AN055
ESD Static Protection Manual
8
Figure 1-1. ESD Sensitive Symbols and ESD Protective Symbols
Symbol (1) ESD sensitive symbol. Inside the triangle is a hand drawn with a slash to touch.
This symbol is used to indicate that the electronic or electrical device or assembly is
susceptible to damage by an ESD event.
Symbol (2) ESD protection symbol. Unlike the ESD sensitive symbol, there is an arc
surrounding the triangle, and there is no slash on the hand. It is used to identify appliances
designed to provide ESD protection for ESD sensitive components and devices.
Symbols (1) and (2) are used to identify devices or assemblies containing ESD sensitive
devices, which must be handled differently. These symbols were proposed by the ESD
Association and described in EOS/ESD Standard S8.1, Electronic Industries Association (EIA)
Standard EIA-471 and IEC/TS 61340-5-1 and other standards.
Note:
The absence of an ESD warning label does not necessarily mean that the component
is ESD insensitive. When the electrostatic susceptibility of a component is suspected, it must
be treated as a sensitive device before conclusions can be drawn.
1.4.
Protective Materials
When in non-EPA, ESD sensitive devices must be protected from electrostatic sources.
Protective measures include conductive electrostatic shielding boxes, protective
covers/bags/packaging, etc.
Only in
EPA, ESD-sensitive devices can be removed from
ESD-protective packaging.
Learn the difference between three different types of protective packaging: static shielding
materials, antistatic materials, and static dissipative materials.
Static shielding packaging:
The barrier layer of the packaging will prevent electrostatic
discharge from penetrating the packaging and entering the internal components and causing
damage.
Antistatic material:
Low electrification material, which can be used as a cheap shock
