What kind of conditions must RFI Suppressors withstand?
These suppressors (which also act as RFI filters) must also endure very harsh conditions existing on the 60 or 50 HZ AC Power line. These conditions include sudden increases of the AC line that may greatly exceed nominal operating conditions large transients with high Dv/Dt edges and lightning. For these reasons, RFI Suppressors must withstand voltages exceeding their nominal voltage ratings. They also must have self healing properties, which is the ability of the suppressor to cure itself when the dielectric is punctured due to an abnormal AC line disturbance or lightning strike. Due to these hazardous conditions and stringent requirements, these suppressors must be approved by all important Regulatory Agencies in the USA, Canada and Europe. These Agencies are subjecting RFI Suppressors to strict tests to assure their performance and safe operation on the AC line.
