Price Industries 019455-108 SCR Controller 25A 3-Phase Silicon Controlled Rectifier

The Price Industries 019455-108 is a Silicon Controlled Rectifier (SCR) controller that provides proportional modulation to electric heaters throughout their full operating range, functioning as an electronic switch that controls large amounts of power to the load. This 3-phase model offers a maximum current rating of 25A and handles load power ranging from 120-480VAC.

Key Features:

• Zero Crossing technology enables soft start of electronic loads, eliminating power surges
• 24VAC power requirement (polarity sensitive)
• Aluminum heat sink for proper heat dissipation
• Proportional modulation ensures reliable, efficient, and silent operation
• Multiple control input options: 2-10V analog, 4-20mA analog, or pulsed 24VAC signals
• Standard modulating mode operation, with optional DAT (Discharge Air Temperature) sensor compatibility

This controller is commonly used in VAV (Variable Air Volume) terminal units and HVAC systems requiring precise electric heater control. The SCR technology provides superior performance compared to traditional mechanical contactors by offering smooth, stepless control of heating output while extending equipment life through reduced electrical stress.