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.

2639 products

  • new
    B&K Precision MR100020 1000V/20A 5000W High Voltage Multi-Range DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision MR100020 1000V/20A 5000W High Voltage Multi-Range DC Power Supply

    AC & DC Power Supply Testers
    Condition : New
    $6,879
    $6,879 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 20 A
    • Voltage : 1 kV
    • Power : 5 kW
    Show Specs

    Model No : B&K

    Condition : New

    Manufacturer : B&K Precision

    Current : 20 A

    Voltage : 1 kV

    Power : 5 kW

    Request a Quote for EDU Discount
  • new
    B&K Precision 1697B 40V/5A 200W Programmable DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision 1697B 40V/5A 200W Programmable DC Power Supply

    AC & DC Power Supply Testers
    Condition : New
    $529
    $529 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 5 A
    • Voltage : 40 V
    • Power : 200 W
    Show Specs

    Model No : B&K

    Condition : New

    Manufacturer : B&K Precision

    Current : 5 A

    Voltage : 40 V

    Power : 200 W

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  • 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
    $2,210
    $2,210 $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

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  • new
    EL302RD Thurlby Thandar Instruments DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    EL302RD Thurlby Thandar Instruments DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $592
    $592 $0
    Specs
    • Manufacturer : Thurlby Thandar Instruments
    • Current : 2 A
    • Voltage : 30 V
    • Power : 120 W
    Show Specs

    Model No : EL302RD

    Condition : New

    Manufacturer : Thurlby Thandar Instruments

    Current : 2 A

    Voltage : 30 V

    Power : 120 W

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  • 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
    $352
    $352 $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

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  • new
    B&K Precision 8500B 150 V / 30 A / 300 W Programmable DC Electronic Load-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision 8500B 150 V / 30 A / 300 W Programmable DC Electronic Load

    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 : B&K

    Condition : New

    Volts : 150 V

    Amps : 30 A

    Type : Single

    Power : 300 W

    Manufacturer : B&K Precision

    Request a Quote for EDU Discount
  • 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

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    Sold out
  • Keysight E36104B 35 V, 1 A, 35 W Single-Output DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    Keysight E36104B 35 V, 1 A, 35 W Single-Output DC Power Supply

    AC & DC Power Supply Testers
    Condition : Factory New
    $1,376
    $1,376 $0
    Specs
    • Condition : Factory New
    • Manufacturer : Keysight
    • Dcsup_amps : 1 A
    • Dcsup_volts : 35 V
    • Dcsup_watts : 35 W
    Show Specs

    Model No : Keysight

    Condition : Factory New

    Manufacturer : Keysight

    Dcsup_amps : 1 A

    Dcsup_volts : 35 V

    Dcsup_watts : 35 W

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  • Keysight N8731A 8 V/400 A 3.3 kW System DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    Keysight N8731A 8 V/400 A 3.3 kW System DC Power Supply

    AC & DC Power Supply Testers
    Condition : Factory New
    $7,624
    $7,624 $0
    Specs
    • Condition : Factory New
    • Manufacturer : Keysight Technologies
    • Dcsup_amps : 400 A
    • Dcsup_volts : 8 V
    • Dcsup_watts : 3200 W
    Show Specs

    Model No : Keysight

    Condition : Factory New

    Manufacturer : Keysight Technologies

    Dcsup_amps : 400 A

    Dcsup_volts : 8 V

    Dcsup_watts : 3200 W

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  • new
    Keysight EL34243A 150V 60A 600W Dual-Input DC Electronic Load-ValueTronics
    AC & DC Power Supply Testers

    Keysight EL34243A 150V 60A 600W Dual-Input DC Electronic Load

    AC & DC Power Supply Testers
    Condition : New
    $5,155
    $5,155 $0
    Specs
    • Volts : 150 V
    • Amps : 60 A
    • Type : Single
    • Power : 300 W
    • Manufacturer : Keysight
    Show Specs

    Model No : Keysight

    Condition : New

    Volts : 150 V

    Amps : 60 A

    Type : Single

    Power : 300 W

    Manufacturer : Keysight

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  • Keysight N6744B 35 V, 3 A, 100 W DC Power Module-ValueTronics
    AC & DC Power Supply Testers

