本规范的主要功能是涵盖符合MIL-STD-704的飞机电气系统中使用的28 VDC手动复位免跳闸电弧故障/热断路器的一般要求。作为次要功能，本规范可能涵盖直接安装在结构上时，用于除飞机以外的主要车辆的AFCB的一般要求。

The primary function of this specification is to cover the general requirements for 28 VDC manual reset trip-free arc fault/thermal circuit breakers for use in aircraft electrical systems confirming to MIL-STD-704. As a secondary function, this specification may possibly cover the general requirements for AFCBs for use in primary vehicles, other than aircraft, when mounted directly to the structure.