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Thyristor Power Controllers (SCR) & Solid State Relays

Thyristor Controllers that accurately and reliably regulate power for optimal control and energy consumption.

Industrial Power Control You Can Depend On.

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Thyristor Controllers

Unmatched Control.Maximum Efficiency.

High-Reliability Thyristor Controllers Built for UK Manufacturing

When your production relies on electric heating, you need power control equipment that delivers precision, reliability, energy efficiency and maximum uptime.
CD Automation designs and manufactures UK-leading Thyristor Power Controllers (SCRs) and Solid State Relays engineered for continuous industrial duty — helping reduce downtime by up to 95% and lowering lifetime costs by as much as 90% compared with mechanical contactors.

Our solutions support demanding heating applications across plastics, food production, chemicals, heat treatment, ceramics, environmental chambers, and OEM machine building — delivering stable temperatures, tighter process control, and exceptional long-term performance.

Why Choose CD Automation Thyristor Power Controllers?

Best-in-Class Reliability for Industrial Heating

  • Zero mechanical wear - no contacts, no arcing, no failures
  • Designed for 24/7 industrial environments
  • Built-in protection reduces nuisance trips and prevents heater failure
  • Proven reliability in furnaces, ovens, extruders, kilns, IR heaters and transformer-driven loads

Exceptional Temperature & Process Accuracy

  • Ultra-precise SCR power regulation for consistent product quality
  • Multiple intelligent firing modes optimised for each heater type:
    • Burst firing for resistive loads
    • Phase angle for infrared and fast-response heaters
    • Soft start for transformer protection
    • Advanced HSC for inductive and complex industrial loads
  • Stable thermal profiles = fewer rejects and tighter process control

Energy-Efficient by Design

  • Optimised SCR control reduces electrical consumption
  • Smooth, stable power reduces heater fatigue and extends heater life
  • Integrated load diagnostics highlight inefficiencies before they affect operating cost
  • Supports energy-reduction initiatives and carbon-saving objectives

Simple, Flexible Integration with Your Control System

  • Compatible with PLCs, DCS, PID temperature controllers, and SCADA
  • Communication options: Modbus, Profinet, Profibus, EtherCAT, CANopen, analogue I/O
  • Clear front-panel and software diagnostics for fast commissioning
  • Designed for OEMs, integrators, and end users seeking plug-and-play power control

Need help finding the perfect product?

Use our simple product matrix.  Just select the 5 values and we'll show you the best possible product for your requirements.

Looking for an older or discontinued product? Find its recommended replacement here.

REVO-S Thyristor Family

Solid State Relay - REVO S

Designed to replace contactors, REVO-S solid state relays are suitable for currents up to 800A and voltages up to 690Vac. Available in single and 3 phase formats.
FEATURED PRODUCT
Multi-Zone Power Controllers

Multi-Zone Power Controllers

Do you need to control multiple heating zones seamlessly from one unit? Would optimising power to save energy be of interest? Then our range of multi-zone power controllers could be the solution you’re looking for.

Power Controller REVO C

Designed to connect seamlessly with the outside world, our intelligent family of REVO-C thyristor power controllers delivers real-life cost saving benefits.
REVEX-PA 3PH Thyristor Power Controller

Power Controller – REVEX PA

REVEX PA thyristor (SCR) power controllers are ideal for switching 3 phase inductive loads that require phase angle firing, with or without current limit.
REVO PB Power Optimisation Controller

Power Optimisation Controller - REVO PB

NEW REVO PB gives you 3 independent one phase controllers in a single package allowing you to optimise your electrical heating system & reduce your energy costs.
Multizone Solid State Relay

Solid State Relay - REVO SX Multi-zone

Multiple solid state relays in one compact module design, REVO-Sx is perfect for low and medium power applications where space is at a premium.
REVEX Thyristor Power Controller Family

Power Controller REVEX

Our money saving REVEX thyristor power controller has flexibility at the core if its design, ensuring you only pay for functionality you intend to use.

Why UK Manufacturers Trust CD Automation

  • 25+ years of industrial power-control expertise
  • UK-based technical support for fast response
  • Proven designs trusted by OEMs, integrators, and blue-chip manufacturers
  • Excellent lifetime value and low total cost of ownership
  • Extensive UK stock and short lead times for urgent projects
Whatever your process - resistive, infrared, transformer-driven or inductive - we provide a power control solution that improves throughput, quality, and energy efficiency.

Industries & Applications We Support

Our thyristor power controllers are optimised for heating processes in:
  • Plastics & Rubber: extrusion, injection moulding, thermoforming
  • Food & Beverage: ovens, fryers, drying, IR heating
  • Heat Treatment & Furnaces: electric furRnaces, annealing, tempering
  • Pharmaceutical & Life Science: bioreactors, process heating
  • Chemicals & Petrochemicals: reactor heating, drum heaters
  • Packaging & Converting: hot-melt, laminating, sealing
  • Ceramics, Glass & Kilns: high-temperature electric heating
  • Automotive & Aerospace: test cells, composite curing
  • Environmental Test Chambers: climatic and thermal cycling control

Ready to Improve Your Heating Process?

CD Automation helps UK manufacturers and machine builders achieve accurate, reliable, and energy-efficient electric heating control.

Call our UK engineering team on 01323 811100 for expert guidance or request a free application review to specify the right power controller for your project.

Our guide to Thyristors.

Explore our resources below to discover more about Thyristor Power Controllers and how they can help your company to improve machine efficiency and decrease downtime!

P.S. If you’re looking for ways to improve your machines performance, take 2 minutes out to request our free PDF article, 5 Mistakes made when Optimising machine performance

How to Size a Thyristor

How to size a Thyristor

How to size a Thyristor It is first necessary to recognise whether the application is single or three-phase. For single phase (1PH) you can use the calculation: total load (in…
What is a Thyristor

What is a Thyristor

What is a Thyristor? A Thyristor is a semiconductor device which acts as a switch. However, when switched on it can only pass current in one direction. It is in…
Where would I use a Thyristor?

Where would I use a Thyristor?

Where would I use a Thyristor? Thyristors are commonly used in AC circuits and for power control. The application, or the load being controlled, dictates which type of SCR (or…
How do Thyristors Work?

How do Thyristors work

How do Thyristors work? Thyristors are semiconductor devices that act as switches, controlling the flow of electrical current. In configurations involving back-to-back Silicon Controlled Rectifiers (SCRs), they allow the full…

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Inside, you’ll discover the 5 common mistakes that can affect machine performance and how to avoid them to save time, reduce downtime, and improve product quality.