---
product_id: 1298627
title: "KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…"
brand: "korad"
price: "€ 295.07"
currency: EUR
in_stock: true
reviews_count: 9
category: "Korad"
url: https://www.desertcart.es/products/1298627-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power
store_origin: ES
region: Spain
---

# 30V max output voltage Dual 4-digit LED precision display 5A continuous current KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…

**Brand:** korad
**Price:** € 295.07
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Precision, Protect Your Innovation!

## Quick Answers

- **What is this?** KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade… by korad
- **How much does it cost?** € 295.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/1298627-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power)

## Best For

- korad enthusiasts

## Why This Product

- Trusted korad brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Robust:** Heavy-duty metal build with excellent heat sinking fits neatly on your desk without compromising durability.
- • **Built-In Safety First:** Overload, short circuit, and over-temperature protections keep your projects and gear safe.
- • **Precision at Your Fingertips:** Ultra-fine voltage and current adjustments down to 0.01V and 0.001A for lab-grade accuracy.
- • **Seamless Global Compatibility:** Auto-switching 110/220V input means you’re ready to power up anywhere.
- • **User-Friendly Digital Controls:** Intuitive knob with digit selection and panel lock prevents accidental changes—perfect for busy workspaces.

## Overview

The KORAD KD3005D is a compact, lab-grade DC linear power supply delivering up to 30V and 5A with digital regulation. Featuring dual 4-digit LED displays, precise voltage/current control, and comprehensive circuit protections, it’s engineered for professionals demanding reliable, safe, and accurate power in a sleek, durable package.

## Description

Buy KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…: Power Supplies - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Surprisingly accurate - My unit checked out very close to my fluke 87V. It's easy to adjust and will do 5a constant with no problem. Great for the price.
Review: Perfect home supply - I looked at a lot of supplies and bought this one based on the reviews. As a retired engineer, I'm used to using the high-end stuff, but $500+ is a little much for home use. The $30-$50 units seemed too cheap and the reviews certainly reflect that. The first thing I did when I got this was to pull the cover off. I was impressed with the assembly. Good practice was used. The cables are laced (always a good sign of care being taken), the transformer is huge and the heat sinking looks good. I don't have access to a schematic, so there is no way to evaluate the design, but the innards look great. The controls exceeded my expectations and are very easy to use. The voltage displays in units of .01V and current in units of .001A. Of course, the accuracy is not that good (and doesn't need to be) but you can tweak the settings easily for fine control as needed. To adjust either, just turn the knob. Pressing the knob changes which digit it's changing (10's of volts, 1's of volts, 0.1's of volts or 0.01's of volts). Ditto for current. Note that the knob clicks but it isn't always perfect. So, for instance, to change a setting on the fly, I may select the next unit down and come at the new setting by using 10 clicks instead of one. I'll describe how to use the supply in constant voltage mode. True constant current mode is rarely used, so I won't spend any time on that. To start out, unhook all the outputs. The GND terminal is nothing more than earth ground carried though from the AC line card. It is usually good practice to connect the ground to whatever is consider "common". (Yes, I know about ground loops and the need to sometimes avoid them, but for digital work that is rarely an issue). For most of what we do, common is the "-" post, so hook it to ground. This is easy to do by using some hookup wire and making a jumper using the holes in the posts that you see when you unscrew them a little ways. Now turn on the supply and set the voltage to what you need (for example, 5.0V). Adjust the current to something you think is perhaps twice the expected current needed. This will help protect your circuitry in case something is hooked up wrong. If you now press and hold the current knob until the OCP light comes on, you will set the supply to shut down if the current limit is exceeded. If you don't do this and too much current is being drawn, the supply will enter constant current mode and just reduce the voltage to whatever is needed to push out the current set by the current limit adjustment. If this is caused by an incorrect hookup, you may at this point be frying your circuit. OCP will help prevent that by shutting down the supply. You may still end up blowing something out, but the chances are less. If the supply shuts down, you can start it up again by just tweaking the voltage knob a bit. After things are set up, press and hold the voltage knob until the panel lock comes on. This will prevent anyone (such as little curious hands) from accidently changing your settings. The meters are dual purpose. When you are turning a knob, they show the voltage or current limit setting. After a moment, they go back to reading out the current and voltage being output from the supply. I haven't evaluated parameters like regulation, accuracy, ripple, etc. If I see anything unexpected I'll update this post. Just remember the meters are not accurate to 4 digits but are pretty good (better than 1%). There is utility in having more resolution than precision. For instance, you may want to look for small current changes. My hat's off to the designers for setting them up this way. It is useful if you understand the limitations. I think it is good practice not to push any low priced supply to the design limit. I bought the 5amp model with the intention of never using it to supply more than a few amps. Current is the killer for supplies and being conservative will help it last a long time, I hope.

