltage | Peak Discharge Current | |
|---|---|---|---|
| Selenium Surge Suppressor (Polarized) | 90 - 675 VDC | 240 - 1800 V | 3 - 904 A |






















