Best variable power supply

Finding your suitable variable power supply is not easy. You may need consider between hundred or thousand products from many store. In this article, we make a short list of the best variable power supply including detail information and customer reviews. Let’s find out which is your favorite one.

Product Features Editor's score Go to site
DC Power Supply Variable,0-30 V / 0-10 A Eventek KPS3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used For Spectrophotometer and lab Equipment Repair DC Power Supply Variable,0-30 V / 0-10 A Eventek KPS3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used For Spectrophotometer and lab Equipment Repair
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Yescom 110V AC 30V 10A DC Power Supply Precision Variable Digital Adjustable w Clip Cable Yescom 110V AC 30V 10A DC Power Supply Precision Variable Digital Adjustable w Clip Cable
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Tekpower TP3005T Variable Linear DC Power Supply, 0-30V @ 0-5A with Alligator Test Leads (110V Input) Tekpower TP3005T Variable Linear DC Power Supply, 0-30V @ 0-5A with Alligator Test Leads (110V Input)
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DC Power Supply Variable, Eventek KPS305D Adjustable Switching Regulated Power Supply Digital, 0-30 V 0-5 A with Alligator Leads US Power Cord DC Power Supply Variable, Eventek KPS305D Adjustable Switching Regulated Power Supply Digital, 0-30 V 0-5 A with Alligator Leads US Power Cord
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Lavolta 30V 5A Power Supply with Handle - Variable Regulated Adjustable Linear DC Lab Kit with Alligator Leads and US Power Cord Lavolta 30V 5A Power Supply with Handle - Variable Regulated Adjustable Linear DC Lab Kit with Alligator Leads and US Power Cord
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Tekpower TP3005N Regulated DC Variable Power Supply, 0-30V at 0-5A Tekpower TP3005N Regulated DC Variable Power Supply, 0-30V at 0-5A
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[Upgraded Version] SoulBay 30W Universal AC/DC Adapter Switching Power Supply with 8 Selectable Adapter Tips & Micro USB Plug, for 3V to 12V Household Electronics and LED Strip - 2000mA Max [Upgraded Version] SoulBay 30W Universal AC/DC Adapter Switching Power Supply with 8 Selectable Adapter Tips & Micro USB Plug, for 3V to 12V Household Electronics and LED Strip - 2000mA Max
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DC Power Supply Variable, Eventek 0-32V 0-10.2A Power Supply Adjustable Regulated Power Supply Digital with Alligator Leads US Power Cord DC Power Supply Variable, Eventek 0-32V 0-10.2A Power Supply Adjustable Regulated Power Supply Digital with Alligator Leads US Power Cord
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KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade
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Tekpower TP3005E DC Adjustable Switching Power Supply 30V 5A Digital Display Tekpower TP3005E DC Adjustable Switching Power Supply 30V 5A Digital Display
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Reviews

1. DC Power Supply Variable,0-30 V / 0-10 A Eventek KPS3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used For Spectrophotometer and lab Equipment Repair

Feature

DC Power Supply Adjustable: 0-30 volts and 0-10 amp outputs; the Back-lit LED display accuracy: 0.1 V and 0.01A
Constant voltage and current operation mode (C.C and C.V. automatic conversion); Light weight with heavy Output
Intelligent temperature control with built-in thermo-sensor, effectively reduce noise and prolong the life of product
Multiple protections: limit current protection, thermal protection, voltage overload protection, short-circuit protection
Eventek DC Power Supplies are FCC certified, 30 Days Money Back 12 Months Limited Guarantee for you !

Description

The Eventek KPS series high precision DC power supply is specially designed for scientific research, product development, laboratories, schools and electronic production lines.
The output voltage and current are continuously adjustable at nominal value. Featuring high accuracy, reliability, perfect overload and short circuit protection circuit, they can be an ideal choice for the industry.