## Features

- Compact Design with Dual 4 Digit LED Displays and Digital Controls - Switchable power input 110/220v
- Circuit protection for over load, short circuit and over temperature.
- Automatic switching between mA and A display

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FPU6G4E |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #51,753 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #32 in Lab Power Supplies #64 in Life Science Supplies |
| Customer Reviews | 4.4 4.4 out of 5 stars (362) |
| Date First Available | May 19, 2012 |
| Included Components | 5 Amp Test Leads, KD3005D Power Supplu, Power Cord, User Manual |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 9 pounds |
| Item model number | KD3005D |
| Manufacturer | Korad |
| Material | Metal |
| Part Number | KD3005D |
| Product Dimensions | 14 x 10 x 10 inches |
| Style | KD Series - 5 Amp |
| Wattage | 150.00 |

## Product Details

- **Brand:** KORAD
- **Compatible Devices:** Personal Computer
- **Connector Type:** Banana Jack (DC Output), AC Plug (AC Input)
- **Cooling Method:** Air
- **Form Factor:** Standalone
- **Item Weight:** 9 Pounds
- **Item dimensions L x W x H:** 14 x 10 x 10 inches
- **Model Name:** KD3005D
- **Output Wattage:** 300 Watts
- **Wattage:** 150.00

## Images

![KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade… - Image 1](https://m.media-amazon.com/images/I/61kld3kAxFL.jpg)

## Questions & Answers

**Q: Is this the "fixed" model? The one EEVblog tested in July failed, but apparently Korad has made improvements.  See http://www.eevblog.com/forum/blog/eevblog-404-korad-psu-followup/**
A: I ordered on Oct. 5, 2020.  Mine appears to be another revision.  The power board has one large cap, but newer transistors with a different layout and with surface mount components.  The interface board appears to be another revision too.  Both boards appear different than the original board and the revision shown on EEVBlog.  Have yet to test this, though.

**Q: it comes with the wires?**
A: Yes it comes with hookup adapters banana plug to alligator clips and the power cord.

**Q: Does this supply have programmable current limiting?  Can you, for example, set a limit of 500mA?**
A: It isn't really programmable by my definition, but it has a manual control that allows the course/fine limiting of current.  (The knob on the right)    It is also a push to hold your settings button.

**Q: Does anyone know how to put this into constant current mode?  I don't know if I'll ever actually use it this way but I am curious to see if it works.**
A: Set what you want for the current. Then set your voltage 3 volts higher than what you require. It should go into constant current mode. If not, slowly increase the voltage until you go into constant current mode. The light next to CC should be lit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Surprisingly accurate
*by B***B on December 30, 2025*

My unit checked out very close to my fluke 87V. It's easy to adjust and will do 5a constant with no problem. Great for the price.

