Best Variable Power Supply in 2022 [*Top Picks*]

Looking for the best variable power supply on the market? We’ve got you covered. Check out our ratings of absolute bestsellers below and make a final decision.

2874 Reviews Scanned

  • Kungber DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V/2A USB Output, Coarse and Fine Adjustments with Alligator Leads
    Bestseller #1
    Kungber DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V/2A USB Output, Coarse and Fine Adjustments with Alligator Leads (112)
      High Precision with 4-Digit and Power Display: Kungber 30V 10A DC benchtop power supply is a professional power supply regulation device that has a high resolution of 0.01V and 0.01A. You can easily tune it within 0-30V and 0-10A. The backlit 4-digit LED display provides a more accurate readout for the voltage and current value, visible easily even in the low-light conditions. Constant Voltage (C.V.) & Current (C.C.) Mode Automatic Conversion: Easy to dial in the desired voltage and current with the coarse and fine adjustment knob. The constant voltage/current mode can automatically switch with load changes. The conversion of constant voltage and constant current is indicated by the LED display on the front panel. Compact and Various Application: This DC power supply is less than 3 lb and measures only 9.5 x 3.4 x 6.1 inches, applies for laboratory, school, repair, electrolyzation, electroplate, brush plating, lamp test, aging testing, battery charge, home DIY and other requirements. 5V/2A USB Interface could charge your cellphone and provide power for the device which you want to repair, no worry about running out of power. Reliable and Safety: Many safety measures are adopt in Kungber DC bench power supply- Grounding wire, Leakage protection, Thermal protection, Voltage overload, Power overload and Short-circuit protection. Kungber power supply use premium electronic components, provide reliable working status and prolong the life of product effectively. When the working temperature is more than 122℉/50℃,the intelligent thermal protection will active the cooling fan to lower the temperature according to the load. What You Get - 1 x Kungber SPS3010 Variable DC Power Supply, 1 set of Output Power Cords , 1x Input Power Cord, 1 x User Manual, and Technical Support from Kungber.
  • DC Power Supply Variable,0-30 V / 0-10 A LW-K3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used for Spectrophotometer and lab Equipment Repair
    Bestseller #1
    DC Power Supply Variable,0-30 V / 0-10 A LW-K3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used for Spectrophotometer and lab Equipment Repair (54)
      ◆【High Precision, Wide Range】LONGWEI DC power supply is a professional power supply regulation device that designed with crystal clear, backlit 3-digit LED display of voltage, current, and power. Precise accuracy: 00.1V and 0.01A. You can easily tune it within 0-30V and 0-10A. Very durable and easy to observe even in low light conditions. ◆【High Quality with Essential Safety】Safety 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 Dissipation】Equipped 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 Application】This one weighs less than 2kgs and measures only 2.7*8.6*6.3inches, Applies for laboratory, school, home, electronic repair DIY, aging test and other requirements thanks to complete test probes and output cable with alligator clips. ◆【What You Get】1 x K3010D DC power supply, 1 x output power cord, 1 x Input power cord, 1 x test probes, 1 x User manual. (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.)
  • SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm
    Bestseller #1
    SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm (503)
      Input: AC 100~240V, 50/60Hz ; Output: DC 3~24V Adjustable, Max 3A 72W ; It can supply with any voltage between 3~24V,such as 3V 4V 4.5V 5V 5.5V 6V 9V 12V 14V 15V 19V 20V 24V, etc and any amp less than 3A, such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A. LCD display will show the output voltage, in case that wrong voltage regulation damage your device. It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector. You can screw wires onto it easily, perfect for DIY projects. The 72W all-in-one multipurpose AC/DC adapter fit for many 3~24V small household electronics such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, Wifi camera, USB Hub, hard disk box, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc. Built-in multiple safety protection systems. Automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. We focus on producing premium quality and safety power adapters. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use. Please choose correct voltage before plug it to your device. Wrong voltage may damage your device. We recommend to use less than 80% of the full load. We always stand behind our products. If there is any issue, please feel free to contact us. We have 30 days money back guarantee, 18 months exchange.
  • DC Power Supply Variable, Adjustable Switching Regulated Power Supply (0-30 V 0-10 A) with 4-Digits LED Display, 5V/3.6A USB Quick-Charge Interface, Short Circuit Alarm, Coarse and Fine Adjustments
    Bestseller #1
    DC Power Supply Variable, Adjustable Switching Regulated Power Supply (0-30 V 0-10 A) with 4-Digits LED Display, 5V/3.6A USB Quick-Charge Interface, Short Circuit Alarm, Coarse and Fine Adjustments (85)
      【Automatic Power Calculation】 Different from other dc power supplies, WANPTEK DPS3010U dc power supply can automatically calculate the power value according to the voltage and current, but also can simultaneously display the 4-digit voltage, current and power values, numerical accuracy of 0.01V and 0.001A. 【5V/3.6A USB Interface】The variable power supply has built-in fast charging protocol identification chip that supports USB fast charging function, which is different from the ordinary USB charging interface in that it has a 5V/3.6A output that can quickly charge your mobile phones and or other devices or be used to charge the device to be repaired. 【Short Circuit Alarm】In order to improve the safety of the dc power supply and prolonging its service life, we have designed a short circuit alarm for the dc power supply. When a short circuit occurs, the variable DC power supply will stop output and send out an alarm to remind you. Bench power supply also have safety protections such as overvoltage, overcurrent, overheating and overload. 【Wide Applications】The adjustable power supply features an intelligent temperature-controlled fan and heat sink for excellent heat dissipation and is especially suitable for laboratory, electronic repair DIY, communication equipment maintenance, products line, scientific research and teaching units. 【Packaging and After-Sales】1 x power host, 1 x output power cord, 1 x input power cord, 1 x user manual, We provide lifetime technical support. If you are not satisfied with the product you received, please feel free to contact us.
