Jansum Electronics Dongguan Co., Ltd. is located in Changping Town, Dongguan City.  We are a company specializing in R&D, manufacturing and sales of Ethernet transformer, Telecom transformer, Choke coils, Inductors,Power transformer, Planar transformer, Chip Lan magnetics, xDSL/T1/E1 transformer, Solar inverter inductor, and other magnetic components. The products sell well at home and abroad, and are exported to Europe, America, Southeast Asia, Middle East, Australia and other markets, and provide OEM/ODM services for domestic and foreign customers. We have such a full range of products categories, stable performance, and cost-effective,  that we have received consistent praise from customers. Our products are widely used in network switches, routers, ADSL, optic modem, set-top boxes, TV, monitoring equipment, network players, smart home,solar power inverter, EV charging equipment and other industries……