    Keysight N6744B 35 V, 3 A, 100 W DC Power Module

    AC & DC Power Supply Testers
    Condition : Factory New
    $1,567
    $1,567 $0
    Specs
    • Condition : Factory New
    • Manufacturer : Keysight
    • Dcsup_amps : 3 A
    • Dcsup_volts : 35 V
    • Dcsup_watts : 100 W
    • Plugin_type : DC Power Module
    Show Specs

    Model No : Keysight

    Condition : Factory New

    Manufacturer : Keysight

    Dcsup_amps : 3 A

    Dcsup_volts : 35 V

    Dcsup_watts : 100 W

    Plugin_type : DC Power Module

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  • new
    E3632A Keysight DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    E3632A Keysight DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $1,909
    $1,909 $0
    Specs
    • Manufacturer : Keysight
    • Current : 4 A
    • Voltage : 30 V
    • Power : 120 W
    Show Specs

    Model No : E3632A

    Condition : New

    Manufacturer : Keysight

    Current : 4 A

    Voltage : 30 V

    Power : 120 W

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  • Keysight E36234A 60V/10A 400W Dual Output Autoranging DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    Keysight E36234A 60V/10A 400W Dual Output Autoranging DC Power Supply

    AC & DC Power Supply Testers
    Condition : Factory New
    $4,054
    $4,054 $0
    Specs
    • Condition : Factory New
    • Manufacturer : Keysight Technologies
    • Dcsup_amps : 10 A
    • Dcsup_volts : 60 V
    • Dcsup_watts : 400 W
    Show Specs

    Model No : Keysight

    Condition : Factory New

    Manufacturer : Keysight Technologies

    Dcsup_amps : 10 A

    Dcsup_volts : 60 V

    Dcsup_watts : 400 W

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  • Keysight N6700C Low-Profile Modular Power System Mainframe (400 W)-New-ValueTronics
    AC & DC Power Supply Testers

    Keysight N6700C Low-Profile Modular Power System Mainframe (400 W)-New

    AC & DC Power Supply Testers
    Condition : Factory New
    $4,102
    $4,102 $0
    Specs
    • Condition : Factory New
    • Manufacturer : Keysight
    • Dcsup_watts : 300 W
    Show Specs

    Model No : Keysight

    Condition : Factory New

    Manufacturer : Keysight

    Dcsup_watts : 300 W

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  • new
    AFV-S-2500 Preen AC Source New-ValueTronics
    AC & DC Power Supply Testers

    AFV-S-2500 Preen AC Source New

    AC & DC Power Supply Testers
    Condition : New
    $3,960
    $3,960
    Specs
    • Manufacturer : Preen
    • Frequency : 500 Hz
    • Phase : 1
    • Power (va) : 2.5 kVA
    • Volts : 100 mV
    Show Specs

    Model No : AFV-S-2500

    Condition : New

    Manufacturer : Preen

    Frequency : 500 Hz

    Phase : 1

    Power (va) : 2.5 kVA

    Volts : 100 mV

    Request a Quote for EDU Discount
  • new
    B&K Precision 9242-GPIB Multi-Range DC Power Supply, 60V/10A 200W with GPIB-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision 9242-GPIB Multi-Range DC Power Supply, 60V/10A 200W with GPIB

    AC & DC Power Supply Testers
    Condition : New
    $1,779
    $1,779 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 10 A
    • Voltage : 60 V
    • Power : 200 W
    Show Specs

    Model No : B&K

    Condition : New

    Manufacturer : B&K Precision

    Current : 10 A

    Voltage : 60 V

    Power : 200 W

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  • used
    APS-7050 Instek AC Source Used-ValueTronics
    AC & DC Power Supply Testers

    APS-7050 Instek AC Source Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : Instek
    • Frequency : 550 Hz
    • Phase : 1
    • Power (va) : 500 VA
    • Volts : 310 V
    Show Specs

    Model No : APS-7050

    Condition : Used

    Manufacturer : Instek

    Frequency : 550 Hz

    Phase : 1

    Power (va) : 500 VA

    Volts : 310 V

    Request a Quote for EDU Discount
    Sold out
  • new
    ADG-L-1000-45-15 Preen DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    ADG-L-1000-45-15 Preen DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $8,880
    $8,880 $0
    Specs
    • Manufacturer : Preen
    • Current : 45 A
    • Voltage : 1 kV
    • Power : 15 kW
    Show Specs

