Daily Archives: December 30, 2005

UTP lightning protection schematics

First of all examine APC (American Power Conversion) LAN surge protector. It is removed from some APC UPS. The circuit is very simple. Diodes D1-D4 and D6-D9 are IN4006. The D5 diode is more interesting. It is 1.5KE6.8CA. This is … Continue reading

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