SCR's: Model 18DZ, 1 Phase Zero Fired SCR Controllers provide infinitely variable control of single-phase AC Voltage loads Typcial applications include, resistive heating elements, Electric ovens or furnaces, Heat sealing, Drying Foam Cutting, Plastic Extruding and Molding, and all types Process Heating. If operated within the stated rating for current, voltage and temperature should run for millions and millions of cycles without failure and have no known MTBF or Life expectancy rating.

Advantages:

• Millions of Cycles
• No electromechanical Noise
• No moving parts
• Quite
• protection from chemicals and dust.
• High resistance to shock and vibration.
• No Arcing Contacts

Dis-advantages:

• Contact voltage drop "1 to 1.6 volts"
• Heat sensitive 50° C
• Heat producing
• Tolerance to voltage spikes.