Best Variable Power Supply

Category: variable power supply 👁 245 👍 35 ★★★★☆4.1

The 10 Best DC Power Supplies

  • Rigol DP832 Triple Output. REVIEW.
  • Extech 382280 Precision. REVIEW. ...
  • Korad KA3305D Precision Variable. REVIEW. ...
  • Tekpower TP3005T Variable Linear. REVIEW. ...
  • Dr. Meter 30V/5A DC Bench. ...
  • Extech 382275 Switching Mode. REVIEW. ...
  • Pyramid Universal Compact Bench. REVIEW. ...
  • Tekpower TP152A Variable. REVIEW. ...

Forbye, how do I choose a power supply for my bench?

The following key characteristics are crucial when selecting a bench power supply:

  • Load regulation – A measure to determine whether the output channel can remain constant during changes in the load. ...
  • Line regulation – This is a measure of the power supply's ability to maintain its output voltage or output current.
  • On top of, which is better linear or switching power supply? With a good design, a switching power supply can have excellent load and line regulation. ... A switching power supply has greater efficiency than linear regulators because the switching transistor dissipates little power when acting as a switch. However, this switching can generate noise which can be lowered by filtering.

    Beyond, what are the 3 types of power supply?

    There are three major kinds of power supplies: unregulated (also called brute force), linear regulated, and switching.

    How do I choose a DC power supply?

    In order to select the right power supply there are some important basics to understand.

  • Voltage Rating. If a device says it needs a particular voltage, then you have to assume it needs that voltage. ...
  • Current Rating. Current is a bit different. ...
  • Replacing Existing Supply. ...
  • Advanced Concepts.
  • BESTSELLER NO. 1 in 2021

    DC Power Supply Variable, Adjustable Switching Regulated Power Supply 30V 5A with 4 Digits Display, Course and Fine Adjustments(00.01V, 0.001A), Data Hold - 110V/115CM Alligator Leads MDC01

    DC Power Supply Variable, Adjustable Switching Regulated Power Supply 30V 5A with 4 Digits Display, Course and Fine Adjustments(00.01V, 0.001A), Data Hold - 110V/115CM Alligator Leads MDC01
    • ▲HIGHER PRECISION WITH DATA HOLD FUNCTION - It is more precise to switch between coarse and fine tuning only by pressing one adjusting knob lightly from 0 to 30V, 0 to 5A. To press two knots 3 seconds simultaneously for holding a set of values and then press 3 seconds to release
    • ▲4 DIGITS READINGS WITH BACK-LIT LED DISPLAY - With a 0.01V and 0.001A resolution, 4 digits provide more accurate and clearer visible readout for the voltage and current value only via two knobs, extremely durable and easily visible even in low-light usage, meeting the needs of most people, ideal for small labs or the hobbyist at home
    • ▲HIGH-QUALITY WITH ESSENTIAL SAFETY - Grounding wire, thermal protection, voltage overload and short-circuit protection ensure the safety; The built-in fan reduce the operation noise, prolonging the life of product effectively
    • ▲CONSTANT VOLTAGE & CURRENT OPERATION MODE - Easy to dial in the desired voltage with the encoded-controlled fine and coarse adjustment knob, can easily see the amperage and voltage change as circuit components are switched in and out
    • ▲WHAT YOU GET - 1 x MDC01 Power supply host , 1 x Output power cord , 1x Input power cord, 1 x User manual ,(If you received items with signs of damage or wear during the shipping, please feel free to contact us and we promise help you solve the problem or resend.)
    BESTSELLER NO. 2 in 2021

    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

    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
    • ◆【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.
    BESTSELLER NO. 3 in 2021

    Adjustable DC Power Supply (0-30 V 0-10 A) with Output Enable/Disable Button HM310 Mini Variable Switching Digital Bench Power Supply

    Adjustable DC Power Supply (0-30 V 0-10 A) with Output Enable/Disable Button HM310 Mini Variable Switching Digital Bench Power Supply
    • 【Auto Power Calculation】 - Intelligently calculates output voltage and current into power and displays the value on its large screen.; decimal point automatic carry & LED 4 digits display of voltage function displays.current and powe; The keyboard can be locked to prevent misoperation.
    • 【Output switch control】 - Sometimes we need to switch between different voltage or current outputs, but we often forget to unplug the previous instrument and cause the instrument to burn out.,which often occurs in the maintenance.Output key is designed to solve this problem.By pressing the Output key, the required voltage and current can be adjusted without the actual output power,Which makes this DC power supply more secure and more energy efficient.
    • 【Safe and Reliable to Use】 - Safety is our priority. The built-in fan low arc noise & low ripple,prolonging the life of product effectively. Productive work since the power supply comes multiple protection of Over-voltage, over-current, over-power, over-temperature, short-circuit powerful protection function.
    • 【Wide Application】 - Applied in production line test, electrical maintenance, aging products, battery charging, laboratories scientific research and teaching and all other need DC regulated power supply.,Nice gift choice for DIY electronics hobbyist.
    • 【Manufacturer's Package】 - 1 * HM310 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.
    BESTSELLER NO. 4 in 2021

