MIL-PRF-20M涵盖了既定可靠性（ER）和非ER温度补偿固定电容器的一般要求，主要用于因温度变化而需要补偿的电路应用、旁路和耦合应用。满足本文规定的ER要求的电容器的故障率水平（FRL）范围为每1000小时1.0%到每1000小时0.00l%。根据规定的寿命试验参数，将这些故障率水平确定为90%的置信水平，并保持在10%的置信水平- 生产商的风险百分比。使用8:1的加速系数将适用高温下200%额定电压下的寿命试验数据与适用高温下的额定电压联系起来。百万分之一（ppm）质量体系用于记录和报告按照本规范供应的电流变电容器的平均出厂质量。制造过程中需要统计过程控制（SPC）技术，以最大限度地减少按照本规范要求供应的ER电容器的生产变化。

MIL MIL-PRF-20M covers the general requirements for established reliability (ER) and non-ER, temperature compensating, fixed capacitors for use primarily where compensation is necessary for circuit applications due to temperature changes, in bypass and coupling applications. Capacitors meeting the ER requirements specified herein have a failure rate level (FRL) ranging from 1.0 percent per 1,000 hours to 0.00l percent per 1,000 hours. These failure rate levels are established at a 90-percent confidence level based on the life test parameters specified and are maintained at a 10-percent producer's risk. An acceleration factor of 8:1 has been used to relate the life test data at 200 percent of rated voltage at the applicable high test temperature to the rated voltage at the applicable high test temperature. A part per million (ppm) quality system is used for documenting and reporting the average outgoing quality of ER capacitors supplied to this specification. Statistical process control (SPC) techniques are required in the manufacturing process to minimize variation in production of ER capacitors supplied to the requirements of this specification.