### ⭐⭐⭐⭐⭐ Perfect home supply
*by A***E on April 29, 2014*

I looked at a lot of supplies and bought this one based on the reviews. As a retired engineer, I'm used to using the high-end stuff, but $500+ is a little much for home use. The $30-$50 units seemed too cheap and the reviews certainly reflect that. The first thing I did when I got this was to pull the cover off. I was impressed with the assembly. Good practice was used. The cables are laced (always a good sign of care being taken), the transformer is huge and the heat sinking looks good. I don't have access to a schematic, so there is no way to evaluate the design, but the innards look great. The controls exceeded my expectations and are very easy to use. The voltage displays in units of .01V and current in units of .001A. Of course, the accuracy is not that good (and doesn't need to be) but you can tweak the settings easily for fine control as needed. To adjust either, just turn the knob. Pressing the knob changes which digit it's changing (10's of volts, 1's of volts, 0.1's of volts or 0.01's of volts). Ditto for current. Note that the knob clicks but it isn't always perfect. So, for instance, to change a setting on the fly, I may select the next unit down and come at the new setting by using 10 clicks instead of one. I'll describe how to use the supply in constant voltage mode. True constant current mode is rarely used, so I won't spend any time on that. To start out, unhook all the outputs. The GND terminal is nothing more than earth ground carried though from the AC line card. It is usually good practice to connect the ground to whatever is consider "common". (Yes, I know about ground loops and the need to sometimes avoid them, but for digital work that is rarely an issue). For most of what we do, common is the "-" post, so hook it to ground. This is easy to do by using some hookup wire and making a jumper using the holes in the posts that you see when you unscrew them a little ways. Now turn on the supply and set the voltage to what you need (for example, 5.0V). Adjust the current to something you think is perhaps twice the expected current needed. This will help protect your circuitry in case something is hooked up wrong. If you now press and hold the current knob until the OCP light comes on, you will set the supply to shut down if the current limit is exceeded. If you don't do this and too much current is being drawn, the supply will enter constant current mode and just reduce the voltage to whatever is needed to push out the current set by the current limit adjustment. If this is caused by an incorrect hookup, you may at this point be frying your circuit. OCP will help prevent that by shutting down the supply. You may still end up blowing something out, but the chances are less. If the supply shuts down, you can start it up again by just tweaking the voltage knob a bit. After things are set up, press and hold the voltage knob until the panel lock comes on. This will prevent anyone (such as little curious hands) from accidently changing your settings. The meters are dual purpose. When you are turning a knob, they show the voltage or current limit setting. After a moment, they go back to reading out the current and voltage being output from the supply. I haven't evaluated parameters like regulation, accuracy, ripple, etc. If I see anything unexpected I'll update this post. Just remember the meters are not accurate to 4 digits but are pretty good (better than 1%). There is utility in having more resolution than precision. For instance, you may want to look for small current changes. My hat's off to the designers for setting them up this way. It is useful if you understand the limitations. I think it is good practice not to push any low priced supply to the design limit. I bought the 5amp model with the intention of never using it to supply more than a few amps. Current is the killer for supplies and being conservative will help it last a long time, I hope.

### ⭐⭐⭐⭐⭐ Perfect for what I need at home.
*by F***H on May 18, 2015*

I'm very happy with this unit; it's a great value for the price. I have labs available when I need them; I mostly work from home on embedded systems firmware and this supply is ideal. I've had this in pretty much daily use for 2 months now. Apart from one concern (below) I'm quite pleased with it. I wound up taking the skin off to try and solve a problem. It confirmed what I already knew from other reviewers, namely that the construction isn't of super high quality. Internally the frame is constructed of fairly soft metal rails and it takes hardly any force to strip the screws that attach the skin to the frame. All the screws were provided and in place though one lock-washer was missing. The problem that lead to opening the unit up was that, after the first 10 or 12 times pushing the Voltage knob to switch the scale of adjustment the knob ran out of play (no tactile feedback). For a short while it worked if I gripped the rear of the unit and pushed hard. Finally there was nothing doing. After accessing the back of the front panel I balked at disassembling it but fortunately it turned out that the front knob is just a friction-fit on the post of the encoder. So instead of adjusting the encoder, I carefully pried the knob off, added a shim to the end of the encoder shaft that I trimmed from the sticky end of about 6 post-it-notes. That created enough clearance between the knob and the face of the front panel that it operates perfectly now and the fit of the knob on the shaft is still plenty tight. I checked the output voltage under a small load over voltage with an uncalibrated Fluke 189. The difference between the front panel reading and the Fluke it's generally within +/-0.5%. Front panel display has also been consistent with informal current measurements in the 3 mA +/- about 1% range. I deliberately tripped the overcorrect protection circuit and it works as advertised. Don't really have the facilities to make meaningful measurements of power on/off transients so I avoid this when a circuit is connected. Only one thing worries me. Every 2 to 10 hours or so it makes a short (~ one half second) buzzing sound; kind of a 60 Hz noise. I've never been able to react quickly enough to see if I can feel a vibration and I've never scoped the output when this happens. Haven't noticed the display fluctuate either but that could also be due to reaction time. Curious if anyone else has run across this. Will update in the future if I find anything significant about this.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-21*