HY3005D / Mastech Variable Linear Lab Single-Output DC Power Supply 0-30V 0-5A Adjustable outputs: 0-30V and 0-5A.Input voltage: 230-240/50Hz.Ripple noise: CV <= 0.5 mV RMS, CC <= 3 mA RMS.

HY3020E / Mastech DC Power Supply 30V 20A Mastech HY3020E is a laboratory switching power supply equipped with one output channel and the ability to precisely and roughly adjust output parameters (current and voltage).