There are many types of resistors, but the wirewound resistors in these categories can be said to be our most common resistors, and the most used resistors in the line, and even the mainstream resistors of high-precision devices. Why is the winding resistance widely used and applied, which has a significant relationship with the use of research and development materials.

After continuous development and research and development of wirewound resistors, design engineers have experienced the research and analysis of various conductive materials and determined that the wirewound resistors made of materials such as constantan alloy, manganese-copper alloy and nickel-chromium alloy have good performance, stability and overload capacity.
 
At present, many resistor manufacturers use these resistor materials for production. These three kinds of winding resistance production materials have the following characteristics: 
 
1. Constantan alloy wirewound resistor
The winding resistance produced by the constantan wire is a relatively conventional production process. The resistance defect is heat resistance, but the temperature coefficient is not so good, which is related to the higher thermoelectromotive force of the constant copper.
 
2. The winding resistance of the nickel-chromium alloy material. This alloy material is a nickel-chromium-aluminum-copper alloy, which may also be referred to as a nickel-chromium-resistance alloy. The temperature coefficient is the smallest and the material is relatively hard, but the disadvantage is that it is not easy to weld.
   
The above is a commonly used alloy material for wirewound resistors. Currently, wirewound resistors are produced from copper-manganese alloy materials, which are mainly used for precision instruments, telecommunication instruments, electronic equipment, and the like. In the AC and DC circuit, the winding resistance acts as a voltage divider, a step-down, a shunt, and a load resistor.