13 Best DC Power Supplies

Whether you’re a ham radio aficionado, a certified electrical engineer, or a casual home hobbyist, you need high-quality DC power supplies to juice up your current engineering project (whatever it may be). Many models available for consumers are either powerful or affordable. Very rarely do you come across a power supply that is both.

Well, we’ve decided to do exactly that. 

To make things easier for our audience, we scoured the market for the best DC power supplies that could give sufficient power without breaking the bank. 

Lo and behold, we found thirteen. 

Table of Contents:

  • Array 3672A 35 Volt DC 22.5 Amp Programmable Switching Power Supply
  • Siglent SPD3303X-E 32 Volt DC 3.2 Amp Triple Output Power Supply
  • Lavolta 30V 5A Power Supply
  • Tekpower TP3005T Variable Linear DC Power Supply
  • Rigol DP832 Triple Output
  • CSI3005XIII Triple Output 30 Volt DC
  • CSI3003X330 Volt DC 3.0 Amp Triple Output Linear Power Supply
  • ITECH IT6933A 150V 5A Wide-range Programmable DC Power Supply
  • PPS2320A 32 Volt DC 3.0 Amp Three Output Programmable Linear Power Supply
  • CSI3644A 18 Volt DC 5.0 Amp Programmable Linear Power Supply
  • Pyramid Universal Compact Bench
  • CSI3646A Programmable DC Bench Power Supply
  • Extech 382275 Switching Mode

Keep reading to find out more.

Array 3672A 35 Volt DC 22.5 Amp Programmable Switching Power Supply

Array 3672A 35 Volt DC 22.5 Amp Programmable Switching Power Supply Best DC Power Supply

This highly-reliable, high-quality DC power supply is a programmable model capable of generating up to 780W—definitely a suitable choice for high-energy fieldwork or electrical engineering projects of a large scale. 

But despite that raw power, the Array 3672A is capable of testing low-voltage devices. Its minimum is roughly 0.6V at the load’s full rated current, but the maximum current can be achieved even if the input voltage drops to 0V. This is an incredibly useful feature when testing energy applications like fuel cells or solar cells.

This unit features a built-in circuit improvement that widens the CR mode’s application scope as well as its dynamic response. It is also capable of innovative CPV and CPC modes that can be applied to a testing voltage/current source with constant power. When the load’s set power level exceeds the output power of the power supply, both modes are also capable of effectively preventing a short circuit. 

This is in line with Array 3672A’s protective circuitry that provides protection against over-power, over-current, over-voltage, over-temperature, and reverse polarity.

Notable Specifications/Features:

  • An intelligent built-in cooling system
  • Specially ruggedized casing with rubber bumpers
  • Innovative CPV and CPC modes
  • D/A conversion rate can reach up to 100kHz

Siglent SPD3303X-E 32 Volt DC 3.2 Amp Triple Output Power Supply

Siglent SPD3303X-E 32 Volt DC 3.2 Amp Triple Output Power Supply Best DC Power Supply

A common name in the DC power supply market, Siglent has yet another product that exceeds all expectations. The SPD3303X-E Programmable DC Power Supply is a formidable 17.6-pound model with three isolated output channels: independent, series, and parallel. Two of them are adjustable and one is selectable from 2.5V, 3.3V, and 5V.

With a 4.3-inch TFT-LCD display and a Real-Time Wave Display, this unit gives users a lot of bang for their buck. It has five (5) sets of memory save/recall, which is perfect if you’re constantly running tests, and offers a maximum power output of 220 watts. It also has a modified short and overload protection system built-in, which is good for stressful conditions and high-stakes fieldwork—like production and development.

The unit itself is capable of meeting the needs of different power grids with its 100V/120V/220V/230V compatible design.

Notable Specifications/Features:

  • Three (3) independently controlled & isolated outputs
  • Intelligent, noise-reduced fan (temperature-controlled)
  • Clear user interface with waveform display function
  • Supports data storage space expansion
  • Supports Standard Commands for Programmable Instruments (SCPI)

Lavolta 30V 5A Power Supply

Lavolta 30V 5A Power Supply Best DC Power Supply

Weighing in at around 12.46 pounds and measuring 14.8 x 8.5 x 7.5 inches, this 30V 5A DC power supply from Lavolta still manages to be incredibly portable—thanks to its ergonomic carrying handle. Its rugged design may take some getting used to, but the aesthetics of the item take a back seat to its specifications.

