TDG Holding Co., Ltd. engages in the research and development, manufacture, and marketing of electronic materials, digital devices, and smart equipment in China. The company offers electronic materials, such as ferrite sheets for NFC antennas; soft ferrite cores for wireless chargers and LED power supplies; soft magnetic cores for automotive electronics and EV wireless charging products, and energy products; cores for EMI suppression and consumer electronics; stress-insensitive, high bias, low core loss, and thermal shock resistance NiZn ferrites; metal powder cores; sapphire crystal products; and piezo-electric crystal materials. It also provides microwave components and modules, molding choke inductors, and electronic manufacturing services; and powder, and crystal material growth and process equipment. The company was founded in 1984 and is headquartered in Haining, China.