MIL-PRF-32663 Base Document:2020

This specification covers the general requirements for established reliability (ER), and space level, fixed, bulk metal foil (BMF), ultra-precision chip resistors primarily intended for incorporation into surface mount applications. These resistors have a high degree of stability with respect to time under normal conditions. ER resistors covered by this specification have life failure rates (FR) ranging from 1 percent to 0.001 percent per 1,000 hours (see 1.2.7). These FRs are established at 60 percent confidence on the basis of life tests. Table I provides a summary of performance characteristics for these resistors. Designers are CAUTIONED on using these resistors in high power pulse applications (see 6.7).