a professional transformer manufacturer & EMS in China for more than 35 years

Zuoao is a professional EMS and power transformer manufacturer in China for more than 35 years. covers an area of 40, 000 square meters, currently has two production factories, one is specialized in PCBA, the other one is specialized in power supply product, with more than 500 employees.our main products are toroidal cores, all kinds of toroidal transformers and EI lamilated transformers, Our products are widely used in household appliances, smart home, energy storage, medical equipment, testing equipment, security monitoring, new energy power generation,, industrial control and other fields. We perform the ISO9001 and ISO14001 system, and implements ERP and MES management, and all materials meet RoHS requirements. And most products carry UL/cUL, CE, CSA, ETL, TUV, GS, CQC, approvals.