best bench power supply

10 Best Bench Power Supply of 2021 – Reviews By An Expert!

On an electronic engineer and circuit designer’s desk, a bench power supply is a typical control and measurement equipment. They supply DC (direct current) voltage, such as a circuit board or other product being validated, to a system under evaluation.

Top 5 Best Bench Power Supply: Editor Recommended

Usually, the device is positioned on the engineer’s work area or bench; thus, the label “bench power supply.”
All with various features and functionality to accommodate the design and debug apps are available in multiple styles. This article offers a rundown of the best bench power supply and some different features and applications to consider depending on your needs.


Are you having trouble choosing for your applications which DC bench power supply you require? Are you perplexed by the large number of available power sources on the market?
Not all supplies of power are the same. When choosing an overall bench power supply, several considerations are considered, and some major-specific characteristics to understand.
It is very straightforward to pick the correct power supply based on your voltage and current specifications when you need a simple power supply. It is easy to choose from a range of power supplies to suit your needs when you have specialized specifications for a power supply with source and measurement functionality.

Identifying the application you need, allows you to narrow down the purchase choices to pick the optimal power supply. Any of the basic requirements for specifying and purchasing a DC power supply are discussed here. The guide includes;
• Requirements for Production and Power
• Characteristics of performance
• Protection functionality and density of packaging
• Complete Ownership Expense

Requirements for Production and Power

Let’s examine, for instance, a System Under Test (DUT) that needs testing. How much energy do you need? Can the DUT demand full strength at a particular point? Does it need different voltage and current settings for maximum power? What is the range of energy in your applications that you want to provide?

When evaluating multiple devices concurrently, various outputs are vital. Consider if the results need separation from each other and the supply’s monitoring capability when selecting a numerous outlet power supply. A single output is enough in several situations, but multiple output supplies give some significant benefits.

One other factor to consider is the type of load that the power supply requires to power: the voltage programming response time will be influenced by resistive, inductive, or capacitive regardless of the load behavior. For potential expansion, you can even suggest using a higher power model.

Characteristics of Performance

Several engineers have perceptions that an assured specification is any number appearing on a data sheet. Depending on the application, though, power supply requirements can differ. There are two kinds of specifications: guaranteed and typical. Through a full product test study, the manufacturer defines a guaranteed or warranted specification.

The manufacturer is responsible for any confusion that may impact its products’ efficiency. An average or expected value of the capability of the product is a typical specification. The findings of the evaluation are from a fixed series of measures from multiple units of the product.

When choosing a bench power supply, the below crucial characteristics are vital:

  • Load regulation: A method of measuring to evaluate whether the output channel during load changes can stay constant. The adjusted parameter should not shift dramatically as the impedance of the DUT changes.
  • Line regulation: This calculates the capacity of the power supply to sustain its output voltage or output current. In comparison, the voltage and frequency of the AC line input differ across the entire permissible spectrum. Line voltage and frequency, significantly when pulling maximum current from the supply, impact the available power to feed the output.
  • Sense connections: The power supply’s local and remote sense capabilities.
  • Interface: That’s the front panel and remote LAN, GPIB, USB, RS232, and so on.
  • Read-back accuracy: Calculates how close the internal measured values are to the output voltage’s potential value after the setting accuracy is applied-± (percentage of measured value + offset).
  • Resolution setting: Represents the smallest adjustment chosen on the power supply in voltage or current settings. The resolution specification specifies the number of distinct levels that can be set and determines a mix of usable user interface digits and bits in the digital-to-analog converter (DAC).
  • Transient response: This is the time required after a destructive shift in load current for the output voltage to revert to the programmed level.
  • Ripple and noise: excellent control, low noise, and remote sensing capabilities reduce the decrease in voltage through load leads. Such functionalities are essential aspects of a power supply.

