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LONGWEI

DC Power Supply Variable 30V 10A, 4-Digital LED Display, Precision Adjustable Switching Regulated Multifunctional Power Supply Digital with USB Interface, Disply with Output Power Lab Grade

    • Based on 356 reviews
Condition: New
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$42.99 Why this price?
Holiday Deal · 14% off was $49.99

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Availability: 20 left in stock
Fulfilled by Amazon
Arrives Saturday, Dec 28
Order within 5 minutes
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Color: Silver


Features

  • High Precision, Wide RangeLONGWEI DC power supply is a professional power supply regulation device that designed with crystal clear, backlit 4-digit LED display of voltage, current, and power. Precise accuracy: 00.01V and 00.01A. You can easily tune it within 0-30V and 0-10A. Very durable and easy to observe even in low light conditions.
  • 5V/2A USB interface& Auto Power CalculationWhat does the USB do? Please don't worry about run out of power now, you can charge your phone, repair phones and more through the 5V/2A USB interface. The hot selling point is that this power supply can calculate output voltage and current into power intelligently and displays the value on its large screen accurately. 110V / 220V input voltage can be switched and can be used worldwide.
  • High Quality with Essential SafetySafety is our priority. Grounding wire, The power supply takes the function of limited flow protection, overpower protection, over temperature protection, voltage overload protection. greatly improving its working efficiency and lifespan!
  • Excellent Heat DissipationEquipped with a big fan controlled by intelligent temperature control sensor and multiple heat radiation grooves on both sides, Intelligent fan offers excellent heat dissipation effect, which reduces the noise and prolongs the life of product effectively.
  • Various ApplicationThis one weighs less than 3kgs and measures only 11.2 x 5 x 5.7 inches, Applies for laboratory, school, home, electronic repair DIY, aging test and other requirements thanks to complete test probes and output cable with alligator clips. (Buy Now Risk-Free with 30 days Free Of Return,we provide 12-Month after sale service, lifetime technical support. Please feel free to contact us if you have any concerns,we will reply to you to solve your problem in 24H.)

Brand: LONGWEI


Color: Silver


Material: Crystal


Connector Type: USB 2.0


Input Voltage: 2.2E+2 Volts


Product Dimensions: 11.22 x 5.04 x 5.71 inches


Item Weight: 5.41 pounds


Manufacturer: LongWei Ltd.


Item model number: 3010DF-WHITE


Is Discontinued By Manufacturer: No


Date First Available: January 1, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Excellent starter power supply for prototyping
Color: Silver
The media could not be loaded. I am getting into some electronics and circuit design, primarily for DIY lighting with LED units and LED strips, but also some Arduino automation. I chose this unit for the following reasons: - Needed at least 10A @ 24V, this one is 10A at 30V which gives me a lot of headroom. - Coarse and Fine adjustments for both Voltage & Current - Constant regulation/limit for Voltage & Current - Has three banana clip/probe connections for positive/negative/earth ground (some only have pos/neg terminals). - In addition to displaying output in Volts and Amps, also has the power usage in Watts. Sure, I could just multiply Volts and Amps to get Watts, but having it instantly shown in the display trivializes a lot of decisions and planning in real time. (see video review) Observations: - After testing, I can confirm it seems to be reliable in terms of output matching its specifications. I tested on two LED strips, one 12V and one 24V and was able to power them cleanly and measure the draw in Amps/Watts at the dimmest min voltage and brightest max voltage levels. - The unit is lightweight, quiet and the controls are where you would expect them. - The red volt/amp/watt display is crisp, bright and easy to read, even in a well lit room. - The power switch is a nice push in/out toggle that has a really crisp/firm level of tension to turn on and off. - The adjustment dials are well dampened and do not feel cheap or flimsy. - As others have noted, the included banana clips and probes appear to be of good quality and I didn't feel the need to order better quality replacements. In summary, I am very happy with this purchase and would buy it again if I needed a second for another location at some point. This unit was about 20-30% more expensive than similar competing units, but I think it was worth it for the reasons I mentioned above. ... show more
Reviewed in the United States on April 22, 2019 by TechReviews
    • Works as described, basic PS for most tasks
Color: Silver
It's fairly accurate, easy to read(large LED digits), lightweight and does not take up too much bench space. It may not have true 3 or 4 place accuracy but for the money close enough. For example if you are using the constant current mode there is a roughly 1 second delay in activation at the lower milliamp range say 100ma for example. The fan does like to short cycle every so often even when unloaded but otherwise quiet operation. Having the power switch up front is very convenient. The included test leads seem of reasonable quality. The fine adjustment knobs do come in handy at times. ... show more
Reviewed in the United States on August 6, 2022 by Goody
    • This LogWei switching power supp[y is the best investment for the money
Color: Silver
The power supply is all metal case well stenciled controls,great bright displays,voltage,current and watts.The accuracy is fantastic at this price point level and I consider it a good lab investment for my home project testing.It appears to be very fault tolerant (break proof) by the user. I have ran it up on full voltage and loads and tested it for Ac rms noise riding on the dc line, and it more than meets the called out specs. It meets the demands as well as compares better than my lineir supply. Great job LongWei and your distributor that I bought it thru,fast service (one day ) .My rating is five stars across the board. ... show more
Reviewed in the United States on June 11, 2019 by Robert D.
    • .greet product
Color: Silver
Works perfect for small projects where mobility is a must
Reviewed in the United States on June 23, 2024 by Kaytlynn
    • Accurate so far
Color: Silver
Used to top balance my lifepo4 cells, it's worked great on multiple sets. I can set the voltage and amps to what I want for slow or fast charge. Set at 3.65v, measured 3.65v at the battery, I was impressed. When amperage fell to zero, i tested the cells and they were at 3.65v, so no complaints.
Reviewed in the United States on April 28, 2024 by Father
    • This is one horrible power supply
Color: Silver
Review Image by James Opera James Opera
Review Image by James Opera James Opera
If you are a spec jockey, this comes out on top. I wasn't expecting a lot and this is only for my camp. I find it the most annoying supply I've ever worked with. Even with fine pot I can't adjust it to within 100mv of what I want. This thing just jumps all around and not a little, hundreds of millivolts. I absolutely can't set this to 10V within 100mv. I dread turning it on! The four digit display is pure fiction. I tested it with my SWINGER 1 dynamic load tester with an alternating load. At just a 2A load the output is oscillating, the two dotted lines represent 1V peak to peak. I was expecting a little digital noise. Don't ever use this on a lithium battery or directly with LED. Amazing amount of hardware for the price, but its performance is unacceptable for even a beginner. ... show more
Reviewed in the United States on September 4, 2022 by James Opera James Opera
    • Appears to be Good Quality
Color: Silver
Everything appears to work well. I checked the accuracy with my Fluke 45 Bench Meter, and it is extremely close to the meter readings. The user interface is simple and intelligent. It took me a little while to get used to the constant current mode. First you set the voltage, next connect your circuit or device, then you adjust the current to a lower level, the constant current LED will illuminate, and the voltage will change to maintain that current. I tested the output with light bulbs and power resistors, and the power supply adjusted to, and maintained voltage at load throughout its entire range of current and voltages. The fan comes on at higher amperages, and turns off quickly when the current is reduced. I didn't pull the unit apart and look inside, as others have done, but I am inclined to agree that this seems to be a well built piece of equipment that should last. I will update my review if I encounter any problems. ... show more
Reviewed in the United States on October 29, 2019 by Gregory R. Hill
    • Genial
Color: Black
Super
Reviewed in the United States on June 6, 2024 by Genial, muy buen producto.

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