The power supply protection scheme

一、 Application environment
1. The thunderstorm weather frequently
2. Network communication equipment after the lightning strike damage is serious
3. The high grade of surge protection
 
二、 The scheme in this paper
1. This scheme USES a TVS, reaction speed, low residual.
2. Meet IEC61000-4-5 surge test standard, etc.
3. Through the firm level 1.2/50 IEC61000-4-5 mu mu s 2 Ω 1 s - 8/20


Scheme of protective circuit diagram:

 12V Power Protection Using 5.0SMDJ15CA

 24V Power Protection Using 5.0SMDJ15CA