  • DC Power Supply 30 V 5 A , Adjustable Switching Regulated Power Supply with 4-Digit LED Display,110V/220V Variable Power Supply with Alligator Leads Desoldering
    Bestseller #1
    DC Power Supply 30 V 5 A , Adjustable Switching Regulated Power Supply with 4-Digit LED Display,110V/220V Variable Power Supply with Alligator Leads Desoldering (27)
      〖Higher Sensitivity & Precisionă€—ïŒšAdjustable 30V 5A DC Power Supply is designed for laboratories, schools.Its output voltage and output current could be continuously adjusted between zero and nominal value. It can precisely sense the location of voltage and current Good power stability and ripple coefficient, it can precisely sense the location of voltage and current. 〖Excellent Heat Dissipation〗: Equipped with a big fan controlled by intelligent temperature control sensor and multiple heat radiation grooves on both sides, The 30V/5A DC power supply can quickly disperse heat during operation, greatly improving its working efficiency and lifespan! 〖Multiple Protectionsă€—ïŒšIn order to improve the safety of the dc power supply and prolonging its service life, we have designed a short circuit alarm for the dc power supply. When a short circuit occurs, the variable DC power supply will stop output and send out an alarm to remind you. DC power supply also have safety protections such as overvoltage, overcurrent, overheating and overload. 〖Wide Applicationsă€—ïŒšThe DC power supply features an intelligent temperature-controlled fan and heat sink for excellent heat dissipation and is especially suitable for laboratory, electronic repair DIY, communication equipment maintenance, products line, scientific research and teaching units. 〖Package Includedă€—ïŒš1 * DC Power supply host , 1 * Output power cord , 1* Input power cord , 1 * User manual.High quality material adopted and make it more stable output, small volume, light weight, easy to carry and move and easy operation
  • DC Power Supply Variable, 30V 10A Bench Power Supply with 4-Digits LED Display, USB Interface, Adjustable Regulated Switching Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button
    Bestseller #1
    DC Power Supply Variable, 30V 10A Bench Power Supply with 4-Digits LED Display, USB Interface, Adjustable Regulated Switching Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button (19)
      【High-precision encoder knob】Different from general knobs, this DC power supply has a precise encoder knob. You can press the knob to switch each digit, and then turn the knob to customize each digit in the range of 0-9. Set the voltage or current you want more accurately. 【Output Enable/Disable Button】In the process of using the bench power supply, Output button can prevent us from forgetting to turn off the output and causing damage to the load. Just press this button to turn on or turn off the output of the power supply. This makes it more convenient for you to use the power supply. 【Overcurrent Protection】When the OCP function is turned on, if the load equipment is short-circuited during operation, the adjustable power supply will automatically stop output and send a buzzer to alert the user. Protect the adjustable power supply and load from damage. 【Precise 4-digit LED Display】The variable power supply with a high-definition 4-digit display, which can display three values of voltage, current and power at the same time. The data is accurate to 0.01V and 0.001A. The bright white digital display helps you to operate as usual in the dark, and you can adjust the brightness of the screen as needed. 【Compact and Lightweight】The measures of the variable dc power supply is only 7.51*3.56*5.81inch and the weight is only 2.47 pounds, which saves more space on your workbench and is convenient for you to carry when you need it. NANKADF dc power supply is the best choice for beginners or professional electricians.
  • DNYSYSJ Adjustable DC Regulated Power-30V 20A DC Power Supply Supply Variable-Regulated DC Bench Power Supply with LED Display
    Bestseller #1
    DNYSYSJ Adjustable DC Regulated Power-30V 20A DC Power Supply Supply Variable-Regulated DC Bench Power Supply with LED Display (22)
      【ADVANTAGE】Novel design, strong and durable, portable handle, easy to handle. Constant voltage, constant current automatic conversion, can be uesd as a constant voltage source, can also be used as a constant current source. 【PRODUCT CHARACTERISTICS】The Adjustable DC Regulated Power has plastic panel, beautiful and generous. Hand-held design, easy to carry. Voltage and current are adjusted roughly and finely to adjust voltage and current accurately. 【TEMPERATURE CONTROL】Temperature control, according to the load speed adjustment, effectively reduce the noise, prolong the life of the fan. Perfect protection functions, adjustable overvoltage protection (OVP), short circuit current limiting protection (OCP), overtemperature protection (OTP), overpower protection (OPP). 【LINEAR ADJUSTMENT MODEL】PWM switch pre-voltage regulation, MOS linear adjustment mode, high effciency, energy saving and envirronmental protection, SMT process, more stable performance. The circuit design is reasonable, the key components are imported and can be used at full load for a long time. 【WIDE APPLICATION】Aging test of factory products: such as DC motor, DVD, audio, resistor, capacitor and other products. Battery Charging Industry: Perfect application in battery charging industry, first provide constant current charging, then convert to constant voltage trickle current charging, or set overvoltage protection, implement automatic charging, full automatic stop.