    Kungber DC Power Supply Variable, 30V 5A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V2A USB Output, Coarse and Fine Adjustments with Alligator Leads

    Kungber DC Power Supply Variable, 30V 5A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V2A USB Output, Coarse and Fine Adjustments with Alligator Leads
    • High Precision with 4-Digit and Power Display: Kungber 30V 5A DC benchtop power supply is a professional power supply regulation device that has a high resolution of 0.01V and 0.001A. You can easily tune it within 0-30V and 0-5A. 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 SPS305 DC Power Supply, 1 x Output Power Cord , 1x Input Power Cord, 1 x User Manual, and 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.
    BESTSELLER NO. 5 in 2021

    DC Power Supply Variable 30V 10A, KAIWEETS 4-Digit Large Display Adjustable Switching Regulated Power Supply with USB Interface

    DC Power Supply Variable 30V 10A, KAIWEETS 4-Digit Large Display Adjustable Switching Regulated Power Supply with USB Interface
    • High Measurement Accuracy: This 30V 10A dc power supply has a high resolution of 0.01V and 0.01A. The 4 LED digital display provides a more accurate readout for the voltage and current value, even be visible easily in the low-light conditions.
    • Constant Voltage & Constant Current Operation Mode: The easy-to-use rotary knob of coarse and fine could adjust the data of voltage and current digit by digit, which allows you to set the desired output resolution quickly and easily in 30V 10A.
    • 5V/2A USB Interface & The design with Elastic Handle: This adjustable power supply could charge the device which you want to repair. It also features a large display that makes it easy and accurate to read voltages and currents. In addition, the design with Portable and lightweight could help you to carry it easily.
    • Multiple Protections: This bench power supply provides overvoltage, overcurrent, overtemperature, overload, and short circuit to protect your device, prolong the service life of the dc power supply. In addition, it also has multiple heat radiation grooves on both sides, provides the cooling & exhaust fan protection.
    • SAFETY CERTIFICATE & SERVICE: This power supply conforms to RoHs and CE-Marking. Combined with Amazon's excellent delivery service, we provide 36-Month after sale service, lifetime technical support. Please feel free to contact us if you have any concerns.
    BESTSELLER NO. 6 in 2021

    DC Power Supply Variable 30V 10A, 4-Digital LED Display, Precision Adjustable Switching Regulated Multifunctional Power Supply Digital with USB Interface, Disply with Output Power Lab Grade

    DC Power Supply Variable 30V 10A, 4-Digital LED Display, Precision Adjustable Switching Regulated Multifunctional Power Supply Digital with USB Interface, Disply with Output Power Lab Grade
    • ◆【High Precision, Wide Range】LONGWEI DC power supply is a professional power supply regulation device that designed with crystal clear, backlit 4-digit LED display of voltage, current, and power. Precise accuracy: 00.01V and 00.01A. You can easily tune it within 0-30V and 0-10A. Very durable and easy to observe even in low light conditions.
    • ◆【5V/2A USB interface& Auto Power Calculation】What does the USB do? Please don't worry about run out of power now, you can charge your phone, repair phones and more through the 5V/2A USB interface. The hot selling point is that this power supply can calculate output voltage and current into power intelligently and displays the value on its large screen accurately. 110V / 220V input voltage can be switched and can be used worldwide.
    • ◆【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 3kgs and measures only 11.2 x 5 x 5.7 inches, Applies for laboratory, school, home, electronic repair DIY, aging test and other requirements thanks to complete test probes and output cable with alligator clips.
    BESTSELLER NO. 7 in 2021

    3V - 24V 1.5A 36W Adjustable DC Power Supply Kit Adapter Speed Control Volt Display with Variable 8 Plugs and 1 Polarity Reverse Cable

    3V - 24V 1.5A 36W Adjustable DC Power Supply Kit Adapter Speed Control Volt Display with Variable 8 Plugs and 1 Polarity Reverse Cable
    • Adjustable and display multi voltage
    • 100V - 120V Input; 3V - 24V Output 1.5Amax; 36W Max
    • Special Buit-in Power off switch, more convenient and easy to control with this function.
    • With 8 different Plugs & 1 Polarity reverse cable.
    • All-in-One Adapter - fits 95% of AC/DC home appliances.
    BESTSELLER NO. 8 in 2021

