What is GCA (Gate Control Arrestor)?
New generation SPD utilize the GCA (Gate Control Arrestor) that come from merged merits both past-used 3-pole tube and present Arrestor, whose merits is much lower Let-through Voltage than existing SPD.

Classify

3-Pole discharge tube

Arrestor

Gate Control Arrestor

Picture or Diagram

Purpose
Amp, radio, etc
Data/CATV/CCTV/RF SPD
AC/Data/CATV/CCTV/RF SPD
Merit
Adjustable output power by Grid control
Capable a few kA discharging
Adjustable output power by Grid control, and capable a few kA discharging
Disadvantage
Only a few current (mA) available
Impossible to control a starting point of discharging
Need to precise control circuit

Special Feature

Presently, not used
Impossible to use as a compomnent of AC SPD
SurgeLab developed GCA component as the world first, and now manufacturing all types of SPD like as AC/Data/CATV/CCTV/RF and etc.