MCC Zener diodes, transient voltage suppressors, and most rectifiers are all ESD non-sensitive up to 15,999V per the human body model test as defined in MIL-STD-740, method 1020. Therefore special handling or packaging conditions are not required. Schottky rectifiers of 1A minimum ratings, and many low power signal or switching diodes using very small die elements can be ESD sensitive in the range of 4,000V to 15,999V when referencing the Human Body Model test, thus making them a class 3 device. They also do not require special handling or packaging per MIL-PRF-19500, Appendix E. Smaller, lower current rated Schottky rectifiers may require special handling.