Capable of 220V/110V switchable input and a recovery time of around 100 microseconds, this is a very hardy unit that functions just fine in substantially harsh environmental conditions. It’s suitable for test benches, engineering schools, and casual home projects.

The kit comes with a US power cord, two (2) test leads, and a detailed user manual. Specifically designed for safe, accurate, and easy use, it also comes with overload and short-circuits protection that triggers automatically (no manual input or jumpstart required).  

Overall, the Lavolta Lab Power Supply is great for commercial, education and home use.

Notable Specifications/Features:

  • 5A Maximum Current
  • The straightforward design makes it very user-friendly
  • Rugged, reinforced metal frame greatly improves durability

Tekpower TP3005T Variable Linear DC Power Supply

Tekpower TP3005T Variable Linear DC Power Supply Best DC Power Supply

One of the obvious heavyweights on this list, the Tekpower TP3005T is a reliable, heavy-duty DC power supply suitable for lab work, research, R&D, and industrial use. Its linear design makes for quiet, stable operation with virtually no ripple and minimal delay during conversion, transformation, and adjustment.

With a maximum output of up to 30 volts and a current capable of 5 amps, this unit definitely packs a punch.

Aside from being a variable DC power supply, the TP3005T has several other beneficial features: two fully operational modes, back-lit LED display with clear resolution, above-average LCD accuracy (+/- 2.%%), and programmable voltage and current. All in all, a strong contender in the market that offers a lot of power for a fairly low price.

Notable Specifications/Features:

  • Two operational modes: Constant Voltage Mode and Constant Current Mode
  • Built-in High Current Limiting for protection
  • Built-in thermo-sensor-activated cooling fan

Rigol DP832 Triple Output

Rigol DP832 Triple Output Best DC Power Supply

If your usual projects or current fieldwork requires you to work with three devices at once (max), the DP832 Triple Output from Rigol is definitely up to the job. Its three outputs total up to 195 watts all in all, with the first two capable of running up to 90 watts and the third running a substantial 15. You can also easily switch between all three outputs—very ideal for lab settings.

With this model, users can build a remote connection between the DC power supply and their PC using a USB, LAN, or GPIB connection. The machine is also completely programmable—and controllable—using SCPI.

The series this particular unit belongs to—the DP800 series—also has three built-in register sets: status byte register, standard event register, and questionable statue register.

Notable Specifications/Features:

  • Three (3) switchable outputs
  • User-friendly interface
  • Comprehensive LED display
  • Programmable voltage curves

CSI3005XIII Triple Output 30 Volt DC

Triple Output 30 Volt DC 5 Amp Linear Bench Power Supply Best DC power supply

Despite there being several other triple output benchtop models on the list, we just had to include the CSI3005XIII. A fully-regulated DC power supply with two adjustable output channels and one fixed one, this particular unit is great for jobs that depend on speed, accessibility, and stability—like test benches or repair facilities. 

The variable outputs measure 30V and 5.0 amp and the fixed one measure 5V and 3.0 amp; proof of this model’s versatility. All outputs can be found on the front panel for ease-of-access and straight-forward connection. 

The two variable outputs operate on a number of modes; specifically constant current and constant voltage modes. They also allow for user selectable voltage and current. You can fine-tune the voltage via knobs and select the current you want via a master button. And to top it all off, this highly economical bench power supply incorporates SMT PC boards and dual cooling fans to keep your power supply long-lived.

Notable Specifications/Features:

  • Multiloop high precision voltage regulation
  • Dual built-in cooling fan/cooling system
  • Built-in overload protection system/circuit
  • Rugged reinforced metal frame casing
  • SMD adhesive sheet element technology

CSI3003X330 Volt DC 3.0 Amp Triple Output Linear Power Supply

30 Volt DC 3.0 Amp Triple Output Linear Power Supply Best DC Power Supply

The CSI3003X330 is a fully-regulated, triple output DC power supply that features two adjustable output channels and one fixed—perfect for multi-tasking or multi-testing scenarios. This highly stable linear bench power is packed with just a ton of features, including a short circuit and current limiting protection system, a built-in cooling fan, and SMT PC boards to improve the device’s longevity.

