AC & DC Power Supply Testers

Power supplies and electronic loads are vital tools for delivering and testing electrical power in a controlled, precise way. Commonly used in industries like aerospace, automotive, defense, semiconductors, and education, these tools power components, simulate real-world conditions, and verify system performance.

At ValueTronics, we carry a wide range of new and used AC and DC power supplies, electronic loads, and power supply testers from top brands like Keysight, Tektronix, Rigol, and B&K Precision. From basic benchtop models to programmable, high-performance systems, we offer solutions for a variety of test environments and budgets.

Browse our inventory to compare features and specs, or contact our team for help selecting the right equipment for your application.

2347 products

  • new
    GPR-30H10D Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    GPR-30H10D Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $593
    $593 $0
    Specs
    • Manufacturer : Instek
    • Current : 1 A
    • Voltage : 300 V
    • Power : 300 W
    Show Specs

    Model No : GPR-30H10D

    Condition : New

    Manufacturer : Instek

    Current : 1 A

    Voltage : 300 V

    Power : 300 W

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  • new
    GPD-4303S Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    GPD-4303S Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $630
    $630 $630
    Specs
    • Manufacturer : Instek
    • Current : 3 A
    • Voltage : 30 V
    • Power : 195 W
    Show Specs

    Model No : GPD-4303S

    Condition : New

    Manufacturer : Instek

    Current : 3 A

    Voltage : 30 V

    Power : 195 W

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  • new
    1761 B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1761 B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $970
    $970 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 3 A
    • Voltage : 35 V
    • Power : 350 W
    Show Specs

    Model No : 1761

    Condition : New

    Manufacturer : B&K Precision

    Current : 3 A

    Voltage : 35 V

    Power : 350 W

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  • new
    1670A B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1670A B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $339
    $339 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 3 A
    • Voltage : 30 V
    • Power : 200 W
    Show Specs

    Model No : 1670A

    Condition : New

    Manufacturer : B&K Precision

    Current : 3 A

    Voltage : 30 V

    Power : 200 W

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  • new
    8551 B&K Precision DC Electronic Load New-ValueTronics
    AC & DC Power Supply Testers

    8551 B&K Precision DC Electronic Load New

    AC & DC Power Supply Testers
    Condition : New
    $1,340
    $1,340 $0
    Specs
    • Volts : 150 V
    • Amps : 60 A
    • Type : Single
    • Power : 350 W
    • Manufacturer : B&K Precision
    Show Specs

    Model No : 8551

    Condition : New

    Volts : 150 V

    Amps : 60 A

    Type : Single

    Power : 350 W

    Manufacturer : B&K Precision

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  • new
    1655A B&K Precision AC Source New-ValueTronics
    AC & DC Power Supply Testers

    1655A B&K Precision AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $805
    $805 $0
    Specs
    • Manufacturer : B&K Precision
    • Frequency : 60 Hz
    • Phase : 3
    • Power (va) : 150 VA
    • Volts : 150 V
    Show Specs

    Model No : 1655A

    Condition : New

    Manufacturer : B&K Precision

    Frequency : 60 Hz

    Phase : 3

    Power (va) : 150 VA

    Volts : 150 V

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  • new
    2230-30-1 Keithley DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    2230-30-1 Keithley DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,830
    $1,830 $0
    Specs
    • Manufacturer : Keithley
    • Current : 1.5 A
    • Voltage : 30 V
    • Power : 120 W
    Show Specs

    Model No : 2230-30-1

    Condition : New

    Manufacturer : Keithley

    Current : 1.5 A

    Voltage : 30 V

    Power : 120 W

    Add to Quote
  • new
    APS-7050 Instek AC Source New-ValueTronics
    AC & DC Power Supply Testers

    APS-7050 Instek AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $2,607
    $2,607 $0
    Specs
    • Manufacturer : Instek
    • Frequency : 550 Hz
    • Phase : 1
    • Power (va) : 500 VA
    • Volts : 310 V
    Show Specs

    Model No : APS-7050

    Condition : New

    Manufacturer : Instek

    Frequency : 550 Hz

    Phase : 1

    Power (va) : 500 VA

    Volts : 310 V

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  • new
    GPD-2303S Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    GPD-2303S Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $295
    $295 $0
    Specs
    • Manufacturer : Instek
    • Current : 3 A
    • Voltage : 30 V
    • Power : 180 W
    Show Specs

    Model No : GPD-2303S

    Condition : New

    Manufacturer : Instek

    Current : 3 A

    Voltage : 30 V

    Power : 180 W

    Add to Quote
  • new
    1698B B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1698B B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $582
    $582 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 3.3 A
    • Voltage : 60 V
    • Power : 200 W
    Show Specs

