MIL-PRF-39009-2 Resistors, Fixed, Wire-Wound, \(Power Type, Chassis Mounted\), Nonestablished Reliability, And Established Reliability, Styles Rer40, Rer45, Rer50, And Rer55This specification covers the associated requirements for nonestablished reliability and established reliability styles RER40, RER45, RER50, and RER55 resistors. These resistors are noninductively wound.