HUAAN LIMITED was established in 2004, in providing outstanding quality services in the areas of product research, development and marketing. We see ourselves as leading suppliers in the areas of Gas Discharge Tubes, Resettable Fuses PTC , SIDACTor Protection Thyristors,Surge Absorbers Products. All our products are tested and guaranteed in providing full electrical surge protection making them ever more reliable and safe for your usage. We pride ourselves in the production and manufacturer of Gas Discharge Tubes, Resettable Fuses PTC , SIDACTor ProtectionThyristors ,Surge Absorbers that are used by our customers in a wide range of applications such as Surge Protective Devices,VDSL, ADSL,ISDN,CATV, Video transmitters, Switch machines, Telephones, Power Meters,Lightning protection sockets, Power Transmitters, Network Transformers, Power Supply units, Access controller, RS485 Transmission, Routers, and Modems, to name a range of applications where our products can be used. As a company, HUAAN LIMITED has been awarded the industry standard of quality of ISO9001-2000QMS (Quality Management System). All of the products are compliant with the ITU-T K.12 Recommendation Standard and the Chinese Technical Standards: GB/T18802.311-2007/IEC61643-311:2001,YD/T694. All our Gas Discharge Tubes ,Resettable Fuse PTC, SIDACTor Protection Thyristors,Surge Absorbers are UL, TUV,ROHS certified.