    Model No : 1698B

    Condition : New

    Manufacturer : B&K Precision

    Current : 3.3 A

    Voltage : 60 V

    Power : 200 W

    Add to Quote
  • used
    XG60-28 Sorensen DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    XG60-28 Sorensen DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Sorensen
    • Current : 28 A
    • Voltage : 60 V
    • Power : 1.7 kW
    Show Specs

    Model No : XG60-28

    Condition : Used

    Manufacturer : Sorensen

    Current : 28 A

    Voltage : 60 V

    Power : 1.7 kW

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    Sold out
  • new
    2230-30-6 Keithley DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    2230-30-6 Keithley DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $2,560
    $2,560 $0
    Specs
    • Manufacturer : Keithley
    • Current : 6 A
    • Voltage : 30 V
    • Power : 375 W
    Show Specs

    Model No : 2230-30-6

    Condition : New

    Manufacturer : Keithley

    Current : 6 A

    Voltage : 30 V

    Power : 375 W

    Add to Quote
  • used
    GPS-1850 Instek DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    GPS-1850 Instek DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Instek
    • Current : 5 A
    • Voltage : 18 V
    • Power : 90 W
    Show Specs

    Model No : GPS-1850

    Condition : Used

    Manufacturer : Instek

    Current : 5 A

    Voltage : 18 V

    Power : 90 W

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    Sold out
  • new
    1901B-220V B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1901B-220V B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $930
    $930 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 30 A
    • Voltage : 32 V
    • Power : 960 W
    Show Specs

    Model No : 1901B-220V

    Condition : New

    Manufacturer : B&K Precision

    Current : 30 A

    Voltage : 32 V

    Power : 960 W

    Add to Quote
  • new
    AFV-P-2500B Preen AC Source New-ValueTronics
    AC & DC Power Supply Testers

    AFV-P-2500B Preen AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $4,810
    $4,810 $0
    Specs
    • Manufacturer : Preen
    • Frequency : 1 kHz
    • Phase : 1
    • Power (va) : 2.5 kVA
    • Volts : 310 V
    Show Specs

    Model No : AFV-P-2500B

    Condition : New

    Manufacturer : Preen

    Frequency : 1 kHz

    Phase : 1

    Power (va) : 2.5 kVA

    Volts : 310 V

    Add to Quote
  • new
    AFV-P-1250B Preen AC Source New-ValueTronics
    AC & DC Power Supply Testers

    AFV-P-1250B Preen AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $3,150
    $3,150 $0
    Specs
    • Manufacturer : Preen
    • Frequency : 1 kHz
    • Phase : 1
    • Power (va) : 1.25 kVA
    • Volts : 310 V
    Show Specs

    Model No : AFV-P-1250B

    Condition : New

    Manufacturer : Preen

    Frequency : 1 kHz

    Phase : 1

    Power (va) : 1.25 kVA

    Volts : 310 V

    Add to Quote
  • new
    AFV-P-600B Preen AC Source New-ValueTronics
    AC & DC Power Supply Testers

    AFV-P-600B Preen AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $2,240
    $2,240 $0
    Specs
    • Manufacturer : Preen
    • Frequency : 1 kHz
    • Phase : 1
    • Power (va) : 600 VA
    • Volts : 310 V
    Show Specs

    Model No : AFV-P-600B

    Condition : New

    Manufacturer : Preen

    Frequency : 1 kHz

    Phase : 1

    Power (va) : 600 VA

    Volts : 310 V

    Add to Quote
  • new
    1667 B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1667 B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $447
    $447 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 3.3 A
    • Voltage : 60 V
    • Power : 200 W
    Show Specs

    Model No : 1667

    Condition : New

    Manufacturer : B&K Precision

    Current : 3.3 A

    Voltage : 60 V

    Power : 200 W

    Add to Quote
  • new
    6221 Keithley Current Source New-ValueTronics
    AC & DC Power Supply Testers

    6221 Keithley Current Source New

    AC & DC Power Supply Testers
    Condition : New
    $9,230
    $9,230 $0
    Specs
    • Manufacturer : Keithley
    Show Specs

    Model No : 6221

    Condition : New

    Manufacturer : Keithley

    Add to Quote
  • used
    6303D Topward DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    6303D Topward DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Topward
    • Current : 3 A
    • Voltage : 30 V
    • Power : 205 W
    Show Specs

    Model No : 6303D

    Condition : Used

    Manufacturer : Topward

    Current : 3 A

    Voltage : 30 V

    Power : 205 W

    Add to Quote
  • used
    E3630A Agilent DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    E3630A Agilent DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Agilent
    • Current : 500 mA
    • Voltage : 20 V
    • Power : 35 W
    Show Specs

