MIL-PRF-19500-308 Semiconductor Device, Diode, Silicon, Power Rectifier, Fast-Recovery Types 1N3909, 1N3910, 1N3911, 1N3912, 1N3913, R And A Versions Jan, Jantx, And JantxvThis specification covers the performance requirements for silicon, semiconductor fast recovery, power rectifier diodes. Three levels of product assurance are provided for each device type as specified in MIL-PRF-19500.