Changzhou Tanglong Electronics Co., Ltd. is a producing company engaged in the production and development of semiconductor devices. The company is located in the beautiful Changzhou City, Jiangsu Province, and is a modern industrialized city between Shanghai and Nanjing, which is also the hometown of Hua Luogeng - an outstanding Chinese Mathematician.

There are complete specifications in its products, including various series, such as STD, FR, HER, SF, SKY, HV, TVS and ZENER as well as various packaged diodes including A-405, DO-41, DO-15, DO-27, DO-34, DO-35, R-1, R-3, R-6, SMA, SMB, SMC, etc. All of them are used in lighting, computers, communications, small household appliances, automotive electronics and other industries.