Operating conditions:

- Input voltage: AC110V/220V10% (switch selection), 50Hz/60Hz
- Operating environment: 32 - 104F (0 - 40C), and humidity: 90%
- Storage environment: temperature: 4F-140F(-20C~60C), and humidity: 80%

Specifications:
- Output voltage: DC 0-30V Continuous adjustable
- Output DC Current: 0V - 10A
- Overall efficiency: 89%
- Display resolution: voltage: 0.1V , current 0.1A
- Voltage and Current adjustment
- Voltage regulation: CV 0.01% + 3mV, CC < 0.2% + 6 mA
- Protection: High current limiting and cooling fan
- Load stabilization: CV 0.1% +1mV / CC 0.1% +3mA
- Ripple and noises: CV < 1 mV rms, CC < 3 mA, rms
- Cooling way: Intelligent temperature control fan. if the temperature is higher than 50C
- Dimension: 8.8x 3.2x 6.5 Inch
- Unit Weight: 3.2pounds

What You Get:
Eventek KPS3010D Power supply host x 1
Output power cord x 2
Input power cord x 1
User manual x 1

Notice:

Do not operate in humid environment
Do not operate in flammable and explosive environment
Keep the product surface clean and dry

2. Yescom 110V AC 30V 10A DC Power Supply Precision Variable Digital Adjustable w Clip Cable

Feature

Durable steel case
Constant voltage and constant current operation mode (C.C and C.V. automatic conversion)
Multiple protections: over voltage (OVP), open circuit (OCP),over temperature (OTP)
Safe circuit design, high quality key components adopted, the power supply can be used in 24 hours with full load
Intelligent temperature control fan adjusts the speed according to the load situation, effectively reduce noise and prolong the life of fan

Description

Features:

- Durable steel case
- Constant voltage and constant current operation mode (C.C and C.V. automatic conversion)
- Multiple protections: over voltage (OVP), open circuit (OCP),over temperature (OTP)
- Safe circuit design, high quality key components adopted, the power supply can be used in 24 hours with full load
- Intelligent temperature control fan adjusts the speed according to the load situation, effectively reduce noise and prolong the life of fan

Specifications:

- Input voltage: 110V10% 60Hz
- Output voltage: DC 0-30V Continuous adjustable
- Output current: DC 0-10A Continuous adjustable
- Display resolution: voltage: 0.1V , current 0.1A.
- Display precision: 1% 1digit
- Voltage stabilization: 0.05% +1mV
- Current stabilization: 0.1% +10mA
- Load stabilization: CV 0.1% +1mV / CC 0.1% +10mA
- Ripples and noises: CV10mV(RMS)/ CC20mA(RMS)
- Cooling way:Intelligent temperature control fan. if the temperature is higher than 40F, the fan is started, if less than 95F, the fan will stop which can reduce noise
- Working conditions: 14F to 104F Relative humidity < 80%
- Storage conditions: -4F to 176F Relative humidity < 80%
- Body Dimension(LxWxH): 10 1/4" x 5" x 5 7/8" (26x12.6x14.8cm)
- Power Supply: 110V AC

Package Included:

- 1x DC power supply
- 1x Power Cord
- 1x Test Lead Set
- 1x User Manual

3. Tekpower TP3005T Variable Linear DC Power Supply, 0-30V @ 0-5A with Alligator Test Leads (110V Input)

Feature

High precision DC regulated power supply with 0-30 volts and 0-5 amp outputs
Two operational modes: constant voltage and constant current
Cooling fan automatic activation by built-in thermo-sensor
Back-lit LED Display with a 0.1V and 0.01A resolution
Authentic Tekpower brand, sold exclusively by Electronnix through amazon.com with 1-year manufacturer's warranty

Description

What is difference between Linear Power supply and Switching Power supply ?
Linear type is made by traditional wire transformer as the voltage conversion, It is Quiet and No noise, cost higher while the switching type is a transistor conversion which gives much noise and interference , but low cost and low quality.
The Tekpower TP3005T variable DC power supply is a compact linear type affordable instrument that is suitable for both Lab and industrial use. This digital DC power supply has maximum output voltage of up to 30 volts and current up to 5 amps. It comes with rotary switches for setting up the voltage and current. With its reliability and versatility, it's an invaluable and indispensable tool for testing, science project and etc., ideal for labs, research institutes, R & D facilities.
You can set CV and CC by pushing the Buttons, easy and stable.
Specifications:

