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Official distributor and wholesaler of relays from brands such as Crouzet, Crydom and Finder
UK Next Day Delivery
Expert Advice
No Min Order Charges
Technical Support
Flexible Payment Terms
Over 40 Years Experience
E. Preston Electrical

Relays

What is a Relay?

Relays are electrically operated switches that open and close circuits receiving electrical signals from external sources. The relays built into electrical products work in a similar way; they receive an electrical signal and send the signal to other equipment by turning the switch on and off. The three main functions of relays are to allow a small amount of electrical current to control high current loads, send different types of electrical signals, and drive multiple outputs with just one input.

What Do We Supply?

We have a broad range of relays in stock, including:
Modular step relays
Monostable relays
Ultra-slim PCB relays
Relay interface modules
Miniature PCB/plug-in relays
Low profile PCB relays
Miniature industrial relays
Safety relays
Power relays
Miniature power relays
Solid State relays
Relay bases
Coil indication
EMC protection

Why Choose E. Preston?

We are an official distributor and wholesaler of relays from brands such as Crouzet, Crydom and Finder. These are well known companies in their fields with excellent reputations for the quality of their products.

What really sets us aside from our competition is our choice and range of relays – you really don’t need to look anywhere else for your requirements.

As we have been operating for over forty years, we have developed a fantastic relationship with our suppliers. This benefits us in two main ways: We gain access to the widest choice of components from those suppliers, and secondly, they sell us those components at competitive prices because we purchase such significant volumes. We are able to pass on those competitive prices to you, our customer.

We have a large stockholding of our products at our warehouse in Dukinfield, Cheshire in the UK. This stock means that our product availability is consistently high, and we can get your order for stock items out to you in a 24 to 48 hour time frame.
and we can talk through your specific relay requirements.

Featured Products

Manufacturers

News

September 3, 2026

Finder 18 Series: PIR movement and presence detector 10A

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18 Series: PIR movement and presence detector 10A

Finder 18 series

The Finder 18 Series is a range of 14 movement and presence detectors in both indoor and outdoor versions, for ceiling and wall mounting.

Features (according to Type):

  • Small Size
  • Twilight Sensor and Delay Time

Versions with DALI interface and KNX interface are also available.

Applications:

  • Hotel Room Energy-Enabling Units
  • Lighting Control in Corridors (for hotels, offices and hospitals)
  • Offices, Swimming Baths and SchoolS
  • Staircase Light Control

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

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

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August 26, 2026

Schurter STTP 9550: Three-Terminal Fuse

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Schurter Three-Terminal Fuses (STTP) for Battery Systems

Schur 9550 pic

Intelligent Fuse Solutions for Battery Systems

  • Ultra-Low Contact Resistance for High Efficiency
  • High Contact Reliability for Low Signals
  • Enhanced Wear Resistance for Long‑Term Contact Integrity
  • Supports Miniaturization and High‑Power Density Design

The Schurter three-terminal fuses STTP 9550 combine conventional overcurrent protection with an actively triggered overcharge protection function, providing an additional layer of safety for lithium-ion battery systems.

In addition to current-dependent interruption, the integrated trigger terminal enables controlled activation in critical operating conditions. This allows reliable disconnection of charge and discharge paths even in the event of protection IC or FET failure.

Gold-plated terminals ensure low and stable contact resistance, high signal integrity, and
excellent corrosion resistance. The compact package supports high-power-density battery pack
designs ranging from 1 to 24 cells.

Applications:
Typical applications include energy storage systems, power tools, UPS equipment, e-bikes, e
scooters, and automated guided vehicles (AGVs). Supported by UL approvals and designed for
redundant protection architectures required by modern battery safety standards, three-terminal
fuses provide a robust and intelligent protection solution for advanced energy systems.

Schur 9550 app

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

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

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UK distributor of electrical and electronic components.

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