MIL-PRF-19500-304 Semiconductor Device, Diode, Silicon, Power Rectifier, Fast-Recovery Types 1N3885, 1N3886, 1N3888, 1N3890, 1N3891, 1N3893, 1N3890R, 1N3891R, 1N3893R And A-Versions Jan, Jantx, Jantxv, Jans, Janhc And JankcThis specification covers the performance requirements for 12 and 20 ampere, silicon fast recovery, power, rectifier diodes. Four levels of product assurance are provided for each encapsulated device type as specified in MIL-PRF-19500, and two levels of product assurance for each unencapsulated device type.