The winder resistor is a type of resistor with a resistive wire to be treated on an insulating package on an insulating frame. It has the characteristics of small temperature coefficients, good stability, and high precision. It is generally suitable for high temperature and high-power occasions.It is necessary to distinguish between a normal resistor, how to choose the winder resistor?
First, depending on the resistance and error
The resistance is selected: the principle is that the nominal resistance value of the resistor used is, the smaller the difference between the resistor resistance value of the desired resistor.
Error selection: Time constant RC circuit desired to be small as small as possible. Generally, it can be selected from 5%. For the decoupling circuit, the feedback circuit filter circuit load circuit is not too high. Optional 10% -20% resistance.
Second, according to the resistance of the resistor
Rated voltage: When the actual voltage exceeds the rated voltage, even if the power requirements are met, the resistor will be broken down.
Rated power: The rated power of the selected resistor should be greater than twice the actual tolerance to ensure the reliability of the resistor in the long term of the circuit.
The above is to select the winding resistor method