Changzhou Guangda Electron Co., Ltd. ( Changzhou Jiangnan Discharge Tube Company Limited is the main professional discharge tube manufactory, in the domestic our product have been wildly used by the main MDF companies and been exported well to Europe. The Unite States of American, Middle East, Southeast Asia and our Hongkong and Taiwan. Our ceramic arrester series and semiconductor arrester series are mainly used for over-voltage protection of communication systems, power supply, cable television, computer, modem and other electronic equipments, seitching spark gaps are for ignition purposes, semiconductors are mainly used for military, spaceflight, shipping, railway, computer, household, electrical appliances meters, ect. They strictly meet the standards of ITU-TK. 12, K28, REA and GB9043, YD/T940. Diodes meet the requirement of IEC standard. We have been awarded the certificate of ISO9001:2000 Quality System and UL, TUV safety certificate. We will be strict to our quality management according to our objective " Prevent beforehand, Improve continuously, Creating magnificent", hunting for remarkable. We will manufacture the products with high quality to our customers depending on our long history experience and special technology. We will continuously improve our sales services and innovate new products for the satisfaction of our customers.