    DC Power Supply Variable 3 Digital LED Display Adjustable Regulated Switching Power Supply Digital with Leads Power Cord (30V 10A)

    DC Power Supply Variable 3 Digital LED Display Adjustable Regulated Switching Power Supply Digital with Leads Power Cord (30V 10A)
    • ♦To prevent scratches,the display screen has a thin protective film,which may not be obvious.If you find scratches on the screen, you can look at it carefully and you will find that there is a protective film on the screen. If you have any problems, please contact us.Output Voltage:30V,Output Current:10A,Dual Digital display.With USB Output(5V 2A).Fan of the power supply will automatically turn on when temperatures reach 50 ℃.
    • Burnt out apply input power may be caused by incorrect settings, you can contact us and we will provide you with relevant operations and precautions. We will certainly give you a satisfactory solution.【30V dc bench power supply】we have limit current protection, thermal protection, voltage overload protection, short-circuit protection.【 The power cord does not conduct current, which is a very rare phenomenon, if this problem occurs, please contact us. Free replacement.】
    • If you find that you can't use it as described in the product, please contact us and we will solve it for you. Our products are professional to a certain extent, so you can also follow the instructions in the user's manual.& If you find that this equipment is underpowered, please do not worry, you can contact us, we will teach you how to use it correctly, this power supply needs some correct settings.
    • ♦When you are unable to adjust the current, it may be because you do not have access to the electronic load. You can turn on an electronic load or form a short connection and then adjust it. You can also contact us.【Application】this dc power supply for phone repair,Lab use,battery charge,plating,etc.
    • ♦ If you find that the power supply does not work or the screen does not display after receiving the goods, please contact us immediately and we will give you an unconditional refund. If you have anything you don't understand in the process of use, please contact us and we will answer it for you.
    BESTSELLER NO. 9 in 2021

    Flycow DC Power Supply Variable, Adjustable 30V 10A Switching DC Regulated Power Supply with 3 Digit LED Display Reverse Polarity/High Temperature Protection 110V/100CM Alligator Leads Included

    Flycow DC Power Supply Variable, Adjustable 30V 10A Switching DC Regulated Power Supply with 3 Digit LED Display Reverse Polarity/High Temperature Protection 110V/100CM Alligator Leads Included
    • √ 【High Sensitivity and High Accuracy】Its output voltage and output current could be continuously adjusted knob lightly from 0 to 30V,0 to 10A.Its precise accuracy is 00.1V and 0.01A.It is designed for laboratories,schools,home,test and production lines
    • √ 【Constant Voltage and Current Operation Mode 】The current of variable power supply easy to adjust in the required voltage range and see the change of current and voltage through the access and disconnection of circuit components
    • √ 【Quality Components and Safety】Ground wire and a lead:Built in fuse and the internal fan greatly reduces the sound generated during operation;perfect thermal protection, short circuit protection, overload protection function protection circuit
    • √ 【Lightweight Design,Easy to Carry】Lab power supply have 3-digit LED large screen digital high resolution display, high brightness display can be reassuring even in the dark environment, for professional organizations or family enthusiasts
    • √ 【Packaging and After Sales】1 x power host, 1 x output power cord, 1 x input power cord, 1 x user manual, 1 x warranty card, providing professional after-sales service and support, so that you can use it safely,5V USB port output can quickly charge
    BESTSELLER NO. 10 in 2021

    DC Power Supply Adjustable (0-30 V 0-10 A), Eventek KPS3010D Variable Switching Regulated Digital Power Supply with Alligator Leads US Power Cord

    DC Power Supply Adjustable (0-30 V 0-10 A), Eventek KPS3010D Variable Switching Regulated Digital Power Supply with Alligator Leads US Power Cord
    • 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 !

    5 More Questions Answered

    Why is DC current not used in homes?

    Large transformers are used to run transmission lines at high voltages in order to keep losses to a minimum. But high voltage is dangerous, particularly to life, so bringing it into a house would not be an acceptable risk. ... DC arcs do not "quench" as easily (because voltage does not go through zero).

    When should I use bench power supply?

    When it comes to powering a circuit or any electronic device for repair, troubleshooting, or analysis, a bench power supply is the tool to turn to. They provide the clean and controlled power you can rely on so that you can focus on the circuit, not the supply.

    How do you use a variable power supply?

    Why are bench power supplies so expensive?

    High-quality bench supplies have a service life measured in decades, so they don't get replaced very often. For any given model of power supply, the shipments are probably in the single-digit thousands per year, or even less. This results in much higher manufacturing costs.

    What is the difference between linear and switching power supply?

    Linear power supplies deliver DC by passing the primary AC voltage through a transformer and then filtering it to remove the AC component. Switching power supplies feature higher efficiencies, lighter weight, longer hold up times, and the ability to handle wider input voltage ranges.