    Model No : ADG-L-1000-45-15

    Condition : New

    Manufacturer : Preen

    Current : 45 A

    Voltage : 1 kV

    Power : 15 kW

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    Sold out
  • new
    63003-150-40 Chroma DC Electronic Load New-ValueTronics
    AC & DC Power Supply Testers

    63003-150-40 Chroma DC Electronic Load New

    AC & DC Power Supply Testers
    Condition : New
    Save $349.43
    $1,489.68
    $1,489.68 $1,839.11
    Specs
    • Volts : 150 V
    • Amps : 40 A
    • Type : Single
    • Power : 250 W
    • Manufacturer : Chroma
    Show Specs

    Model No : 63003-150-40

    Condition : New

    Volts : 150 V

    Amps : 40 A

    Type : Single

    Power : 250 W

    Manufacturer : Chroma

    Add to Quote Request a Quote for EDU Discount
    Sale
  • used
    9801 B&K Precision AC Source Used-ValueTronics
    AC & DC Power Supply Testers

    9801 B&K Precision AC Source Used

    AC & DC Power Supply Testers
    Condition : Used
    Specs
    • Manufacturer : B&K Precision
    • Frequency : 500 Hz
    • Phase : 1
    • Power (va) : 300 VA
    • Volts : 300 V
    Show Specs

    Model No : 9801

    Condition : Used

    Manufacturer : B&K Precision

    Frequency : 500 Hz

    Phase : 1

    Power (va) : 300 VA

    Volts : 300 V

    Add to Quote Request a Quote for EDU Discount
    Sold out
  • new
    B&K Precision 9131C Programmable Triple Output DC Power Supply, 30V/6A + 30V/6A + 5V/3A, 375W-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision 9131C Programmable Triple Output DC Power Supply, 30V/6A + 30V/6A + 5V/3A, 375W

    AC & DC Power Supply Testers
    Condition : New
    $1,960
    $1,960 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 6 A
    • Voltage : 30 V
    • Power : 375 W
    Show Specs

    Model No : B&K

    Condition : New

    Manufacturer : B&K Precision

    Current : 6 A

    Voltage : 30 V

    Power : 375 W

    Add to Quote Request a Quote for EDU Discount
  • GW Instek PSS-3203 96W Single Output Programmable Linear DC Power Supply (Pre-Owned)-ValueTronics
    AC & DC Power Supply Testers

    GW Instek PSS-3203 96W Single Output Programmable Linear DC Power Supply (Pre-Owned)

    AC & DC Power Supply Testers
    Condition : Pre-Owned
    Specs
    • Condition : Pre-Owned
    • Manufacturer : GW Instek
    • Dcsup_amps : 3A
    • Dcsup_volts : 32V
    • Dcsup_watts : 96W
    Show Specs

    Model No : GW

    Condition : Pre-Owned

    Manufacturer : GW Instek

    Dcsup_amps : 3A

    Dcsup_volts : 32V

    Dcsup_watts : 96W

    Add to Quote Request a Quote for EDU Discount
    Sold out
  • new
    DP813 Rigol DC Power Supply New-ValueTronics
    AC & DC Power Supply Testers

    DP813 Rigol DC Power Supply New

    AC & DC Power Supply Testers
    Condition : New
    $669
    $669 $0
    Specs
    • Manufacturer : Rigol
    • Current : 20 A
    • Voltage : 40 V
    • Power : 200 W
    Show Specs

    Model No : DP813

    Condition : New

    Manufacturer : Rigol

    Current : 20 A

    Voltage : 40 V

    Power : 200 W

    Add to Quote Request a Quote for EDU Discount
  • new
    B&K Precision 9206B 150V/25A 600W Multi-Range Programmable DC Power Supply-ValueTronics
    AC & DC Power Supply Testers

    B&K Precision 9206B 150V/25A 600W Multi-Range Programmable DC Power Supply

    AC & DC Power Supply Testers
    Condition : New
    $2,225
    $2,225 $0
    Specs
    • Manufacturer : B&K Precision
    • Current : 10 A
    • Voltage : 150 V
    • Power : 600 W
    Show Specs

    Model No : B&K

    Condition : New

    Manufacturer : B&K Precision

    Current : 10 A

    Voltage : 150 V

    Power : 600 W

    Request a Quote for EDU Discount

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.