or send us an e-mail to:

The MASTECH HY3020E VARIABLE DC POWER SUPPLY has variable 0 to 30 volts at 0 to 20 AMP.  The voltage is variable from 0 to 30 volts and the current is also variable from 0 to 20 amps. The digital LED meters display the actual voltage and current within 2 percent. Both the voltage and the amperage are adjustable with COARSE and FINE tuning controls for absolute BEST precision.

Excellent for multiple regulated power requirements with variable 0-30 volt 0-20 amp output. Other uses include lab, science projects or any other use where stable voltage up to 30 volts is required.


  • Output Voltage : 0- 30V @ 0-20A
  • Switching Power
  • Output Current :0-20 A
  • Input Voltage: 110V, 60Hz
  • Constant Voltage / Constant Current
  • Voltage and Current Variable
  • Power effect: CV<0.01%+1mV, CC<0.2% + 1mA
  • Overload effect: CV<0.01% +3mV, CC<0.2% +3mA
  • Waves and noises: CV<2mV r.m.s, CC <10mA, r.m.s
  • Protection: constant current and short-circuit protection
    CV≤0.1%+5mV(I>6A) CC≤0.5%+20mA(I>6A)
  • Voltage indication accuracy: LED±1%+2digits, analogue display 2.5%
  • Current indication accuracy: LED±2%+2digits, analogue display 2.5%
  • Load regulation :
  • CV≤0.02%+10mV(I≤6A) CC≤0.5%+10mA(I≤6A)
  • CV≤0.1%+5mV(I>6A) CC≤0.5%+20mA(I>6A)
  • Ripple & Noise: CV≤3mVr.m.s CC≤10mA r.m.s
  • Digital Voltage and current meters built in with Voltage resolution:
    2.5% of display reading;
    2.5% of Current resolution: display reading
  • Environmental : 0 - 102 F ( 0 -40 C)
  • Relative humidity: <90%
  • 1 years warranty
  • Size: 14 1/4" X 10 1/4" X 6 1/2"
  • Weight: 20 lbs / 9 kg
  • 6 months Warranty

$229.95 + $29.95  S/H/I For domestic 48 state US shipments via UPS Ground.
No shipments to AK, HI, PR, VI, Guam, PO Boxes or APO addresses

variable dc power supply, power supplies - hy3020e

This is a SWITCHING power supply and it does NOT work for all applications
that a LINEAR would be appropriate.

Some of the applications that a SWITCHING power supply does NOT work for include Electroplating, Anodizing, Battery Charging and Chemical Experimentation. 

For these applications we recommend the LINEAR version of these power supplies:
HY3010D, HY3020D and the HY5005D-2


Monday - Friday: 9 AM - 5 PM EST

FOR INFORMATION CALL: 954-727-1832 or send us an e-mail to:

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