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Variable DC Power Supply

There are two main designs for variable regulated DC power supplies: Linear DC Power Supply and Switching DC Power Supply.

When choosing between a linear or switching DC power supply, you main consideration is maximum Voltage and Amperage you need; and noise level you can accept. If your required amperage is higher than 20A, your only choice is switching power supplies. If less than 20A, you can get either linear or switching DC power supply. For most applications, any of our models should suffice. If you have a special application that requires very clean output, then consider linear DC power supplies as they have less ripple noise. In general, we recommend the models with Volteq brand, as they are our updated models with over-voltage protection, and are more robust than the original Mastech versions that were designed more than 20 years ago.

We offer a large selection of variable DC Power Supplies, which are sometimes called benchtop power supplies, Lab DC Power Supplies, adjustable DC power supplies, etc.. All of our models are regulated variable DC power supplies, which means that their outputs are stable and adjustable. They can be used for a very wide range of applications including general scientific and engineering applications, bench top testing, circuit board testing, repair shops, advanced battery charging including fast charging Lithium batteries, electroplating, fuel cell applications, anodizing, electrolysis, hydrogen generator, DC motors, slot cars, etc.


Choosing power supplies by construction methods:

Linear DC Power Supply HY3003D-3
Switching DC Power Supply HY3020E
Typical applications include:
  • low noise amplifiers
  • signal processing
  • data acquisition
  • automatic test equipment
  • laboratory test equipment
  • control circuits


Typical applications include:
  • general purpose use
  • high power / high current applications
  • electroplating and anodizing rectifiers
  • battery charging
  • electrolysis, hydrogen generator, fuel cell etc.
  • DC motors, slot cars, aviation applications, etc.
  • LED and solar cell testing



Choosing power supplies by special applications:

Variable DC power supply HY3020EX
Switching DC Power Supply HY3050EX
Switching Variable DC Power Supply HY3050EX













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