Protection functionality and density of packaging

When working with a power source, protection still comes first. In the case of a failure to prevent damage to the DUT, it is essential to provide a power supply safety feature and DUT protection.
Protection circuits in the power supply may restrict the voltage or current in the circuit to run, and then when overvoltage or overcurrent occurs, it will shut down the power supply.
Any powder suppliers have a circuit down-programmer. Whenever it receives a fault trigger signal, the down-programmer circuit will turn on the relay and separate the DUT from the power source.

How much room do you have for the Bench power supply?

Of several sizes and weights, power supplies arrive. Appropriate for the intended use, each power supply provides essential advantages. A list of the benefits and drawbacks of the linear power supply is below:

• Low noise output
• Rapid transient response
• Rate of high-programming
• Disadvantages
• Low productivity
• Increased cooling needed
• In Cathode Ray, higher levels of low-frequency magnetic radiation cause flicker.
• Tubes (CRTs)
• Wider in size

Top 10 Best Bench Power Supply Reviews:

1. DC Power Supply Variable, Adjustable Switching Regulated Power Supply

DC Power Supply Variable, Adjustable Switching Regulated Power Supply

By pressing one changing knob gently from 0 to 30V, 0 to 5A, it is more effective to turn the DC Power Supply between coarse and fine-tuning only. With a resolution of 0.01V and 0.001A, this DC Power Supply provides a more precise and more transparent visible reading of the voltage and current value only through two knobs, incredibly robust and readily visible even in low-light use, satisfying most people’s needs, suitable for small laboratories or home hobbyists.
The Adjustable DC Power Supply Variable comes with Grounding cable, thermal insulation, overload voltage, and short-circuit protection to ensure protection. Its built-in fan decreases running noise and ultimately prolongs the device’s life.

Through the encoded-controlled fine and coarse adjustment knob, it is simple to dial into the appropriate voltage. Its amperage and voltage shift can be seen as circuit components are switched in and out.

Key Features:
• Specifications: Input voltage: 220 V/110V¡À10 % 50/60Hz
• Output current: 0-5A
• Output voltage: 0-30V
• Relative humidity: <70 percent
• Relative humidity: <80 percent
• Constant current state: Current stability: < 0.2% +3mA
• Stability of load:< 0.2% +3mA
• Ripple & noise:< 3mArms

• The easy to read four-digit LED
• Well-made with all the vital safety characteristics
• With the coded-controlled button for fine and coarse adjustment
• The fan (built-in) defends the main body from high temperatures

• Does recommended for hot environments.
• Highly explosive and inflammable.

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2. Tekpower TP3005T Variable Linear DC Power Supply

Tekpower TP3005T Variable Linear DC Power Supply
  • High precision DC regulated power...
  • Two operational modes: constant...
  • Cooling fan automatic activation by...

Although the Tekpower TP3005T is small and lightweight, it is a linear power supply that produces massive output. It’s equipped with two modes of operation; constant voltage and constant current. There is also automatic triggering of the cooling fan by an integrated thermo-sensor.
As Tekpower is a linear type of power supply, it is best used for laboratory experiments and industrial applications.
Tekpower DC Power Supply has nominal peak voltage of up to 30 volts and up to 5 amps of current. And it has rotatory switches for voltage and current to make it even easier for you to set the changes. On the other side, the back-lit LED panel helps you to see the readings.

Key Features:
• Output DC Voltage: 0.0V-30.0V
• Output DC Current: 0.00V-5.00 A
• Voltage Input: 110V/AC, 60Hz
• Regulation of load: CV &lt; 0.01% + 3mV, CC &lt; 0.02% + 3mA
• Adjusting voltage and current
• Regulation of voltage: CV <0.01 percent + 3mV, CC <0.2 percent + 6 mA
• Ripples and sounds: CV &lt; 1 mV rms, CC &lt; 3 mA, rms
• Protection: high current restricting & cooling fan.

• Cooling fan inside
• reliability and versatility
• an invaluable and indispensable tool for testing
• User manual

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3. Dr.meter 30V/5A Variable Linear DC Bench Power Supply

Dr.meter 30V/5A Variable Linear DC Bench Power Supply
  • ★【DC regulated power...
  • ★【Auto Conversion】Current can...
  • ★【Multiple...

