本规范涵盖了利用金属安装表面散热原理的功率型线绕固定电阻器的一般要求。电阻器的初始电阻公差为å±1%，电阻温度特性范围为30 ppm/å°C至200 ppm/å.°C，具体取决于电阻值。当交流（ac）特性至关重要时，它们不能应用；然而，已经做出了将电感最小化的规定。

This specification covers the general requirements for power type, wirewound, fixed resistors which utilize the principal of heat dissipation through a metal mounting surface. The resistors have an initial resistance tolerance of å±1 percent and a resistance temperature characteristic range from 30 ppm/å¡C to 200 ppm/å¡C depending upon the resistance value. They are not capable for application when the alternating current (ac) characteristics are of critical importance; however, provisions have been made to minimize the inductance.