Semiconductor current regulator "RT-4".
Service devices.Semiconductor current regulator "RT-4" was produced presumably since 1989 by Zaporozhye PO "Transformer". The current regulator "RT-4" is designed for smooth regulation of the heating intensity of household electric heating devices, such as irons, hair dryers, soldering irons, hot plates and others, as well as for smooth regulation of the brightness of the glow of light sources, such as various lamps, floor lamps, table lamps and others. ... The operating voltage at which the optimal operation of the regulator is ensured is 220 V. The regulator's power is from 40 to 1000 W. The adjustment range is from 0 to 220 V. The efficiency is 0.98. The dimensions of the device are 200x100x65 mm. Weight 600 g. Price 8 rubles.
