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MIL-PRF-19500, the General Specification for Semiconductor Devices, establishes the general performance requirements for semiconductor devices. Detail requirements and characteristics are specified in the performance specification (Slash) sheet. Revisions to this and performance specification sheets are structured to assure the interchangeability of devices of the same part type regardless of manufacturing date code or conformance inspection (CI) completion date. Five quality levels for encapsulated devices are provided for in this specification, differentiated by the prefixes JAN, JANTX, JANTXV, JANJ, and JANS. Seven radiation hardness assurance (RHA) levels are provided for the JANTXV and JANS quality levels. These are designated by the letters M, D, L, R, F, G, and H following the quality level portion of the prefix. Two quality levels for unencapsulated devices are provided for in this specification, differentiated by the prefixes JANHC and JANKC.

Resistors

Military specification (mil spec) resistors have been used in nearly every defense, and industrial applications also in a good deal of surface electronics as well. This is true because these high-grade resistors are capable of performing dependably at the high temperatures encountered in extreme environments.

There are dozens of mil spec resistor styles, and dozens of applicable mil spec or mil performance spec documents. The better mil spec grades have Established Reliability, with the best having a known failure rate not exceeding .001% per 1000 hours. Many are also characterized for operation to 175�C, with the power degraded by half at 125�C from the 70�C values.

Military Semiconductor Cross reference Guide