    Model No : E3630A

    Condition : Used

    Manufacturer : Agilent

    Current : 500 mA

    Voltage : 20 V

    Power : 35 W

    Add to Quote
    Sold out
  • new
    PSU 40-38 Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    PSU 40-38 Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    Save $115.50
    $2,194.50
    $2,194.50 $2,310
    Specs
    • Manufacturer : Instek
    • Current : 38 A
    • Voltage : 40 V
    • Power : 1.52 kW
    Show Specs

    Model No : PSU

    Condition : New

    Manufacturer : Instek

    Current : 38 A

    Voltage : 40 V

    Power : 1.52 kW

    Add to Quote
    Sale
  • new
    PSP-405 Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    PSP-405 Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $355
    $355 $0
    Specs
    • Manufacturer : Instek
    • Current : 5 A
    • Voltage : 40 V
    • Power : 200 W
    Show Specs

    Model No : PSP-405

    Condition : New

    Manufacturer : Instek

    Current : 5 A

    Voltage : 40 V

    Power : 200 W

    Add to Quote
  • new
    GPD-3303D Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    GPD-3303D Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $399
    $399 $0
    Specs
    • Manufacturer : Instek
    • Current : 3 A
    • Voltage : 30 V
    • Power : 195 W
    Show Specs

    Model No : GPD-3303D

    Condition : New

    Manufacturer : Instek

    Current : 3 A

    Voltage : 30 V

    Power : 195 W

    Add to Quote

Frequently Asked Questions

What are power supplies and electronic loads used for?
Power supplies and electronic loads are used to deliver, regulate, and simulate electrical power during product development, testing, and validation. Power supplies provide a stable voltage or current to a device under test (DUT), while electronic loads draw controlled power to simulate real-world operating conditions.

These tools are commonly used in applications such as circuit design, power system development, battery testing, and quality control. Engineers rely on them to verify performance, ensure safety, and replicate operational stresses in industries like aerospace, automotive (including EV testing), semiconductors, and education.
What types of power supplies are available?
There are several types of power supplies designed for different applications:

DC Power Supplies: Deliver constant direct current. Commonly used in circuit testing, battery charging, and electronics development.

AC Power Supplies: Provide alternating current. Ideal for simulating real-world power sources in appliances, motors, and industrial systems.

Programmable Power Supplies: Allow users to control voltage and current digitally. Used in automated testing and advanced simulations.

Modular Power Supplies: Feature multiple output channels. Useful for multi-device test environments and scalable setups.

ValueTronics carries both linear and switching models, with benchtop and rack-mounted options available from leading manufacturers.
What is the difference between linear and switching power supplies?
The main difference between linear and switching power supplies lies in how they convert and regulate voltage.

Linear Power Supplies: Use a transformer and linear regulator to provide clean, low-noise output. They are simple to use and ideal for sensitive analog or RF applications but tend to be larger, heavier, and less efficient.

Switching Power Supplies: Use high-frequency switching to regulate voltage, making them more compact and energy efficient. These are suitable for high-power or portable applications but may introduce more electrical noise compared to linear models.

Each type has its advantages depending on your application's size, efficiency, noise tolerance, and performance needs.
What is the difference between AC and DC power supplies?
AC and DC power supplies differ in the type of electrical output they provide.

AC Power Supplies: Output alternating current, where the flow of electricity periodically reverses direction. These are used to test devices that operate on standard mains power or require variable frequency and voltage conditions, such as motors, appliances, and power converters.

DC Power Supplies: Provide direct current, where electricity flows in a constant direction. These are commonly used in electronic circuit testing, battery charging, and powering digital systems or components.
How can the right power supply or load be selected for an application?
Selecting the right power supply or electronic load depends on several key factors:

Voltage and Current Requirements: Know the maximum and minimum values your device under test (DUT) needs to operate safely.

Load Type: Determine whether your application requires constant current, constant voltage, or a dynamic load profile.

Control and Programming Needs: Programmable units are ideal for automated testing, remote control, and data collection.

Form Factor: Benchtop models are suitable for labs or small workspaces. Rack-mounted options are better for larger systems or production lines.

Accuracy and Stability: Look for models with low ripple, precise regulation, and high resolution when working with sensitive electronics.

If you're unsure what fits your needs, ValueTronics can provide expert guidance and help you compare models from leading manufacturers.
Do power supplies come with built-in protection features?
Yes, most modern power supplies come equipped with built-in protection features to safeguard both the power supply and the device under test.

Common protection features include:
Overvoltage Protection (OVP): Prevents voltage from exceeding a set limit to avoid damaging connected components.

Overcurrent Protection (OCP): Limits the current output to protect against short circuits or excessive load.

Overtemperature Protection (OTP): Shuts down the unit or reduces output if internal temperatures rise too high.

Short Circuit Protection: Detects and responds to short circuits to prevent equipment failure or damage.