
Microphone, English: A microphone is an energy conversion device that converts sound signals into electrical signals. As a device that comes into contact with the human body, it poses an ESD electrical hazard.
The maximum standard signal value for microphone circuits is usually 5.5 Vp-p, with a maximum frequency below 10kHz. At this frequency, the capacitance of the suppressor does not need to be considered.
Protection plan:

|
Part number |
Working Voltage DC |
VC |
IR |
C |
|
ESD040208P030 |
8V |
45V |
1µA |
0.3pf |

|
Part number |
VRWM V |
IR µA |
VBR(Min) V |
IT mA |
IPP A |
PPk W |
C pF |
package |
|
ESD8V0APB |
8 |
1 |
8.5 |
1 |
20 |
300 |
150 |
SOT-23 |

This scheme complies with IEC61000-4-2 air 15KV contact 8KV
ESD protection can use discrete multilayer varistors or diode arrays.