MASTECH TRIPLE DC LINEAR POWER SUPPLY 0-30 V @ 0-5A

by Acifica

Product Description

For sale is a brand new professional DC regulated power supply from Mastech, Model number HY3005D-3. This high quality power supply has three outputs: two outputs are continously adjustable at 0-30V DC and 0-5A, and the third output is fixed at 5V DC and 3A. What's more, the two outputs can be used either in independent, series or parallel mode, providing either two independent outputs, or one output with twice the voltage or twice the current output, up to 60V or 10A. The unit comes with 4 back-lit LCD displays, providing accurate and clearly visible readout for the voltage and current value. This unit has toggle switch at the back that allows you to operate it in 110V AC or 220V AC. retails well over $400. Please email us with any questions, our hard-working staff will answer every email in no time! *Two level of control for both current and voltage outputs: coarse and fine for ease of use *Dual adjustable outputs: 0-30V and 0-5A *Fixed output: 5V and 3A *Input voltage: 110V AC and 220V AC switchable *Line regulation: CV <= 0.01% + 2 mV, CC <= 0.2% + 2 mA> *Load Regulation: CV <= 0.01% + 3mV, CC <= 0.2% + 3 mA *Ripple noise: CV <= 0.5 mV RMS, CC <= 3 mA RMS *Protection: constant current and short-circuit protection *LCD reading accuracy: +/-1% for voltage and +/-2% for current *Environment: 0-40C, relative humidity < 90% *Size: 14" x 10" x 8" *Weight: 35 lbs *Warranty: 1 year

Product Details

• Shipping Weight: 30 pounds (View shipping rates and policies)
• ASIN: B000E14FL0
• Item model number: 3005D-3
• Average Customer Review: 3.3 out of 5 stars  See all reviews (3 customer reviews)
• Amazon Best Sellers Rank: #231,628 in Home Improvement (See Top 100 in Home Improvement)

Customer Reviews

Most Helpful Customer Reviews

2 of 2 people found the following review helpful:

1.0 out of 5 stars Works, but unacceptable performance, September 3, 2010

By 

lab guy - See all my reviews

This review is from: MASTECH TRIPLE DC LINEAR POWER SUPPLY 0-30 V @ 0-5A (Misc.)

Bought two of these. One channel failed after a few month of use, but that is not the main problem. A power supply like this is supposed to be used both in voltage mode and current limit mode. It shuts down if it is in current limit mode for more than seconds. That makes it hard to use to power LED strings for example. It is also single turn pots (the product description is just wrong here) so with 3/4 of a turn is 30 (or 60) volts, it is impossible to get say 5V. It will jump between 4.5 and 5.5 barely touching the dial.

The manual is useless, and it is undefined how it behaves when it needs to sink, not only source current.

Maybe these limitations is unimportant to some users, but then you could just buy a regular power supply, not a lab supply.

2 of 2 people found the following review helpful:

4.0 out of 5 stars Review of Power supply, September 29, 2008

By 

IDC (San Francisco, CA) - See all my reviews

This review is from: MASTECH TRIPLE DC LINEAR POWER SUPPLY 0-30 V @ 0-5A (Misc.)

High value, works fine. Fine tuning of outputs (V,I) is a bit difficult. The knobs are not detented and there is no fine tuning knob.

1 of 1 people found the following review helpful:

5.0 out of 5 stars Excellent product, September 28, 2007

By 

FFN "FUJIFILMNUT" - See all my reviews

This review is from: MASTECH TRIPLE DC LINEAR POWER SUPPLY 0-30 V @ 0-5A (Misc.)

Works as described. Great price. Be careful to avoid cheaper switching power supplies as they may overheat or burn out electronic devices. This unit is not a switching PS.