Resistors are one of the most widely used components in electronic circuits, and they are electronic components with resistance characteristics Usually referred to as a resistor Resistors are divided into fixed resistors and variable resistors (potentiometers), which play a role in voltage division, current diversion, and current limiting in circuits
1.1.2 Main technical parameters of resistors. What are the technical parameters of resistors?
1. The national standard specifies a series of resistance values, and the nominal resistance value refers to the resistance value indicated on the surface of the resistor For the convenience of production and selection At present, the nominal resistance series of resistors are E6, E12, E24 series, among which E24 series is the most complete Three series of nominal resistance values
As shown in Table 1.1 Table 1.1 Nominal Resistance Series Nominal Value Series Allowable Deviation of Resistors Nominal Resistance E24 Level I (± 5%) 1.01.11.21.31.51.62.02.22.43.03.33.63.94.34.75.15.66.26.87.58.29.1E12 Level II (± 10%) 1.01.21.51.82.22.73.33.94.75.66.88.2- E6 Level III (± 20%) 1.01.52.23.33.94.75.68.2 There is a certain deviation between the actual resistance value and the nominal resistance value for specific resistors The percentage deviation from the nominal resistance value is called the error of the resistor
The smaller the error, the higher the accuracy of the resistor