--- product_id: 278208612 title: "KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…" brand: "korad" price: "1350 zł" currency: PLN in_stock: true reviews_count: 5 category: "Korad" url: https://www.desertcart.pl/products/278208612-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power store_origin: PL region: Poland --- # 30V continuous voltage range Dual 4-digit LED precision display 5A max current output KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade… **Brand:** korad **Price:** 1350 zł **Availability:** ✅ In Stock ## Summary > ⚡ Power Your Precision, Own the Lab ## 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?** 1350 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/278208612-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 - • **Built to Endure:** Heavy-duty linear design with low ripple & noise for reliable, long-term performance - • **Smart Cooling System:** Quiet, auto-adjusting fan keeps your power supply cool under heavy loads—no overheating worries - • **Crystal Clear Readouts:** Dual 4-digit LED displays ensure you never miss a detail, even from across the room - • **Global Ready & Protected:** Switchable 110/220V input with built-in overload, short circuit & over-temperature protection - • **Precision at Your Fingertips:** Continuously adjustable 0-30V voltage & 0-5A current for lab-grade accuracy ## Overview The KORAD KD3005D is a professional-grade, single-channel DC linear power supply delivering up to 30V and 5A with exceptional accuracy and stability. Featuring dual 4-digit LED displays, continuous voltage/current adjustment, and a quiet auto-speed cooling fan, it’s engineered for demanding lab, production, and educational environments. Its robust build includes comprehensive circuit protections and dual voltage input, making it a reliable, cost-effective choice for precision electronics work. ## Description This has an easy to read 4 digit LED is used to display the voltage and current values. This is a heavy duty single-channel, constant-voltage and constant-current Linear power supply with low ripple and noise, high reliability and high accuracy. The voltage and current are continuously adjustable. It is designed for use in labs, colleges and in production. This unit is priced about the same as lower cost 3 digit power supplies. Operating Conditions: Input voltage:110V +/-10% switchable to 220V +/-10% Frequency range: 50- 60HzOperating temperature: 32-104 F (0-40 ºC)Operating humidity: Storage temperature: 32-158 F (0-70 ºC)Storage humidity: Stable Voltage: Output Voltage Range: 0-30V Continuously adjustableSetup Resolution: 10 mVSetup Accuracy: Ripple: Read back Accuracy: 10 mVTemp. Coefficient: Read back Temp. Coefficient: Stable Current: Output Current Range: 0-5A Continuously adjustable Setup Resolution: 1 mASetup Accuracy: Ripple: Read back Accuracy: 1 mATemp. Coefficient: Read back Temp. Coefficient: Weight: 9.5 lbs. (4.3 Kg)Dimensions: 4.3 x 6.1 x 10.25 inches (110 x 156 x 260mm) Includes: user's manual, power cable and test leads 2 Year Warranty! Review: 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: The KORAD unit I received exhibited great performance, especially against its peers at similar price ranges. The first thing you'll notice when you pull it out of the box is, it's quite heavy. This is a good thing, the transformer inside the unit looks to be of good quality. The second thing you'll notice, if you apply an electronic load drawing the full 5 amps, is the unit will switch to constant current at 5A. The voltage may drop a little bit (few millivolts) but that's no big deal... you shouldn't run bench power supplies at full load anyways. I and a coworker tested the unit with an oscilloscope and a precise, calibrated electronic load. The voltage readout on the unit under load was bang on. The current readout was bang on. And the ripple, at ~30V drawing the full 5 amps, the maximum power for the unit... was 10 millivolts. This is amazing for such a low cost variable power supply. 10 millivolts ripple will allow you to power many high speed electronic systems with it, and it's cheap enough you can have multiple around to provide for various rails. Of course, it is outside the spec of some parts, but if you're developing with those parts, you will have the budget for more expensive gear to fit that spec. All in all, this is a VERY impressive hobbyist bench power supply, and I hope the quality never falls. They can charge double for this device, and it would still be worth it. I'm using it to power the 24v logic of the Teknic Clearpath SC servo system, and it works very well for that purpose. ## 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 | | ASIN | B00FPU6G4E | | Best Sellers Rank | #93,563 in Computers ( See Top 100 in Computers ) #809 in Computer Power Supplies | | Brand | KORAD | | Built-In Media | 5 Amp Test Leads, KD3005D Power Supplu, Power Cord, User Manual | | Compatible Devices | Personal Computer | | Connector Quantity | 1 | | Connector Type Used on Cable | IEC C13/C14 | | Cooling Method | Air | | Current Rating | 5 Amps | | Customer Reviews | 4.5 4.5 out of 5 stars (345) | | Customer reviews | 4.5 4.5 out of 5 stars (345) | | Date First Available | 21 October 2013 | | EU Spare Part Availability Duration | 1 Years | | Fan Size | 120 Millimeters | | Form Factor | Standalone | | Global Trade Identification Number | 00022099136323 | | Is Discontinued By Manufacturer | No | | Item Dimensions | 35.6 x 25.4 x 25.4 centimeters | | Item Type Name | Power Supply | | Item Weight | 9 Pounds | | Item model number | KD3005D | | Manufacturer | Korad | | 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 | | Power Supply Design | Non-Modular | | Product Dimensions | 35.56 x 25.4 x 25.4 cm; 4.08 kg | | System Bus Connector Type | 6 Pin | | UPC | 787721204039 | | Unit Count | 1 Count | | Upper Temperature Rating | 104 Degrees Fahrenheit | | Wattage | 150.00 | ## Product Details - **Brand:** KORAD - **Compatible devices:** Personal Computer - **Connector type:** IEC C13/C14 - **Model name:** KD3005D - **Output wattage:** 300 Watts ## 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 ### ⭐⭐⭐⭐⭐ Review *by T***R on 1 December 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! ### ⭐⭐⭐⭐⭐ Review *by N***Z on 25 June 2019* The KORAD unit I received exhibited great performance, especially against its peers at similar price ranges. The first thing you'll notice when you pull it out of the box is, it's quite heavy. This is a good thing, the transformer inside the unit looks to be of good quality. The second thing you'll notice, if you apply an electronic load drawing the full 5 amps, is the unit will switch to constant current at 5A. The voltage may drop a little bit (few millivolts) but that's no big deal... you shouldn't run bench power supplies at full load anyways. I and a coworker tested the unit with an oscilloscope and a precise, calibrated electronic load. The voltage readout on the unit under load was bang on. The current readout was bang on. And the ripple, at ~30V drawing the full 5 amps, the maximum power for the unit... was 10 millivolts. This is amazing for such a low cost variable power supply. 10 millivolts ripple will allow you to power many high speed electronic systems with it, and it's cheap enough you can have multiple around to provide for various rails. Of course, it is outside the spec of some parts, but if you're developing with those parts, you will have the budget for more expensive gear to fit that spec. All in all, this is a VERY impressive hobbyist bench power supply, and I hope the quality never falls. They can charge double for this device, and it would still be worth it. I'm using it to power the 24v logic of the Teknic Clearpath SC servo system, and it works very well for that purpose. ### ⭐⭐⭐⭐⭐ Review *by V***7 on 14 February 2021* La caja venía golpeada no estaba bien asegurada pero la fuente está en buenas condiciones y funcionando al 100 ## 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.pl/products/278208612-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power](https://www.desertcart.pl/products/278208612-korad-kd3005d-precision-variable-adjustable-30v-5a-dc-linear-power) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-05*