This device from Dr. Meter may be the one that suits your needs if you want an inexpensive but reliable bench power supply. It is a linear kind of power supply that is consistently adjustable with high stability, high reliability, and low noise.
Dr.meter can be used for production lines, school electronics, laboratory experiments, communication maintenance, academic research, and so many more, with the stable power it offers.
With an automatic cooling fan and overload and short circuit protection, this bench power supply is designed. It is operational and can be managed as a constant or constant current voltage source.

Key Features:
• Single Output, Single Phase
• The input voltage of 110V/220 ±10 percent, dual-input voltage.
• The adjustable output of constant current
• Adjustable constant voltage output
• 3LED Voltage and Display of Current
• A button monitors the converted mA and A displays.
• Model for continuous voltage and current implementation

• Upgrade Elastic Handle, Easy to Carry
• Side Cooling Design
• Exhaust Fan Protection
• Has Stop/Out button

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4. Eventek KPS305D DC Power Supply (0-30 V 0-10 A)

Eventek KPS305D DC Power Supply (0-30 V 0-10 A)
  • DC Power Supply Adjustable: 0-30...
  • Constant voltage and current...
  • Intelligent temperature control...

The Eventek DC Power Supply is specially equipped for scientific research, the growth of goods, labs, schools, and computer manufacturing lines. At nominal value, the output voltage and current are continuously adjustable. The DC power supply features high precision, reliability, ideal overload, and safety circuit for short circuits. It has a constant voltage and mode for the current operation.

Key Features:
• Output voltage: DC 0-30V Continuous adjustable
• Output DC Current: 0V – 10A
• Display resolution: voltage: 0.1V, current 0.01A
• Voltage and Current adjustment
• Voltage regulation: CV 0.01% + 3mV, CC <0.2% + 6mA
• 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 < 3mA, rms
• Cooling way: Intelligent temperature control fan
• Dimension: 8.8 x 3.2 x 6.5 Inch
• Unit weight: 3.2 pounds

• Multiple protections: limit current protection
• thermal protection
• voltage overload protection
• hot-circuit protection
• Intelligent temperature control with a built-in thermos-sensor effectively reduce noise and prolong the life of the product

• Highly Inflammable and explosive

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5. Eventek KPS305D DC Power Supply (0-30 V 0-5 A)

Eventek KPS305D DC Power Supply (0-30 V 0-5 A)
  • DC Power Supply Adjustable: 0-30...
  • Constant voltage and current...
  • Intelligent temperature control...

This DC power supply variable from Eventek is a reasonable choice to consider if you choose small and lightweight equipment for your electrical and power requirements. It is a controlled switching type of power supply that is lightweight but generates a massive output.

The Eventek DC Power Supply is equipped with different protections such as electrical, thermal, voltage overload, and short circuit limit. This ensures a stable and safe service anytime the power supply is required.

As it is a form of switching, the noise is minimized, and the product’s life is extended, and it is engineered with an integrated thermo-sensor with intelligent temperature control.
For all your experimental studies, laboratory work, schools, and electronic lines of output, you can use them.

Key Features:
• Continuously adjustable output voltage: DC 0-30V
• Output DC Current: 0V & 5A
• Overall efficiency: ~89%
• Resolution of the display: voltage: 0.1V, current 0.01A
• Adjusting voltage and current
• Regulation of voltage: CV 0.1 percent + 3mV, CC < 0.5 percent + 6 mA
• Protection: Restricting cooling fan with high current
• Stabilization of loads: CV 0.5 percent +1mV / CC 0.5 percent +3mA
• Multiple protections: limit current protection
• thermal protection
• voltage overload protection
• hot-circuit protection

• Highly Inflammable and explosive

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6. Variable 3 Digital LED Display Adjustable Regulated Switching Power Supply

Variable 3 Digital LED Display Adjustable Regulated Switching Power Supply
  • ♦To prevent scratches,the display...
  • Burnt out apply input power may be...
  • If you find that you can't use it...

