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We stock thousands of circuit protection products for a broad range of applications from quality brands such as ABB, Bulgin, Bussman, E-T-A, Littelfuse, Schaffner and Schurter
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Over 40 Years Experience
E. Preston Electrical

Circuit Protection

What is a Circuit Protection device?

A circuit protection device is a fail-safe device that originates a disruption in an electrical circuit when it recognizes an excess and unsafe power load in a circuit. The main aims of circuit protection are to localise and isolate the situation or fault and avert and minimize any unnecessary power loss.

What Do We Supply?

We have broad selection of circuit protection devices, including:
Circuit breakers
Thermal circuit breakers
Thermal-magnetic circuit breakers
Magnetic circuit breakers
Hydraulic-magnetic circuit breakers
Fuses
LV fuse links
LV fusegear

Why Choose E. Preston?

Established in 1980, we offer customer service that is second to none. This is one primary factor behind the growth in business we have experienced over the past forty two years. We have expert knowledgeable staff who are always on hand to answer any technical questions you might have about our products – they are just a phone call away.

The second main reason behind the company’s growth is the sheer depth in our products. We stock, or have access to, thousands of circuit protection products for a broad range of applications. The quality brands that we deal with include ABB, Bulgin, Bussman, E-T-A, Littelfuse, Schaffner and Schurter. You don’t have to search anywhere else for your needs.

In addition, we will do our very best to make sure that you receive your order next day, as long as you order in time, and if required, and we can offer flexible payment terms.
to place an order or speak to our technical team about circuit protection devices.

Featured Products

Manufacturers

News

July 10, 2026

Schurter DMTH: Dip Switch

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The DMTH Series: A Robust and Cost-Effective DIP Switch

Schurter DMTH Pic

DMTH: The Industry Standard 2.54mm THT-DIP-Switch

  • 2.54mm standard pitch design
  • Low profile
  • High number of cycles
  • Through hole terminal

The DMTH series is a robust and cost-effective DIP switch designed for reliable manual configuration in industrial and electronic applications. Featuring the industry-standard 2.54mm pitch and THT mounting technology, it offers excellent compatibility with established PCB designs while ensuring secure mechanical retention and soldering reliability.

With up to 12 positions, SPST contacts, recessed or raised actuator options, and a low-profile 3.6mm design, DMTH supports flexible system configuration without increasing board space requirements. The switch is rated for up to 2,000 operating cycles and operates reliably from -40°C to +85°C.

Typical applications include address setting, communication protocol selection (e.g. RS-485, Modbus), function control, BIOS and hardware configuration, medical equipment parameter settings, HVAC systems, industrial controllers, robotics and consumer appliances. Combining proven performance, competitive cost and fast availability, DMTH is an ideal solution for OEMs seeking a reliable alternative to premium-priced DIP switch brands.

Schurter DMTH Apps

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

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July 9, 2026

Wieland Series SELOS WTN + SELOS WTPN

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Modern control cabinet solutions are no longer created from individual components, but from integrated systems that seamlessly combine planning, wiring, and labeling.

This is exactly where the selos system comes in: a modular, perfectly coordinated overall concept consisting of terminal blocks, digital planning tools, professional labeling, and services. Developed to make your processes easier, faster, and safer.

Wieland WTN + WTPN

Safe Wiring
With our selos WTPN terminal blocks with push-in connection, you can wire quickly, safely and completely without tools. For maximum flexibility, the selos WTN series with screw connection is also available - ideal for a wide range of applications and proven technology.

Your Advantages:

  • Tool-free quick wiring or proven screw technology
  • Extensive range of accessories for all variants
  • Space-saving design, high contact quality, and excellent vibration resistance
  • Faster installation processes
Wieland WTN

The SELOS WTN Din Rail Terminal Blocks with Screw Connection provides a reliable connection, solid and functional, known worldwide, and in use millions of times over.

The selos series combines the classic screw connection with modern connection technology, with the focus on customer benefits and increased efficiency in wiring and the supply chain.

  • Includes feed-through and ground blocks with 2, 3 or 4 termination points
  • Multi-tier blocks in two and three tier designs
  • Knife-edge disconnect blocks and fuse blocks
  • Specialty function blocks are available with a wide variety of diode circuits
  • Diverse application-specific terminals, such as transformer disconnect terminals
  • Smaller size – Uniform design – Fewer accessories
  • Rated cross-section 1.5mm2 to 240mm2
Wieland WTPN

The SELOS WTPN Din Rail Terminal Block with
Push-In Connection
terminates wires easily,
directly and without tools.

With an effective global concept, compact design
and high-performance contact technology, selos WTPN
minimizes the installation time and reduces inventory
costs to a minimum.

  • Includes Feed-through and ground blocks with 2, 3 or 4 termination point
  • Multi-tier blocks in two and three tier designs
  • Knife-edge disconnect blocks in one and two tier designs and fuse blocks
  • Specialty function blocks are available with application specific diode circuits

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

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