Output DC Voltage: 0.0V - 30.0V
Output DC Current: 0.00V - 5.00 A
Input Voltage: 110/220 VAC, 50/60 Hz
Voltage and Current adjustment
Voltage regulation: CV < 0.01% + 3mV, CC < 0.2% + 6 mA
Load regulation: CV < 0.01% + 3mV, CC < 0.02% + 3mA
Ripple and noises: CV < 1 mV rms, CC < 3 mA, rms
Protection: High current limiting and cooling fan.
Operating Temperature: 0 - 102 F (0 - 40 C), Relative Humidity: < 80%
LCD Accuracy is within +/- 2.5%
Size: 10 x 5 x 7 inches
Weight: approx. 12 lbs

What's in the box:

TP3005TN power supply
Power cord
Test leads with alligator clips (28 inches long)
User manual

Tekpower is a registered trademark in the United States, any unauthorized use of our trademark is a violation of both Federal and State trademark laws and could subject to liability for damages and penalties.

Your feedback is not only important to us but also beneficial to other customers, therefore we'd like to invite you to submit a review.

4. DC Power Supply Variable, Eventek KPS305D Adjustable Switching Regulated Power Supply Digital, 0-30 V 0-5 A with Alligator Leads US Power Cord

Feature

DC Power Supply Adjustable: 0-30 volts and 0-5 amp outputs; the Back-lit LED display accuracy: 0.1 V and 0.01A , Could be used for electro etching
Constant voltage and current operation mode (C.C and C.V. automatic conversion); Light weight with heavy Output
Intelligent temperature control with built-in thermo-sensor, effectively reduce noise and prolong the life of product
Multiple protections: limit current protection, thermal protection, voltage overload protection, short-circuit protection
Eventek Power Supplys are FCC certified; 30 Days Money Back 12 Months Limited Guarantee for you !

Description

The Eventek KPS series high precision DC power supply is specially designed for scientific research, product development, laboratories, schools and electronic production lines.
Eventek KPS DC power supply could be used for electro etching
The output voltage and current are continuously adjustable at nominal value. Featuring high accuracy, reliability, perfect overload and short circuit protection circuit, they can be an ideal choice for the industry.

Operating conditions:

  • Dual Input voltage: AC 110V/220V10% (switch selection 115V in United States), 50Hz/60Hz
  • Operating environment: 32 - 104F (0 - 40C), and humidity: 90%
  • Storage environment: temperature: 4F-140F(-20C~60C), and humidity: 80%

    Specifications:
    - Output voltage: DC 0-30V Continuous adjustable
    - Output DC Current: 0V - 5A
    - Overall efficiency: 89%
    - Display resolution: voltage: 0.1V , current 0.01A
    - Voltage and Current adjustment
    - Voltage regulation: CV 0.1% + 3mV, CC < 0.5% + 6 mA
    - Protection: High current limiting and cooling fan
    - Load stabilization: CV 0.5% +1mV / CC 0.5% +3mA
    - Ripple and noises: 0.5%V P-P
    - Cooling way: Intelligent temperature control fan.
    - Dimension: 8.8x 3.2x 6.5 Inch
    - Unit Weight: 3.2pounds

    What You Get:
    Power supply host x 1
    Output power cord x 2
    Input power cord x 1
    User manual x 1

    Notice:

    Do not operate in humid environment
    Do not operate in flammable and explosive environment
    Keep the product surface clean and dry
    It has a switch to flip between 110v and 220v (when 220v,you get 24v max , and when 110v, you will get 30v)
    The unit was set to 220VAC input so the output voltage (when powered w/ 120VAC) was mucked up.
    Make sure to check it and if you are in the USA (or as applicable) set it to 120VAC.

