Ningbo Zhengmao Electronics Co., Ltd. is located in Ningbo, a port city in Zhejiang Province, China. Our company is specializing in researching and developing, producing, and selling components used in telecommunication, electron and electric power. We can supply all types and standards of metal ceramic gas discharge tubes and switching spark gaps. Our company has a building covering an area of more than 6,000 square meters. Our facilities and testing equipment are advanced, using high technology.

Our ceramic gas discharge tubes have complete varieties and standards with strong current. With current resistance, small capacitance, rapid response, and discharge voltage stabilization, our ceramic gas discharge tubes have no light sensation effect and do not contain any radioactive material, and are a kind of optimal lightning strike and over-voltage protection device which is widely applied to telecommunication fitting exchange equipment, telephone sets, electrical equipment and surge protection for power distribution systems. Switching spark gaps have more extensive applications.

Our products satisfy the ITU-T K.12 recommended standards and the technical requirements stipulated in BSEN61643-311:2001. Our company has attained the certification of ISO9001 and our gas discharge tubes have attained TUV certification issued by German TUV. Meanwhile, we are always ready to design and manufacture all kinds of discharge tubes and switching spark gaps with different outline dimensions, current grades, performance indexes and operation requirements, specifications and models for new and old customers.