Schneider Electric (Viconics) R820-641-REV2 SCR Power Controller 24-347 VAC 45A

The Schneider Electric (Viconics) R820-641-REV2 Silicon Controlled Rectifier Power Control Module for controlling high current loads in HVAC systems. It is used in electric duct heaters, unit heaters, and reheat coils, and it improves energy efficiency and system responsiveness. It is designed for quiet operation, which results in less damage to mechanical components and has durable performance and longevity of equipment in commercial HVAC applications, and with this module it operates at 24-347VAC and supports up to 45A, and uses advanced SCR technology to precisely and efficiently modulate electric heating elements.