    5. Lavolta 30V 5A Power Supply with Handle - Variable Regulated Adjustable Linear DC Lab Kit with Alligator Leads and US Power Cord

    Feature

    High precision DC power supply by Lavolta with US power cord
    Suitable for use in test and repair centres, labs and schools
    Voltage regulation 0-30V; current regulation 0-5A
    Automatic cooling fan, overload and short circuit protection
    All metal construction, compact design and carrying handle

    Description

    High precision regulated power supply
    The Lavolta Lab Power Supply can act as a voltage regulation or a current regulation power supply. The voltage regulation range is from 0V to 30V and the current range is from 0A to 5A. Output is set by rotary switches with the value displayed on a LCD display. It has low ripple and noise, high reliability and high accuracy. Test leads are included to connect to the power supply (banana plugs) and the load (crocodile clamps).

    Suitable for commercial, education and home uses
    Designed to be safe, accurate and easy to use, the Lavolta Lab Power Supply is a great choice for test teams, repair workshops, laboratories and research facilities. A rugged, reinforced metal frame, compact design and automatic safety overrides make it ideal for test benches, schools and home projects. The cooling fan, overload and short circuit protection all trigger automatically. An ergonomic carrying handle makes this Lavolta power supply easily portable.

    Technical specifications

    Input: 220V / 110V 10% 50Hz/60Hz (switch at the back)

    Operating conditions
    Temperature: 0C to 40C
    Relative humidity: < 80%

    Voltage regulation working condition
    Power stability: < 0.01%+3mV
    Load stability: < 0.01%+3mV (Max. current < 3A)
    Recovery time: < 100microseconds (load-variant 50%, min. load current 0.5A)
    Ripple & noise: <0 .5mVrms (5Hz-1MHz) (Max. current < 3A); < 1.0mVrms (5Hz-1MHz) (Max. current > 3A)
    Temperature coefficient: < 300PPM/C

    Current regulation working condition
    Power stability: < 0.2%+3mA
    Load stability: < 0.2%+3mA
    Ripple & noise: < 3mArms

    What's in the box
    1x DC power supply with US power cord
    2x test leads
    1x manual

    6. Tekpower TP3005N Regulated DC Variable Power Supply, 0-30V at 0-5A

    Feature

    High precision DC regulated power supply with 0-30 volts and 0-5 amp outputs
    Two operational modes: constant voltage and constant current
    Cooling fan automatic activation by built-in thermo-sensor
    Back-lit LED Display with a 0.1V and 0.01A resolution
    Authentic Tekpower brand, sold exclusively by Electronnix through amazon.com with 1-year manufacturer's warranty

    Description

    The TekPower TP3005N is a professional DC regulated power supply from TekPower. This is a highly stable, high quality switching power supply with its output continuously adjustable at 0-30V DC and 0-5A. The unit comes with a large LED displays, providing accurate readout for the voltage and current values. The cooling air fan will automatically start when the heat accumulated inside the case. It has a build in 4A fuse protection and comes with basic 1 year USA warranty.

    Features & Specifications:

    Adjustable outputs: 0-30V and 0-5A Variable controls for both current and voltage outputs
    Input voltage: 110V
    Regulation: CV <= 0.02% + 10 mV
    Load Regulation: CV <= 0.02% + 5mV,
    Ripple noise: CV <= 100 mVp-p
    Protection: Current Limit
    Environment: 0-40C, relative humidity < 80%
    Size: 3.4 X 6.3 X 9 inches
    Weight: 4 lbs
    Warranty: 1 year

    Package:

    TP3005N Power Supply unit
    Test leads with banana plugs and alligator clips
    1 User manual.
    Warranty Registration Card

    7. [Upgraded Version] SoulBay 30W Universal AC/DC Adapter Switching Power Supply with 8 Selectable Adapter Tips & Micro USB Plug, for 3V to 12V Household Electronics and LED Strip - 2000mA Max

