• +44 (0)1793 784389

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.

Explore metal oxide varistors (MOVs)

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.

Explore surge arrestors

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.

Explore selenium and silicon carbide suppressors

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.

Explore surge protection devices

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 VoltageVaristor VoltageEnergy RatingMaximum CurrentMaximum Clamping Voltage
Radial Lead MOVs11 - 1000 VAC (14 - 1465 VDC)18 - 1800 V0.6 - 725 J0.1 - 20 kA40 - 2970 V
Tab Lead MOVs130 - 1000 VAC (170 - 1350 VDC)205 - 4230 V100 - 3500 J10 - 70 kA325 - 2800 V
Case MOVs130 - 2800 VAC (170 - 3500 VDC)205 - 4700 V210 - 7000 J25 - 100 kA340 - 7400 V
Encapsulated MOVs130 - 660 VAC (175 - 850 VDC)200 - 1050 V370 - 1250 J40 kA320 - 1740 V
High Energy Bare MOV Discs130 - 1400 VAC (170 - 1750 VDC)200 - 2200 V310 - 7000 J10 - 70 kA340 - 3580 V

Thermally Protected MOVs

Maximum Continuous VoltageSurge CurrentVoltage Protection Rating
Thermally Protected MOVs150 - 690 VAC (200 - 910 VDC)25 - 50 kA600 - 2200 V

Surge Arrestors & Assemblies

Maximum Continuous Operating VoltageRated VoltageDC Reference VoltageCurrent Impulse Withstand CapacityMaximum Residual Voltage Ratio
Surge Arrestors480 - 6720 VDC280 - 6000 V600 - 9200 V40 - 100 kA1.69 - 1.88

Silicon Carbide Suppressors

Maximum Continuous Operating VoltageMaximum Continuous Power RatingMaximum Discharge CapacityVaristor Voltage Maximum
Silicon Carbide Suppressors135 - 1350 VAC (6 - 1500 VDC)1.5 - 40 W275 - 90000 J210 - 2160 V

Selenium Surge Suppressors (polarised)

Maximum DC VoltageMaximum Clamping VoltagePeak Discharge Current
Selenium Surge Suppressor (Polarized)90 - 675 VDC240 - 1800 V3 - 904 A

Thermally Protect Power Line SPDS

Series
System Voltage
Nominal Discharge Current
Surge Capacity per Phase
Maximum Continuous Operating Voltage
Dean HE1
120 - 480 V
10000 A
25000 - 50000 A
150 - 420 V
Dean HE2120 - 600 V
10000 A
50000 A
150 - 690 V
Dean HE3120 - 600 V
20000 A
100000 - 300000 A
150 - 690 V

Capacitors

custom DC link capacitor and busbarCustom Capacitor Solutions

power ring homepage buttonPower Ring

APCS standard test kitStandard Test Kits

Ceramic Capacitors

Recent News

More Information?

Telephone +44 (0)1793 784389 or email: sales@ppm.co.uk