The three outputs can be found on the front panel for ease-of-access and quick setup. The two variable ones run 30V and 3.0 amp, whereas the fixed one runs 5V and 3.0 amp.

The two variable output channels are capable of several modes, including constant current and constant voltage. Users can easily control the voltage and current via control knobs and a specified button, respectively. The LCD display is quite large and capable of clearly displaying the current outputs.

Perfect for laboratory work or educational use, this reliable, hardy model can withstand workloads units twice its size and specs can.

Notable Specifications/Features:

  • Multiloop high-precision voltage regulation
  • Built-in overload circuit protection
  • Dual terminal system (for safety testing or expandable screw terminals)
  • Large LCD display

ITECH IT6933A 150V 5A Wide-range Programmable DC Power Supply

ITECH IT6933A 150V 5A Wide-range Programmable DC Power Supply

ITECH’s IT6933A model is a highly programmable DC power supply capable of “intelligent” testing via rich SCPI instructions. It’s an incredibly versatile and responsive piece of hardware that, with a few simple commands, can run on its own. 

Very handy for remote testing and unpredictable fieldwork.

Furthermore, this particular model comes with a remote sense function that lets it avoid the pressure drop caused by the wire connecting the electronic load by allowing measurement directly on the terminal of the test object. This also greatly improves accuracy.

External measurement is also made easy thanks to the IT6933A’s low ripple, low noise, and built-in digital voltmeter. Overall, a durable, precise DC power supply that’s great for high-stakes projects of substantial scale.

Notable Specifications/Features:

  • VFD Display
  • Intelligent fan control/cooling system
  • Remote Sense Function
  • SCPI compatible

PPS2320A 32 Volt DC 3.0 Amp Three Output Programmable Linear Power Supply

32 Volt DC 3.0 Amp Three Output Programmable Linear Power Supply Best DC Power Supply

This programmable 32V DC power supply is a solid, multi-functional benchtop model that features 3 output channels and six modes: constant current, constant voltage, parallel, serial, and split rail (both negative and positive voltages). Two of the outputs are variable, capable of supplying 0-32V at 0-3 amps. The third one is a fixed output channel that allows users to select 2.5V, 3.3V or 5V with 0-3 amps available.

All digital controls can be found on the front panel but may be controlled via a PC interface.

What really sells us on the PPS2320A is its value. For the price you’re paying, you get a very reliable, full-featured unit that has all the good stuff you can find in models twice its price. For instance, it has a shielded toroidal transformer unit that powers all three output channels. Aside from the standard built-in cooling fan, it comes with separate heat sinks for the higher-powered channels, effectively improving the device’s longevity. The front panel has clear voltage and current level controls in the form of speed-sensitive knobs for fine-tuning. What’s more, it has four programmable memory buttons for lightning-fast recall.

Notable Specifications/Features:

  • One (1) fixed channel output and two (2) adjustable
  • Six (5) available configurations
  • OCP & OVP protection
  • USB interface
  • Three (3) methods of control

CSI3644A 18 Volt DC 5.0 Amp Programmable Linear Power Supply

18 Volt DC 5.0 Amp Programmable Linear Power Supply Best DC power supply

One of the most intuitive and responsive DC power supplies on the market, the CSI3644A is a programmable model that comes with a back-lit LCD display, numbered keypad, and rotary code switch for quick, on-the-spot programming. Small, lightweight, and easy to transport, it’s a great unit to have for constant, on-going projects or multiple testing.

You can monitor the readings via your PC if you have an RS232 adaptor module (optional) and the corresponding software. Otherwise, the LCD display works just fine for voltage, current, and power readings.

The CSI3644A can be operated at constant current mode, constant voltage mode, and constant power mode. What’s more, it can accept and store up to ten (10) individual settings—perfect for lightning-fast recall. Overall, it’s a sophisticated instrument suitable for scientific research, educational labs, and similar applications.

 Notable Specifications/Features:

  • Stored memory allows for up to 10 settings
  • Capable of both voltage and current protection (over and/or under)
  • The maximum current can be user-defined
  • Lightweight, very portable

Pyramid Universal Compact Bench

Pyramid Universal Compact Bench Best DC Power Supply

At first glance, the Pyramid Universal Compact Bench may seem like a typical DC power supply. It seamlessly converts AC to DC, it has decent voltage and wattage, and its dimensions are about the same as other bench-type units.

