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https://industrial.panasonic.com/ww/products/pt/surge-components/models/ERZC20EK681 ERZC20EK681 - Varistors (ZNR Surge Absorber) - Circuit Protection (ESD, Surge, Fuse etc.) -... Product specifications and documents of ERZC20EK681, Varistors (ZNR Surge Absorber), Panasonic. circuit protectionvaristorsznrsurgeabsorber