--- product_id: 1298627 title: "KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…" brand: "korad" price: "€ 288.91" currency: EUR in_stock: true reviews_count: 9 category: "Korad" url: https://www.desertcart.fi/products/1298627-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power store_origin: FI region: Finland --- # Adjustable 0-30V, 0-5A output Smart cooling fan with auto speed Dual 4-digit LED displays KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade… **Brand:** korad **Price:** € 288.91 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with precision and peace of mind! ## 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?** € 288.91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/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 - • **Power Flexibility:** Seamlessly switch between 110V and 220V inputs to match your workspace anywhere in the world. - • **Lock & Load Safety:** Panel lock feature prevents accidental setting changes—perfect for busy labs or shared workspaces. - • **Whisper-Quiet Cooling:** Intelligent fan adjusts speed based on load, keeping the unit cool and silent during marathon sessions. - • **Built to Last & Protect:** Robust circuit protection guards against overload, short circuit, and overheating—work worry-free. - • **Precision at Your Fingertips:** Dual 4-digit LED displays deliver ultra-clear voltage and current readings for exact control. ## Overview The KORAD KD3005D is a compact, lab-grade DC power supply offering adjustable 0-30V and 0-5A output with dual 4-digit LED displays. It features automatic switching between mA and A readings, built-in circuit protections, and a smart cooling fan that adapts to workload. Designed for professional and hobbyist use, it supports 110/220V input and includes safety features like panel lock and grounding, making it a reliable, long-lasting choice for precision electronics work. ## 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: After a week of use it was still cool to the touch and started right back up on ... - I purchased this DC power supply specifically to build a silver refining electrolysis machine to refine old junk silver into .999 pure silver. So far I have refined over 200 oz's of silver with this power supply and have not any issues or problems. I ran this unit non stop for over a week and it worked flawlessly. After a week of use it was still cool to the touch and started right back up on the next batch of silver I refined. The unit arrived very quickly and was very well packaged. The box looked like it just came off the assembly line and right to my door! There are many different power supplies that are available, but I think this is probably the best value for your buck. Some of the feature I like with this power supply: 1. The best feature is that it has a cooling fan at the rear of the supply. This really helps keep internal components cool which is important if you are using it in a warm area with limited cooling. The fan is very quiet and will automatically adjust fan speed depending on the power load. This is one of the main reasons I chose this supply over many others. 2. The unit is easy to operate and comes with a decent instruction manual written in English. 3. The display is bright and easy to read your setting even from a distance. 4. The knobs to adjust the power settings feel good and solid. 5. It has a grounding connection which some other supplies do not have. 6. The unit shipped with alligator clips (3 feet) 7. Heavy duty single channel power supply with continuously adjustable voltage and current. 8. 120/220v selector switch in the back of the unit. If you are in the market for an adjustable DC power supply I highly suggest you give this product a try, you won't be disappointed! I expect that it will last for a very long time as it has proven itself already many times. If you have any questions please feel free to ask! 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 | | Best Sellers Rank | #45,477 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #28 in Lab Power Supplies #57 in Life Science Supplies | | Brand | KORAD | | Built-In Media | 5 Amp Test Leads, KD3005D Power Supplu, Power Cord, User Manual | | Compatible Devices | Personal Computer | | Connector Type Used on Cable | Banana Jack (DC Output), AC Plug (AC Input) | | Cooling Method | Air | | Current Rating | 5 Amps | | Customer Reviews | 4.5 4.5 out of 5 stars (364) | | Form Factor | Standalone | | Global Trade Identification Number | 00022099136323 | | Item Dimensions | 14 x 10 x 10 inches | | Item Type Name | Power Supply | | Item Weight | 9 Pounds | | Manufacturer | Korad | | Maximum Input Voltage | 121 Volts (AC) | | Mfr Part Number | KD3005D | | Minimum Input Voltage | 110 Volts | | Model Name | KD3005D | | Model Number | KD3005D | | Output Wattage | 300 Watts | | System Bus Connector Type | 6 Pin | | UPC | 787721204039 | | Unit Count | 1.0 Count | | 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 ### ⭐⭐⭐⭐⭐ After a week of use it was still cool to the touch and started right back up on ... *by T***R on December 1, 2014* I purchased this DC power supply specifically to build a silver refining electrolysis machine to refine old junk silver into .999 pure silver. So far I have refined over 200 oz's of silver with this power supply and have not any issues or problems. I ran this unit non stop for over a week and it worked flawlessly. After a week of use it was still cool to the touch and started right back up on the next batch of silver I refined. The unit arrived very quickly and was very well packaged. The box looked like it just came off the assembly line and right to my door! There are many different power supplies that are available, but I think this is probably the best value for your buck. Some of the feature I like with this power supply: 1. The best feature is that it has a cooling fan at the rear of the supply. This really helps keep internal components cool which is important if you are using it in a warm area with limited cooling. The fan is very quiet and will automatically adjust fan speed depending on the power load. This is one of the main reasons I chose this supply over many others. 2. The unit is easy to operate and comes with a decent instruction manual written in English. 3. The display is bright and easy to read your setting even from a distance. 4. The knobs to adjust the power settings feel good and solid. 5. It has a grounding connection which some other supplies do not have. 6. The unit shipped with alligator clips (3 feet) 7. Heavy duty single channel power supply with continuously adjustable voltage and current. 8. 120/220v selector switch in the back of the unit. If you are in the market for an adjustable DC power supply I highly suggest you give this product a try, you won't be disappointed! I expect that it will last for a very long time as it has proven itself already many times. If you have any questions please feel free to ask! ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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. ## Frequently Bought Together - KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade… - BOJACK 1000 Pcs 25 Values Resistor Kit 1 Ohm-1M Ohm with 5% 1/4W Carbon Film Resistors Assortment --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fi/products/1298627-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power](https://www.desertcart.fi/products/1298627-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-05-16*