However, upon closer inspection, you’ll begin to understand why we included it on this list.

This universal DC power supply from Pyramid comes with USB and screw-type terminals for easy access and quick, reliable connection—a constant 13.8-volt connection, to be precise. Ideal for use with ham radios and other casual, hobbyist electronics, this model is housed in a durable construction with rubber feet to keep other electronics (and electric items) safe.

It comes equipped with an intuitive, built-in electronic overload and short circuit protection system to ensure the PSU is 100% safe for consumer use.

This model was designed to act as a regulated power supply for residential homes, but it has all the bells, whistles, and electric power one would need for engineering projects of a larger scale. Consumers can easily use it to test components and device equipment, as well as head field operations, and it would no doubt perform beautifully every single time.

Notable Specifications/Features:

  • Unit is not prone to overheating—even before the cooling fan kicks in
  • Durable housing with rubber feet
  • Screw-type terminals
  • Switch-activated power control eliminates need for external power source
  • Constant amperage up to 30 AMP

CSI3646A Programmable DC Bench Power Supply

72 Volt DC 1.5 Amp Programmable Linear Power Supply DC Power Supply

Admittedly one of the more costly models on this list, the CSI3646A Programmable Power Supply more than justifies its price tag. It has a ton of features packed into its 14-pound body, including adjustable and constant-voltage outputs, PC monitoring capabilities, and a sweet memory recall function for up to ten programmed settings. 

Surprisingly high-res at 1mv and with a maximum power output of 108 watts, the CSI3646A gives users the freedom to constantly adjust, program, and define their project parameters. With highly intuitive voltage and current protection (for both over and under events), it’s suitable for full operation in a wide variety of settings.

Notable Specifications/Features:

  • Numeric keypad and rotary knob for programming
  • The maximum current can be user-defined
  • Up to 10  store/recall memory settings

Extech 382275 Switching Mode

Extech 382275 Switching Mode Best DC Power Supply

The Extech 382275 Switching Mode is a nifty DC power supply that is capable of providing users with up to 600 watts of energy—an absolute must-have in electronic or engineering projects with a substantial scale. It’s a highly stable, lab-grade model that is easy to configure and customize. It offers a substantial degree of control over both current and voltage outputs. 

The output itself is adjustable, ranging from 0V to 30V DC and 0A to 20A. The LED display features an easy-to-read interface that is very user-friendly.  It comes with four operating modes: normal, preset, set, and remote control.

Yes, the Extech 382275 can be remotely controlled. You can easily adjust the settings or program the unit without being right next to it.

This, coupled with its incredible energy capabilities, makes it perhaps the best choice to have for fieldwork projects or uncontrolled, high-stakes environments.

Notable Specifications/Features:

  •  Excellent RFI immunity
  • Comes with own remote control
  • Capable of 600W
  • Programmed user-defined presets for Voltage and Current
  • Dual LED Displays (3-digits)

Conclusion

We here at Circuit Specialists hope that you found the list of the best DC power supplies informative.

  • Array 3672A 35 Volt DC 22.5 Amp Programmable Switching Power Supply
  • Siglent SPD3303X-E 32 Volt DC 3.2 Amp Triple Output Power Supply
  • Lavolta 30V 5A Power Supply
  • Tekpower TP3005T Variable Linear DC Power Supply
  • Rigol DP832 Triple Output
  • CSI3005XIII Triple Output 30 Volt DC
  • CSI3003X330 Volt DC 3.0 Amp Triple Output Linear Power Supply
  • ITECH IT6933A 150V 5A Wide-range Programmable DC Power Supply
  • PPS2320A 32 Volt DC 3.0 Amp Three Output Programmable Linear Power Supply
  • CSI3644A 18 Volt DC 5.0 Amp Programmable Linear Power Supply
  • Pyramid Universal Compact Bench
  • CSI3646A Programmable DC Bench Power Supply
  • Extech 382275 Switching Mode

Remember to always consider all factors and the projects for which you’ll be using it. DC power supplies are powerful devices! It only makes sense to do your research and choose the best so you get the best results.

Still need more information or would you rather talk to someone directly? You can email us at any time at sales@circuitspecialists.com or 1-800-528-1417. 

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