Designed for RS(EIA)-232.  Installed between equipment and cable to protect from surge caused by electrostatic discharge and switching surge.

Installed at both ends of the cable.

9-pin type available for PC use.

Breakdown voltage: 22V @ 1mA (L-SG).

Impulse life: 25,000V 500 pF 0Ω -- more than 5,000 times.