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

  • used
    6624A Agilent DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    6624A Agilent DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    $695
    $695 $0
    Specs
    • Manufacturer : Agilent
    • Current : 800 mA
    • Voltage : 50 V
    • Power : 40 W
    Show Specs

    Model No : 6624A

    Condition : Used

    Manufacturer : Agilent

    Current : 800 mA

    Voltage : 50 V

    Power : 40 W

  • new
    PSU 12.5-120 Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    PSU 12.5-120 Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $2,310
    $2,310 $0
    Specs
    • Manufacturer : Instek
    • Current : 120 A
    • Voltage : 12.5 V
    • Power : 1.5 kW
    Show Specs

    Model No : PSU

    Condition : New

    Manufacturer : Instek

    Current : 120 A

    Voltage : 12.5 V

    Power : 1.5 kW

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  • new
    PSW 30-36 Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    PSW 30-36 Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    Save $103.74
    $1,378.26
    $1,378.26 $1,482
    Specs
    • Manufacturer : Instek
    • Current : 36 A
    • Voltage : 30 V
    • Power : 360 W
    Show Specs

    Model No : PSW

    Condition : New

    Manufacturer : Instek

    Current : 36 A

    Voltage : 30 V

    Power : 360 W

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    Sale
  • new
    PSW 80-27 Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    PSW 80-27 Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,811
    $1,811 $0
    Specs
    • Manufacturer : Instek
    • Current : 27 A
    • Voltage : 80 V
    • Power : 720 W
    Show Specs

    Model No : PSW

    Condition : New

    Manufacturer : Instek

    Current : 27 A

    Voltage : 80 V

    Power : 720 W

    Add to Quote
  • new
    XLN3640 B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    XLN3640 B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $2,745
    $2,745 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 40 A
    • Voltage : 36 V
    • Power : 1.44 kW
    Show Specs

    Model No : XLN3640

    Condition : New

    Manufacturer : B&K Precision

    Current : 40 A

    Voltage : 36 V

    Power : 1.44 kW

    Add to Quote
  • new
    GPR-1820HD Instek DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    GPR-1820HD Instek DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $687
    $687 $0
    Specs
    • Manufacturer : Instek
    • Current : 20 A
    • Voltage : 18 V
    • Power : 360 W
    Show Specs

    Model No : GPR-1820HD

    Condition : New

    Manufacturer : Instek

    Current : 20 A

    Voltage : 18 V

    Power : 360 W

    Add to Quote
  • new
    XLN60026 B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    XLN60026 B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $2,979
    $2,979 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 2.6 A
    • Voltage : 600 V
    • Power : 1.56 kW
    Show Specs

    Model No : XLN60026

    Condition : New

    Manufacturer : B&K Precision

    Current : 2.6 A

    Voltage : 600 V

    Power : 1.56 kW

    Add to Quote
  • new
    1745A B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1745A B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $996
    $996 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 10 A
    • Voltage : 35 V
    • Power : 350 W
    Show Specs

    Model No : 1745A

    Condition : New

    Manufacturer : B&K Precision

    Current : 10 A

    Voltage : 35 V

    Power : 350 W

    Add to Quote
  • new
    9115-AT B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    9115-AT B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $3,550
    $3,550 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 60 A
    • Voltage : 80 V
    • Power : 1.2 kW
    Show Specs

    Model No : 9115-AT

    Condition : New

    Manufacturer : B&K Precision

    Current : 60 A

    Voltage : 80 V

    Power : 1.2 kW

    Add to Quote
  • new
    1735A B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1735A B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $562
    $562 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 3 A
    • Voltage : 30 V
    • Power : 90 W
    Show Specs

    Model No : 1735A

    Condition : New

    Manufacturer : B&K Precision

    Current : 3 A

    Voltage : 30 V

    Power : 90 W

    Add to Quote
  • new
    9116 B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    9116 B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $3,050
    $3,050 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 30 A
    • Voltage : 150 V
    • Power : 1.2 kW
    Show Specs

    Model No : 9116

    Condition : New

    Manufacturer : B&K Precision

    Current : 30 A

    Voltage : 150 V

    Power : 1.2 kW

    Add to Quote
  • new
    1623A B&K Precision DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    1623A B&K Precision DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $369
    $369 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 1.5 A
    • Voltage : 60 V
    • Power : 90 W
    Show Specs

    Model No : 1623A

    Condition : New

    Manufacturer : B&K Precision

    Current : 1.5 A

    Voltage : 60 V

    Power : 90 W

    Add to Quote
  • new
    8614 B&K Precision DC Electronic Load New-ValueTronics
    AC & DC Power Supply Testers

    8614 B&K Precision DC Electronic Load New

    AC & DC Power Supply Testers
    Condition : New
    Save $242.50
    $4,607.50
    $4,607.50 $4,850
    Specs
    • Volts : 120 V
    • Amps : 240 A
    • Type : Single
    • Power : 1.5 kW
    • Manufacturer : B&K Precision
    Show Specs

    Model No : 8614

    Condition : New

    Volts : 120 V

    Amps : 240 A

    Type : Single

    Power : 1.5 kW

    Manufacturer : B&K Precision

    Add to Quote
    Sale
  • new
    DCP36 Extech DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    DCP36 Extech DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $372.99
    $372.99 $0
    Specs
    • Manufacturer : Extech
    • Current : 5 A
    • Voltage : 36 V
    • Power : 80 W
    Show Specs

