Resistance value is an important parameter in resistors, which mainly represents the specific numerical value of the substance that hinders the passage of current. As we usually refer to, the resistance value is the magnitude of the current blocking effect of a conductor. When choosing a resistor, we definitely need to consider the resistance value. So how do we look at the resistance value of a resistor? Below, the editor from Ouyou Electronics will introduce to you:

Resistance value labeling method:

1. Direct labeling method

The direct marking method is to directly mark the resistance value of a resistor on the resistor body with numbers and text symbols. The direct calibration method is mainly used for resistors with large volume (high power), and its allowable error is expressed as a percentage. The allowable error for resistors without calibration error is ± 20%. Direct labeling method

2. Textual symbol method

The text symbol method is to combine the nominal value and error of a resistor with numbers and text symbols according to a certain pattern and label them on the resistor body. In order to solve the problem of unclear or missing decimal points in numerical values, the text symbol method often uses units of resistance to replace decimal points, such as 5.7k marked as 5k73300M marked as 3G3, 0.1 Ω marked as R10, and 1 Ω marked as 1R5.

literal symbol system

3. Color code method

The color code method is to use color codes of different colors to represent resistance parameters. Color coded resistors (color ring resistors) can be divided into four ring and five ring marking methods. Color coding method

4. Digital Law

The digital method is a marking method that uses three digits to represent the nominal value on a resistor. The digits are from left to right, with the first and second digits being significant values and the third digit being the exponent, which is the number of zeros, measured in ohms. Deviation is usually represented by textual symbols.

Digital Law

The content introduced above is the method of measuring the resistance value of resistors. By using these resistance values, we can quickly see what the resistance value of the resistor is.