Resistor 2 banner cutout 770pxClaude Lyons produce an extensive range of high quality products to suit many applications.
Drawing on the long history from 1926 of the former British Electric Resistance Company ("BERCO®") the products of which became part of the Claude Lyons range in 1976, we pride ourselves on providing high quality resistors to a vast range of users including laboratories, industry and defence.

All Claude Lyons Berco® and Bercostat® resistive products are available with MOD and NATO codes to meet defence and maintenance requirements.

Bercostat® Rotary Rheostats - An extensive range of rotary rheostats to suit all industrial and laboratory needs comprising seven basic frame size models from 25 watts to 500 watts with ohmic values from 1Ω to 15kΩ. Available options include hand or motor driven, single or ganged, open or enclosed.


Berco® RA Fixed and Preset Resistors - A range of enamelled, silicone coated or open wire resistors available in power ratings from 20W to 380W with resistance, according to model, from 0.22Ω to 100kΩ.

RAH-K3 RA Fixed Resistor enamelled100px

Berco® Mica Card Resistors - Ratings from 45W to 260W. Available in a wide range of resistances.

Berco® 'J' Coil Resistors - A helix of edge wound resistance strip, mounted on porcelain insulators which in turn are mounted on a steel support.  The maximum surface area of the resistance material is exposed to the cooling air to give the maximum dissipation of heat and thus the highest possible rating. Available in ratings from 0.1Ω - 5.08Ω. J-Coil-100px
Berco® Tubular Fixed & Sliding Resistors - Tubular resistors meet the demand for users requiring high dissipation capacities. Their robust construction readily lends them to many industrial and laboratory uses. Single and multiple tube models are available. Ratings from 240W - 1080W 0.2Ω - 1.4KΩ. Tubular-fixed-100px

 For resistor specifications. availability and quotations, please contact usContact icons 40px


CL DgreyL outline 4ptv2

The Claude Lyons Group
2 Tower House, Hoddesdon, Herts, EN11 8UR, England
Spares are obtainable from who are stockists of surplus Claude Lyons units and spares .

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Company registered in England No 222791
Registered office as above

VAT Reg No. GB 213 5042 15


UK Established Since 1918

The Claude Lyons Group was founded in the UK in 1918 and is still in private ownership. Since our early days we have been innovators in areas related to voltage and power control and more recently in energy saving and harmonic mitigation. Operating as a global exporter with many years experience we can justifiably call ourselves a world leader in the field of voltage stabilisers, power conditioning and uninterruptible power supplies (UPS)