    Model No : DCP36

    Condition : New

    Manufacturer : Extech

    Current : 5 A

    Voltage : 36 V

    Power : 80 W

    Add to Quote
  • new
    382213 Extech DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    382213 Extech DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $275.99
    $275.99 $0
    Specs
    • Manufacturer : Extech
    • Current : 3 A
    • Voltage : 30 V
    • Power : 90 W
    Show Specs

    Model No : 382213

    Condition : New

    Manufacturer : Extech

    Current : 3 A

    Voltage : 30 V

    Power : 90 W

    Add to Quote
  • used
    EX354T Thurlby Thandar Instruments DC Power Supply Used-ValueTronics
    AC & DC Power Supply Testers

    EX354T Thurlby Thandar Instruments DC Power Supply Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Thurlby Thandar Instruments
    • Current : 5 A
    • Voltage : 35 V
    • Power : 305 W
    Show Specs

    Model No : EX354T

    Condition : Used

    Manufacturer : Thurlby Thandar Instruments

    Current : 5 A

    Voltage : 35 V

    Power : 305 W

    Add to Quote
    Sold out
  • new
    QPX1200SP Thurlby Thandar Instruments DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    QPX1200SP Thurlby Thandar Instruments DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,950
    $1,950 $0
    Specs
    • Manufacturer : Thurlby Thandar Instruments
    • Current : 50 A
    • Voltage : 60 V
    • Power : 1.2 kW
    Show Specs

    Model No : QPX1200SP

    Condition : New

    Manufacturer : Thurlby Thandar Instruments

    Current : 50 A

    Voltage : 60 V

    Power : 1.2 kW

    Add to Quote
  • new
    EL155R Thurlby Thandar Instruments DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    EL155R Thurlby Thandar Instruments DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $365
    $365 $0
    Specs
    • Manufacturer : Thurlby Thandar Instruments
    • Current : 5 A
    • Voltage : 15 V
    • Power : 75 W
    Show Specs

    Model No : EL155R

    Condition : New

    Manufacturer : Thurlby Thandar Instruments

    Current : 5 A

    Voltage : 15 V

    Power : 75 W

    Add to Quote
  • new
    EL561R Thurlby Thandar Instruments DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    EL561R Thurlby Thandar Instruments DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $311
    $311 $0
    Specs
    • Manufacturer : Thurlby Thandar Instruments
    • Current : 1.1 A
    • Voltage : 56 V
    • Power : 60 W
    Show Specs

    Model No : EL561R

    Condition : New

    Manufacturer : Thurlby Thandar Instruments

    Current : 1.1 A

    Voltage : 56 V

    Power : 60 W

    Add to Quote
  • new
    8500B B&K Precision DC Electronic Load New-ValueTronics
    AC & DC Power Supply Testers

    8500B B&K Precision DC Electronic Load New

    AC & DC Power Supply Testers
    Condition : New
    $1,405
    $1,405 $0
    Specs
    • Volts : 150 V
    • Amps : 30 A
    • Type : Single
    • Power : 300 W
    • Manufacturer : B&K Precision
    Show Specs

    Model No : 8500B

    Condition : New

    Volts : 150 V

    Amps : 30 A

    Type : Single

    Power : 300 W

    Manufacturer : B&K Precision

  • used
    PLZ70UA Kikusui DC Electronic Load Used-ValueTronics
    AC & DC Power Supply Testers

    PLZ70UA Kikusui DC Electronic Load Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Volts : 150 V
    • Amps : 15 A
    • Type : Module
    • Power : 70 W
    • Manufacturer : Kikusui
    Show Specs

    Model No : PLZ70UA

    Condition : Used

    Volts : 150 V

    Amps : 15 A

    Type : Module

    Power : 70 W

    Manufacturer : Kikusui

    Add to Quote
    Sold out
  • new
    N6744B Keysight DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    N6744B Keysight DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,402
    $1,402 $0
    Specs
    • Manufacturer : Keysight
    • Current : 3 A
    • Voltage : 35 V
    • Power : 100 W
    Show Specs

    Model No : N6744B

    Condition : New

    Manufacturer : Keysight

    Current : 3 A

    Voltage : 35 V

    Power : 100 W

    Add to Quote
  • new
    E36232A Keysight DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    E36232A Keysight DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,990
    $1,990 $0
    Specs
    • Manufacturer : Keysight
    • Current : 10 A
    • Voltage : 60 V
    • Power : 200 W
    Show Specs

    Model No : E36232A

    Condition : New

    Manufacturer : Keysight

    Current : 10 A

    Voltage : 60 V

    Power : 200 W

    Add to Quote
  • new
    2200-20-5 Keithley DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    2200-20-5 Keithley DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,540
    $1,540 $0
    Specs
    • Manufacturer : Keithley
    • Current : 5 A
    • Voltage : 20 V
    • Power : 100 W
    Show Specs

    Model No : 2200-20-5

    Condition : New

    Manufacturer : Keithley

    Current : 5 A

    Voltage : 20 V

    Power : 100 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.