The Phasetronics Single Phase Power Control 1P1-4875-C from Thermal Devices, an authorized Phasetronics distributor. Phasetronics Model 1P1 Series of single-phase SCR Power Controllers feature phase angle control to provide smooth proportional output power from 0 – 100%. The model 1P1 controllers are available with load current ratings ranging from 120 through 575Vac. These units are ideally suited for all resistive, inductive and lamp type loads. With a variety of standard pre-engineered options, they are the ideal choice for system designers, panel builders and end users.