1. Nominal resistance value: the resistance value marked on the resistor.

　　2, the allowable error: the nominal resistance and the actual resistance value of the difference with the nominal resistance value of the percentage of the ratio of the resistance value is called the resistance deviation, which indicates the accuracy of the resistor.

　　Allowed error and precision grade corresponding relationship is as follows: plus or minus 0.5% to 0.05, 00 (or), plus or minus 1% 0.1 + / - 2% - 0.2 (or zero), plus or minus 5% Ⅰ, plus or minus 10% Ⅱ, plus or minus 20% Ⅲ level

　　3, rated power: under the normal atmospheric pressure of 90-106.6KPa and the ambient temperature of -55 ° C ~ +70 ° C, the maximum power allowed to dissipate the resistor for a long time.

　　The rated power series of wire-wound resistor is (W) : 1/20, 1/8, 1/4, 1/2, 1, 2, 4, 8, 10, 16, 25, 40, 50, 75, 100, 150, 250, 500

　　The rated power series of non-wire-wound resistor is (W) : 1/20, 1/8, 1/4, 1/2, 1, 2, 5, 10, 25, 50, 100

　　The above is the whole content of "What are the main parameters of the plug-in resistance" introduced by Hengrenxing Technology plug-in resistance manufacturers, I hope it will be helpful to you!