The MIL-STD-2073 gives instructions about how to package and label items that are electrostatic discharge (ESD) sensitive or electromagnetic interference (EMI) sensitive. But, how do you know if your item is ESD or EMI sensitive?

First, check the documentation that you received with the item and check for markings or stamps on the item itself.

Secondly, ask the item’s manufacturer.

Thirdly, you can always check to see if the government has already assigned a sensitive rating to the item by reviewing the item’s NSN. Pull up the NSN data and look for the Electrostatic Discharge Code, which will be listed on the NSN as the “ESDC”.

The ESDC will have one of the following designations:

• A – No known electrostatic discharge (ESD) or electromagnetic interference (EMI) sensitivity.
• B – Represents items with ESD sensitivity
• C – Represents items with EMI sensitivity
• D – Represents items with both ESD and EMI sensitivity.

More information about ESD and EMI items can be found in the DoD 4100.39-M, Volume 10.