Ningbo Sangni Electronics Co., Ltd. was established in 1989 as the PTC components manufacturer with the combination of scientific research, production and marketing, and has passed the ISO9000 Quality Management System Certification. Cooperating with the Institute of Electrics, Chinese Academy of Sciences and Kashing Industrial Co., Ltd.(JP), Ningbo Sangni Electronics Co., Ltd. in addition to advanced production, testing, testing equipment and production technology, and boasts the capacity of PTC materials secondary R&D, design and production.