This noise level can be reduced by up to 10dB when the input rectifier bridges are configured with Fast Recovery Diodes (Trr = 100 nsec to 200 nsec) as they enable faster turn off resulting in lower peak recovery currents compared to standard...
Standard diodes in a variety of packages starting from M6 stud in top hat range to 3" in capsule types. In addition to rectifier diodes, a number of fast recovery diodes and other special devices with avalanche characteristics are available....