    Feature

    Universal AC/DC Adapter - AC Input:100-240V 0.25A 50/60Hz, DC Output:3V/4.5V/5V/6V/7.5V/9V/12V. Advanced secure technique, with full PROTECTION of over Voltages/ over Current/ short Circuits/ over Temperature. [ BUY SoulBay NEW !!]
    Upgraded Version Power Supply - Made of Compact Material. Newly designed adapter plugs to make this adapter Plugged in More Easily, new 57.1 inches cable in length, adding a magnet ring and LED terminal connector. There is ALSO a Micro USB Plug so this item can also function as an adaptor to turn any USB cable into a charger, such as usb charging camera.
    All-in-one Adapter - This 30w replacement ac adapter comes with 8 interchangeable tips, which makes it fits 95% of AC/DC home appliances, Such as 3V to 12V Household Electronics, Tablet PC, Scales, Routers, Speakers, LED Strip Lights, CCTV camera system, USB Charging Camera, and so on.
    Multifunctional 30W Adapter - Variable voltage is easy to select, you can converts to different voltage with ease using the provided key. 5.5mm*2.1mm DC Power Cable Connector Plug, easy to connect and practical to use. Supporting DC 12V-2A or 12V-1.5A appliances.[Note: DC Plug Polarity: inner Positive(+), outer Negative(-), Polarity is Not reversible.]
    Exactly What You Are Looking for - Reasonably priced, versatile adjustable charger, different sizes of output and different levels of voltage. Safe to operate, Handy to set up at the correct voltage and Easy to attach the adapter plugs. Any issue for the product, please keep free to Contact us before returning. WE ALWAYS STAND BEHIND and OFFER fantastic after-sale support!

    Description

    Features:

    Idear for power supply replacement adapter, upgrade and spare power needs.
    New Cord, cable core made of copper, 5.5*2.1 mm turning fork attached on the cord + magnet ring to reduce the noise disturbance
    The cable length has been increased to 57.1 inches.
    Bran-new Adapter Plugs are More Flexible to keep it Plugged in.
    This SoulBay adapter includes 8 DC tips which are compatible with most polular DC products, such as Digital Photo Frame, Pedals, Effects, Wireless Receivers, Printers, Game Consoles, Raspberry Pi 3, Security Product, Router, Digital Product, Small Home Electronics, etc..

    Specification:

    Efficiency: >80%(TYP)
    USB Port: 5.0V 2.1A
    8 Adapter Tips Spec.: 5.5*2.5mm, 5.5*2.1mm, 4.0*1.7mm,3.5*1.35mm, 3.0*1.1mm, 2.5*1.7mm, Micro USB-B plug, led terminal connector.
    Package Weight: 205 gram ( 7.23 oz)
    Package Dimension: 12x7.5x5.6 cm/ 4.72x2.95x2.2 inch
    Cord Length: 145 cm( 57.1 inch/4.76 ft)

    Instructions:

    1.Connect the correct adapter tip and make sure that it's firmly attached to the dc input port of your device
    2.Set the right DC output voltage. There are 7 options for you, DC 3V/4.5V/5V/6V/7.5V/9V/12V
    3.Connect the adapter to the electrical socket
    4.Now you are ready to power up your device!

    Attention:

    Not compatible with laptop or other over 30W high power equipments.
    If you want to get 12V 2.0 A via the 8 DC tips, please don't use the USB port at the same time, or the current could not reach to 2.0A.
    If there is any product quality issue, or not sure whether this item would work for you, please keep free to contact us

    Package Included:

    1x 30W universal power adapter
    8 x DC tips

    8. DC Power Supply Variable, Eventek 0-32V 0-10.2A Power Supply Adjustable Regulated Power Supply Digital with Alligator Leads US Power Cord

    Feature

    DC Power Supply Adjustable: 0-32 volts and 0-10.2 amp outputs; the Back-lit LED display accuracy: 0.01 V and 0.001A.
    Constant voltage and current operation mode (C.C and C.V. automatic conversion); Light weight with heavy Output.
    Intelligent temperature control with built-in thermo-sensor, effectively reduce noise and prolong the life of product.
    Multiple protections: limit current protection, thermal protection, voltage overload protection, short-circuit protection.
    Eventek DC Power Supplies are FCC certified, 30 Days Money Back 12 Months Limited Guarantee for you !

