Industrial AZL19C509R Heavy Duty MOV Arrester VariStar

The Cooper AZL19C509R VariStar Heavy Duty MOV Arrester is a surge-protection device for industrial electrical systems, delivering rapid response to transient overvoltages with a 9 kV rating and a 7.65 MCOV (Maximum Continuous Operating Voltage). It is part of the VariStar line and is designed for heavy-duty service in demanding environments, helping shield connected equipment from damaging voltage spikes. By diverting surge energy away from protected circuits, this MOV arrester supports reliable operation of power distribution and control systems. The AZL19C509R specifies this exact configuration within the VariStar family, enabling engineers to match protection to their installation. Typical applications include protecting industrial switchgear, distribution panels, and other equipment exposed to transient overvoltages on AC power networks.