This specification covers the performance requirements for N-channel, depletion mode, silicon 2N4856 through 2N4861 J-FET (Junction Field Effect transistor). Four levels of product assurance are provided for each device (JAN, JANTX, JANTXV, and JANS) as specified in MIL-PRF-19500/385. RHA level designators "M", "D", "P", "L", "R", "F", "G" and "H" are appended to the device prefix to identify devices, which have passed RHA requirements.