Our Dongya Electronic is professional to make low voltage&high voltage dc contactor,shunt &breaker for more than 40years. Our products are widely used in Telecommnications, EVs,BMS,Energy storage systems,charging systems,Mechanical Engineerings, Power Distributions,etc. Our main customers are Delta,Huawei,Vertive ,Siemens,Eaton,GE,CRRC and so on. Most of our contactor have UL /CE safty approval.