The DC power supply is a perfect tool suitable for both laboratory and industrial use. It is appropriate for laboratories and research institutes; this power supply has the maximum operational safety, good stability, and reliability, easy to use.

Key Features:
• Input Voltage: AC 110V, 60Hz
• Voltage of output:0 ~ 30V
• Input Current:0 ~ 10A Current:
• Present Resolution:0.01A Current Resolution:0.01A
• Power Effect: CV 1% +10mV
• USB Voltage Output Resolution:00.1
• Impact of load: CV 1% +10mV
• Voltage Display Precision: ±1%+1digits
• Current Display Precision: ±1%+2digits
• Ripple and Noise: Vp-p≤1%
• Operating Environment:(-10~45)Rh<90%
• Power Plug & Voltage: US Plug 110V

• High precision
• Low noise
• Stable output
• Automatic cooling
• Fast responses

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7. Power Supply Precision Variable Digital Adjustable w Clip Cable

Power Supply Precision Variable Digital Adjustable w Clip Cable
  • Durable steel case
  • Constant voltage and constant...
  • Multiple protections: over voltage...

On our ranking, home electronics enthusiasts and DIYs can purchase Yescom DC Supply. This Bench Power Supply is intended to have a digital display to access the voltage and current settings. Its buttons and dials are all set out in a basic layout that enables you to manage the power supply you need more quickly.
Yescom DC Power Supply comes with a constant voltage and constant current operating mode and has many over-voltage, open circuit over the temperature safeguards.
When you have any fix to do or job to do connected to technology, its safety features guarantee you a stable and protected service.

Due to its efficiency and power source reliability, you can use it with a full load for 24 hours.
It is also designed to change the speed based on the load situation with an advanced temperature control fan.

Key features:
• A voltage of input: 110V±10 percent 60Hz
• Output voltage: DC 0-30V Continuously adjustable
• Stabilization of voltage: 0.05 percent +1mV
• Stabilization at the current: 0.1 percent +10mA
• Stabilization of load: CV 0.1% +1mV / CC 0.1% +10mA
• Output current: DC 0-10A Continuous adjustable
• Resolution display (voltage): 0.1V, current 0.1A.
• Ripples and noises: CV 10 mV(RMS)/CC20mA (RMS)
• Power Supply: 110V AC

• The smart temperature regulation fan changes the velocity to the load situation.
• Safe circuit design
• Adoption of high-quality main components
• Great for aging product testing, battery industry, inverter, LED industry manufacturing

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8. Adjustable Switching Regulated Power Supply Digital

Adjustable Switching Regulated Power Supply Digital
  • ◆【High Precision, Wide...
  • ◆【High Quality with Essential...
  • ◆【Excellent Heat...

The DC Power Supply’s voltage and current values and power are simple to understand through a detailed 3-digit LED display with 00.1V and 0.01A precision. And in low light conditions, it is very resilient and easy to observe. The input voltage through the switch on the back can be manually converted to 110V or 220V.
It is fitted with a massive fan powered by a smart sensor for temperature control and several heat radiation grooves on both sides, essentially prolonging fan life and reducing noise.

Key Features:
• Input voltage: AC 110V / 220V (selection of switches), 50Hz / 60Hz
• Voltage of output: 0-30V
• Output current:0-10A
• Precision of display:±1 % ±1 %
• Efficiency:> 85%
• Operating atmosphere:-10 ° C to + 60 ° C / 30% RH to 90% RH

• Automatic exhaust
• Rational design
• Super sound-off
• Anti-interference
• High precision

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9. Dr.meter Variable 4-Digital LED Display Power Supply

Dr.meter Variable 4-Digital LED Display Power Supply
  • ▶ 【High Precision, Wide...
  • ▶ 【5V/2A Output & Auto Power...
  • ▶ 【Excellent Heat...