    Description

    The Eventek KPS series high precision DC power supply is specially designed for scientific research, product
    development, laboratories, schools and electronic production lines.

    The output voltage and current are continuously adjustable at nominal value. Featuring high accuracy, reliability,
    perfect overload and short circuit protection circuit, they can be an ideal choice for the industry.

    Operating conditions:
    - Input voltage: AC110V/220V10%, 50Hz/60Hz
    - Operating environment: 32 - 104F (0 - 40C), and humidity: <80%RH
    - Storage environment: temperature: 14F-158F(-10C~70C), and humidity: <70%RH

    Specifications:
    - Output voltage: DC 0-32V Continuous adjustable
    - Output DC Current: 0-10.2A
    - Overall efficiency: 89%
    - Display resolution: voltage 0.01V , current 0.001A
    - Voltage and Current adjustment: CV 0.1% + 3mV; CC 0.1% + 3mA
    - Load stabilization: CV 0.1% +3mV ; CC 0.2% +3mA
    - Ripple and noises: CV 20mV (rms); CC 20mA (rms)
    - Fuse: 5x20mm, 3A
    - Protection: High current limiting and cooling fan
    - Cooling way: Intelligent temperature control fan. Start automatically if the temperature is higher than 50C.
    - Dimension: 8.6x 4x 5.7 Inch
    - Unit Weight: 4.4 pounds

    What You Get:
    1 x Eventek KPS3010DF Power supply host
    2 x Output power cord
    1 x Input power cord
    1 x User manual

    Notice:
    Do not operate in humid environment.
    Do not operate in flammable and explosive environment.
    Keep the product surface clean and dryKeep the product surface clean and dry.

    9. KORAD KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade

    Feature

    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

    Description

    This Linear power Supply packed with features and at a cost that can't be beat. It 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 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. SRA Soldering Products is the Exclusive Distributor and will handle warranty repairs after the first 30 days (for issues within 30 days contact Amazon directly). The warranty period is 1 year after shipment. Heating elements and soldering tips are not covered under warranty. Please contact [email protected] for service or spare parts or call 1-800-545-4750.

    10. Tekpower TP3005E DC Adjustable Switching Power Supply 30V 5A Digital Display

    Feature

    Output Voltage: 0- 30V DC with low ripple
    Output Current: 0-5A Current Output with low ripple
    Fine tune and coarse tune for precision adjustment
    It comes with Cable that makes easy to use, air fan to cool the machine for a long time working
    1 Year USA warranty

    Description

    The TekPower TP3005E is a professional DC regulated power supply from TekPower. This is a highly stable, high quality switching power supply with its output continuously adjustable at 0-30V DC and 0-5A. The unit comes with a large LCD displays with back light, providing accurate readout for the voltage and current values. The cooling air fan will automatically start when the heat accumulated inside the case. It has a build in 4A fuse protection and comes with basic 1 year USA warranty.

    Features & Specifications:

    Adjustable outputs: 0-30V and 0-5A Variable controls for both current and voltage outputs
    Input voltage: 110V
    Regulation: CV <= 0.02% + 10 mV
    Load Regulation: CV <= 0.02% + 5mV,
    Ripple noise: CV <= 100 mVp-p
    Protection: Current Limit
    Environment: 0-40C, relative humidity < 80%
    Size: 3.4 X 6.3 X 9 inches
    Weight: 4 lbs
    Warranty: 1 year

    Package:

    TP3005E Power Supply unit
    The Banana Cord
    1 User manual.
    Warranty Registration Card

    Conclusion

    By our suggestions above, we hope that you can found the best variable power supply for you. Please don't forget to share your experience by comment in this post. Thank you!