... ,ISO JBK5 series Transformers / Power Transformer / Toroidal Transformer ·JBK5 series transformer used in machine control exchange 50-60hz ... Usage:They are used in various machinary equipments,including:normal electric control power,signal light power,etc.·Mini ... in producing Transformer,Circuit Breakers,Voltage Regulators,Switching Power Supply,Surge Protectors,Electrical Boxes,Reactors,Resistors ...