本规范涵盖了电气、电子通信和相关设备中使用的非表列可靠性（非ER）、确定可靠性（ER）或空间级、轴向引线精度、功率型、绕线式、环境工作温度为+25℃、在+250℃时降至零负载的固定电阻器的一般要求。这些电阻器的初始电阻公差为å±.5%、å±.1%和å±1%，电阻温度特性如表I所示。本规范涵盖的ER电阻器的故障率（FR）范围为每1000小时1%至0.001%（见1.2.1.5）。这些FR是在寿命试验（允许电阻变化为1。 0%）。用可焊端子非导电缠绕的电阻器由指定为“N”和“Z”的端子指定。字母“S”和“W”指定的端子与可焊和可焊端子感应缠绕（见1.2.1.2）。

This specification covers the general requirements for nonestablished reliability (non-ER), established reliability (ER), or space level, axial lead precision, power type, wire wound, fixed resistors having a +25 å¡C ambient operating temperature derated to zero load at +250 å¡C for use in electrical, electronic communication, and associated equipment. These resistors have initial resistance tolerances of å±.5 percent, å±.1 percent, and å±1 percent, and a resistance temperature characteristic as given in table I. ER resistors covered by this specification will have failure rates (FR) ranging from 1 percent to.001 percent per 1,000 hours (see 1.2.1.5). These FR are established at 60 percent confidence on the basis of life tests (permissible resistance change of 1.0 percent). Resistors which are noninductively wound with solderable terminals are designated by a terminal designated "N" and "Z". Terminals designated by the letters "S" and "W" are inductively wound with solderable and weldable terminals (see 1.2.1.2).