Contact Us
We have in stock, or can make available power supplies from well-known brand names such as Meanwell and Ideal Power
UK Next Day Delivery
Expert Advice
No Min Order Charges
Technical Support
Flexible Payment Terms
Over 40 Years Experience
E. Preston Electrical

Power Supplies

What are Power Supplies?

A power supply is a device that supplies electrical energy to an electrical load. It converts one form of electrical energy to another, such as converting AC (alternating current) to DC (direct current). Power supplies are used in a variety of electronic devices, from computers and cell phones to TVs and gaming consoles.

What Do We Supply?

We supply an extensive range of power supplies, including:
External Power Supplies
Battery Chargers
DC/DC Converters
LED Drivers
Internal Power Supplies (DIN rail, Enclosed, PCB Mount, Open Frame, U Frame)

Why Choose E. Preston?

In over forty years of being in business, we have built a reputation as a company that does business in a more traditional, perhaps old-fashioned way. In our customer service we pay attention to what some may see as small things, like ringing back when we say we are going to do so, and following through on promises.

We have staff who have expert knowledge and are happy to provide technical assistance to you on the products we sell, whenever you need it.

Where we can, we will ensure you get next day delivery on your product order, and we are also happy to discuss flexible payment terms if that will help.

One or great strengths at E Preston is our access to thousands of products, including power supply products, which will be suitable for a variety of uses and applications.

We have in stock, or can make available power supplies from well-known brand names such as Meanwell and Ideal Power.
If it is choice you need, then look no further than us
to discuss your power supply product requirements, or to ask a technical question.

Featured Products



May 20, 2024

Johnson Electric - Stepper Motors

Johnson Electric rotary and linear stepper motors are available in a wide range of sizes and customizable force or torque outputs. Most are available in unipolar or bipolar coil winding configurations.

Our Saia brand of stepper motors is engineered to meet the performance demands of specific applications that require precise position control including valves, HVAC, medical equipment, liquid dispensing and automation. We offer custom engineering to create motion control systems utilizing our precision stepper motors and control electronics, in collaboration with valve and system manufacturers.

Enquiry Form:

Home Page:

May 15, 2024

Crouzet Microswitch Range

65+ Years Designing & Manufacturing
Snap-Action Electrical Microswitches

Crouzet offers an extensive choice of standard or customized Classic, Miniature, Subminiature and Sub-subminiature micros-witches, with a large range of switching ratings from 1 mA to 25 A, magnetic blowout versions for High DC ratings, sealed models, positive break versions, a wide range of operating temperatures, special models for explosive atmospheres, long service life and an enormous variety of actuators, contact materials and fixing means.

Basic Technical Concepts

Our microswitches are high-precision, snap-action switches and these are the main features for which they are notable:

  • Fast and reliable switching largely independent of actuating speed
  • High electrical ratings but small dimensions
  • High repeat accuracy of switching points and forces
  • Low operating force
  • Short pre-travel but large overtravel
  • Very long service life
  • Extensive range of connections, fixing means and actuators for easy adaptation to numerous applications

Enquiry Form:

Home Page:

See all news
Privacy Policy
Website built and optimised by Miltec Digital

Get In Touch

Fill in your details to request a call from one of our sales representatives.
E Preston Contact Form
chevron-leftchevron-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram