Power Surge Protection

PowerSoak - your first line
of defence against damaging
voltage spikes & surges.

Modern businesses rely on sensitive electronic equipment - from computers and building management systems to industrial drives and automated machinery. But one unexpected mains-borne voltage spike can bring everything to a halt, damaging your equipment and costing thousands in downtime.

At Power Capacitors, we deliver trusted, UK-made surge protection devices designed to keep your operations safe, stable, and uninterrupted. Our PowerSoak Surge Arrestor offers an easy-to-integrate, high-performance solution to protect your electrical systems where it matters most.

What is surge protection?

A surge protection device (SPD) is your first line of defense against sudden electrical surges and voltage spikes that can damage sensitive equipment. These power disturbances can occur due to:

  • Lightning
    Lightning strikes
    near your power
    network
    Lightning Image
  • Electricity
    Switching operations
    within the electricity
    grid
    Electricity Image
  • Faults
    Faults elsewhere
    in your electrical
    system
    Faults Image

Left unprotected, these spikes can lead to equipment failure, operational downtime, and costly repairs.

Call 0121 708 4511

Surge protection devices
SPDs are classified into three main types:
1
Installed at
the main power
supply entry
2
Positioned along
the building's
distribution
3
Placed closest
to the sensitive
devices
While the ideal setup combines all three, many businesses prefer a simpler,
cost-effective solution. That's where PowerSoak comes in.

PowerSoak -

a single solution

PowerSoak Surge Arrestors are industrial grade surge protection devices designed and manufactured in-house, right here in the UK.

Built by our skilled power quality team with over 130 years of power quality expertise, they provide robust, reliable protection without the complexity of multi-layer SPD installations.

Key Features

1.
High-performance protection

3-phase Type 2 suppression module compliant with EN 61643-11.

2.
Fast, effective response

Voltage protection level below 1kV, 20kA nominal discharge current.

3.
Heavy-duty build

Short-circuit withstand of 50kArms

4.
Flexible use

Suitable for TNC and TNS electrical systems, available in both 3-wire and 4-wire models.

5.
Durable design

Housed in a robust steel enclosure for long-lasting reliability.

With PowerSoak surge protection, you can reduce the risk of damage to your
equipment and maintain smooth, uninterrupted operations.

Why choose us for surge protection?

For over 50 years, Power Capacitors has been a leading name in UK power quality solutions. We’re not just another supplier – we’re a trusted partner committed to helping businesses safeguard their electrical infrastructure.

Here's what sets us apart

  • Free expert

    consultations

    To assess your
    surge protection
    needs.
    Free Expert Consultations Image
  • Proven

    reliability

    UK manufacturing
    for assured
    quality.
    Iso 9001 Certified Image
  • Trusted

    Design

    With thousands
    of units installed
    nationwide.
    Proven Reliability Image
  • Professional

    service

    From a team that
    understands industrial
    power systems.
    Professional Service Image

FAQs

1.

A surge protection device (SPD) is a piece of electrical safety equipment that safeguards your power system and sensitive electronics from damaging voltage spikes or power surges. Events such as lightning strikes, grid switching, or electrical faults can cause sudden overvoltages that damage machinery, IT systems, or building management controls. Installing a high-quality surge arrestor like PowerSoak helps prevent costly downtime and equipment replacement.

2.

Yes, most businesses rely on electronic control systems, computers, and automated machinery that are highly sensitive to voltage fluctuations. A single mains-borne surge can cause data loss, breakdowns, or complete system shutdowns. Our PowerSoak industrial surge protector is a cost-effective solution that reduces these risks and helps ensure business continuity.

3.

PowerSoak is designed as a robust, Type 2 surge protection solution that’s easy to integrate into existing electrical distribution networks. It offers <1kV protection level, 20kA nominal discharge current, and 50kArms short-circuit withstand, providing reliable protection for critical systems. Unlike many imported units, PowerSoak is manufactured in the UK by Power Capacitors Ltd, backed by over 50 years of expertise in power quality solutions.

4.

Yes. The PowerSoak SPD is available in 3-wire and 4-wire models, making it suitable for both TNC and TNS earthing systems commonly used in UK and European industrial and commercial installations. Our specialists can recommend the best surge protection setup for your building or site.

5.

In most cases, installing a PowerSoak Type 2 surge protection device provides strong, practical protection without requiring multiple devices. However, in environments with high exposure to lightning or highly sensitive electronics, a coordinated surge protection strategy (Types 1, 2, and 3) may be recommended. We offer free surge protection consultations to help you design the right solution for your facility.

Get protected today

The cost of surge protection is small compared to the potential loss from an unprotected power spike. With PowerSoak, you get lasting peace of mind.

Call 0121 708 4511

What our customers say

★★★★★
"They arrived on site, diagnosed the issue immediately, and got us sorted first time."

HVAC systems

★★★★★
"They've clearly invested in holding proper stock — we’ve never had a delay on parts."

Motor control

★★★★★
"Their bespoke PFC panel perfectly fitted the constrained space available in our switch room."

Pharmaceutical