In the process of PCBA production, in order to prevent the components on the PCBA board from being broken by static electricity, strict electrostatic protection is required. According to the electrostatic sensitivity of the components, the electrostatic protection level of PCBA will be different.
Electrostatic sensitivity classification:
| Product type | Level | Electrostatic sensitive voltage |
| Extremely sensitive | Glass 0 | ESD<250V |
| Comparative sensitive | Glass 1 | ESD ≤ 2000V |
| 1A level 250-500V | ||
| 1B level 500-1000V | ||
| 1C level 1000-2000V | ||
| Generally sensitive | Glass 2 | 2000V ＜ESD ≤ 4000V |
| Medium sensitive | Glass 3 | 4000V ＜ ESD ≤ 16000V |
| 3A level 4000-8000V | ||
| 3B level 8000V ＜ESD ≤ 1600V | ||
| Non-static sensitive | Glass 4 | ESD >16000V |
Semiconductor component electrostatic sensitivity level:
| Product type | Level |
| MOSFET(Metal Oxide Semiconductor Field Effect Transistor) | Class 1 |
| Digital Transistor (Bias Resistor Transistor) | Class 2 |
| Diode (SKY, ZENER, SWITCH) | Class 3 |
| Bipolar Junction Transistor (NPN, PNP) | Class 4 |
| Thyristor | Class 4 |
The electrostatic sensitivity level of PCBA should be determined according to the electrostatic rating of the components. The most stringent level of electrostatic sensitivity of the components used is the electrostatic rating of PCBA and components.
