R3&A Limited
R3&A Limited is a Canadian, independent, private owned company located in Cobourg, Ontario offering complete solutions of Surge and Lightning Protection, and Domotics - Home Automation - Systems. We have strong and close partnerships with well known suppliers like DEHN and TELETASK and are their exclusive business partner for the Canadian market. R3&A Limited offers extensive support and customer service on the spot. Additionally, we organise seminars, webinars, lectures, and supply detailed information and designing material. R3&A Limited is a company with over 25 years of experience in lightning and surge protection as well as in the field of Domotics (home automation).


External Lightning Protection System Design More comprohensive than CSA B-72, UL 96 and NFPA 780, the IEC 62305 provides for a more robust external lightning protection system. R3A and DEHN provide design assistance from engineering through installation. Internal Lightning and Surge Protection System Design We offer comphrehensive planning and design services for internal lightning and surge protection in accordance with the Lightning Protection Zone concept “LPZ”.

News Facts

DEHNshield® ... (FM) Lives up to what other arresters promise! DEHNvario 3 in 1 surge arrester protects analogue camera systems DEHNclip® rebar clip Down conducters can now safely and quickly be connected to the reinforcement TELETASK- Energy Management without Worries Learn how to reduce your carbon footprint and lower your energy costs.

R3A Learning Centre

Attending our Seminar and Webinars is your opportunity to learn more about Lightning and Surge currents/waveforms, what they are, how they come into existence, protection guidelines, installation code, standards, case studies and practice. In these Seminars and Webinars we pass on decades of information to our customers. Our news letter comes out every quarter and will inform you about the latest developments concerning products, standards and installation practices.
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Your Partner in Lightning and Surge Protection Solutions, and Domotics