  • 60V 5A DC Bench Power Supply Variable 3-Digital LED Display with CC/CV Mode- Free Alligator Leads for Repair, Lab, DIY Tool, Electronic Research, Powering Ebike, Tinkering
    Bestseller #1
    60V 5A DC Bench Power Supply Variable 3-Digital LED Display with CC/CV Mode- Free Alligator Leads for Repair, Lab, DIY Tool, Electronic Research, Powering Ebike, Tinkering (16)
      🎯60V DC VARIABLE DC REGULATED POWER SUPPLY📗- 0-60 volts and 0-5 Amp outputs with 3 LED digital BRIGHT display , easy to read the number, with resolution of 0.1 V100mV)and 0.01A(10mA), It's easy to set the voltage, short the wire leads, and set the current. 🎯 C.C & C.V.MODES AUTO CONVERSION📗-It's easy to adjust your desired voltage and current with coarse and fine turning knob. The constant voltage and current mode automatically switch over with load changes. 🎯HIGH QUALITY& STABILITY📗-High quality circuit board made, and make it stable output.It's built-in cooling fan with thermo-sensor and TWO heat sinks used will keep the power supply cool,noise reduced and life prolonged.Perfect limit current protection, thermal protection, voltage overload protection, short-circuit protection. 🎯WIDE APPLICATIONS📗- High performance applications, suitable for testing/troubleshooting many 48VDC equipment elements and components,.It's nice for electronic maintenance, electrolysis, electroplate, battery charger, laboratory, teching, and DIY tools. Good 🎁 gift for DIY electronic gears. 🎯 WHAT YOU WILL GET AND ENJOY📗- 1*quality standard 4mm Alligator Clip Leads with Banana Plug 20 inch length;1* US power cord, 1* user manual.You could enjoy 45-day free-returned,36-month warranty,and lifetime technology support. Any issue on using our unit, please email us freely.
  • RD RD6018 DC Power Supply Variable Adjustable Lab Bench Power Supply Buck Converter Step Down Switching Regulated 4-Digital LCD Display 60V 12-18A 800W
    Bestseller #1
    RD RD6018 DC Power Supply Variable Adjustable Lab Bench Power Supply Buck Converter Step Down Switching Regulated 4-Digital LCD Display 60V 12-18A 800W (27)
      You can use the USB micro cable to connect to the PC software, remote monitoring, settings and program upgrades. The built-in cooling fan with a thermal sensor will keep the power supply cool, reduce noise and extend life. Removable snap-on fuse is used, which is convenient to replace with new fuse and easy to repair. High precision, high reliability and perfect limit current protection, thermal protection, voltage overload protection function. When the output voltage or current exceeds the protection value, the output will be automatically turned off to prevent damage to the load.Widely used in homes, laboratories, schools, equipment maintenance, various battery charging, etc.
  • DC Power Supply Variable, 30V 10A Bench Power Supply with Output Switch, Short Circuit Alarm, Adjustable Switching Regulated Power Supply with 4-Digits LED Power Display, Encoder Adjustment Knob
    Bestseller #1
    DC Power Supply Variable, 30V 10A Bench Power Supply with Output Switch, Short Circuit Alarm, Adjustable Switching Regulated Power Supply with 4-Digits LED Power Display, Encoder Adjustment Knob (85)
      【Highly Accurate Encoder Adjustment】Just press the voltage or current encoder knob of the DC power supply to switch between each digit, and then turn the knob to set each digit in the range of 0-9. You can efficiently and accurately set the voltage and current data you need. It is more precise and convenient than traditional knobs. 【Output Switch Control】 In the process of using the variable power supply, you can press the output button at any time to turn on or turn off the output of the power supply. This design can prevent you from damaging the device because you forget to disconnect the output. Effectively improve the efficiency of your experiment. 【Precise four-digit screen display】 The bright digital display allows you to use the bench power supply in a dim environment. The screen brightness is adjustable. And it will display three values of voltage, current, and power at the same time. The data is accurate to 0.01V and 0.001A. 【Short Circuit Alarm】 When the load equipment fails and short-circuits, the adjustable dc power supply will emit a buzzer alarm. Prevent excessive output current from damaging the load equipment. In addition, it has multiple protections, such as grounding wire, leakage protection, thermal protection, voltage overload, power supply overload, etc. 【Packaging and After-Sales】 1 x Wanptek DC Power Supply, 1 x Output Power Cord, 1x Input Power Cord, 1 x User Manual. The variable dc power supply size is 7.48*3.54*5.90inch, Weight is 2.46lb. If you have any technical questions about our power supply, please do not hesitate to contact us.
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