The Dr.meter 30V/10A power supply is a DC operated power supply with continuously adjustable output voltage and current, 4-digit output voltage, current, and power LED display, and a 5V/2A USB interface. With its compact scale, moderate weight, and high performance, this system can withstand long-term service under maximum power conditions and, after continuous operations, has meager failure possibilities.
You can use it comfortably in scientific studies, schools, factories, and more equipped with over-temperature, over-load, current-limiting safeguards.

Key Features:
• Input Voltage: 220V +/-10 percent @50Hz or 110V+/-10 percent @60Hz (can be manually switched)
• Working conditions: -10 degrees Celsius~40 degrees Celsius, <80% relative humidity
• Conditions for storage: -20 degrees celsius ~ 80 degrees celsius, <70% relative humidity
• Impact of power supply: CV<=0.2 percent +10mV, CC<=0.2 percent +10mA
• Noise and Ripple: CV<=20mV r.m.s., CC<=20mA r.m.s.
• Load Effect: CV<=0.2% +5mV, CC<=0.2% +10mA
• Display precision: 4-digit LED display with +/-0.2 percent +/-1 digit accuracy

• Compact and lightweight
• Precise 4-digit LED display
• Heat Dissipation
• Input Voltage Conversion
• Built for Portability
• Full Set of Accessories

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10. KORAD KA3005P – Programmable Precision Variable Adjustable 30V, 5A

KORAD KA3005P - Programmable Precision Variable Adjustable 30V, 5A

The KORAD KD3005P is a linear power supply with a 4-digit LED display and provides up to 30V and 5A. It comes with many fantastic features that are useful for the price. The memory keys are convenient (M1, M2, M3, M4).

The DC Linear Power Supply helps you to save multiple configurations by default (voltage and current). E.g., the 3.3V 500mA configuration can be saved in M1, and the 5V, 1A configuration in M2. You just need to click the memory buttons any time you want to turn between these settings-the knob does not need to be rotated.
You can also connect the power supply to your device and use its software to provide extra features to monitor the power supply. For starters, at particular time intervals, you can produce a series of voltages. All the data can also be stored in a text format, which is great for later review and plotting of the data.

Key Features:
• Input Voltage: AC 110-220V/ 50-60HZ
• Range of Voltage/Current: 0-30V/ 0-5A
• Setup Resolution: Voltage: 10MV / Current: 1MA
• A low ripple and noise
• Has knob lock feature
• Lightweight and portable
• Built with a fully digital control

• Comes with user’s manual
• low ripple and noise
• High reliability
• High accuracy

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Buying Guide: What to Consider When Choose Bench Power Supply

1. Complete Ownership Expense

It is necessary to consider the price of the power supply, downtime manufacturing costs for calibration and maintenance, safety for your DUT and test instruments, and reliability when buying a power supply.
The seamless integration of the power supply into your application is essential to consider. Look for a manufacturer who will provide repair assistance and committed support during set-up and regular product usage.

2. Current Power Limiting

Current Power limits are a fantastic feature, mainly if you are a beginner. To safeguard your DC supply parts, this function helps you to set a specific current limit.

3. Number of Channels

Using a single output channel does the work in many situations, and it is more affordable. Multi-output power supplies are costlier but can be handy in cases where multiple supplies are required simultaneously.

4. Maximum Current and Voltage

It is necessary to know how much voltage and current bench power supply can produce and whether it can provide most of your projects with adequate power.

If you’re adding any voltage to your circuit, the power supply must keep up with the drawn current. You should aim for the power cover for the bench DC power supply. This displays the potential current values at various voltages that can be removed.

When it comes to bench power supplies, there are several choices to choose from. While brands and configurations differ, there are high-quality bench power supplies that stick out and will surely satisfy your needs if you need it for home or industrial use or other electronics-related ventures.
This list reveals the best-selling brands in the industry that you can discover. We have provided thorough feedback and descriptions that will help you make the right decision.


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