MIL MIL-PRF-19500/533E

SEMICONDUCTOR DEVICE, DIODE, SILICON, VOLTAGE REGULATOR TYPES 1N6309 THROUGH 1N6355; 1N6309US THROUGH 1N6336US; PLUS C AND D TOLERANCE SUFFIX, JAN, JANTX, JANTXV, JANJ AND JANS (SUPERSEDING MIL-S-19500/533D) (S/S BY MIL-PRF-19500/533F)
standard by Military Specifications and Standards, 09/20/1999