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    Bench Power Supplies & Sources

    This handy piece of equipment is used when a power source is required that can be set up on the workbench, with its own power cord and method of output connection. They're useful in electronics for applications such as testing circuits that need a power source at different voltages.

    Variable power supplies

    Bench power supplies are available in variable or fixed voltage. A variable power supply will offer the ability to adjust the output, be that voltage, resistance, current or power and is ideal where versatility is required in an application, such as circuit testing. Variable power supplies have a feature called Current Limiting so it will shut down or limit current to the maximum rating. They normally have controls to allow the change of current from zero to the specified maximum current which helps to protect components.

    Linear and switching power supplies

    Bench power supplies are available in two different designs:

    • Linear Power Supplies – electrical or ripple noise is lower and easier to contain. Linear power supplies are more suitable for powering sensitive circuitry and generate more heat, resulting in lower energy efficiency. Linear supplies are heavier because the 50 Hz or 60 Hz transformer and associated filters are physically larger.
    • Switching Power Supplies – normally a better option for portable applications and they are lighter and more compact units. Switch-mode power supplies start out the same way as Linear, rectifying and filtering AC line input voltage, however they "switch" the DC into high-frequency AC. Switching power supplies can also tolerate small losses of power without affecting output, unlike Linear power supplies and be more energy efficient.

    Choosing a Bench Power Supply

    Wondering how many channels you need? Will depend on how many supplies you want to use simultaneously, but at least two channels are normal practise for a bench power supply.

    • Energy efficiency – normally detailed in the specifications or supplier's datasheet.
    • Line Regulation – Expressed as a percentage, this shows change in the output voltage relative to changes in the input line voltage.
    • Load Regulation – is the measure to ensure that the output voltage is constant despite load variations. A good load regulation ensures that output voltage doesn't fluctuate when loads increase or are removed. This is important where test results cannot be repeated.
    Bench Power Supplies
    Bench Power Supplies
    Bench Power Supply & Source Accessories
    Bench Power Supply & Source Accessories
    Current & Voltage Calibrators
    Current & Voltage Calibrators
    Electronic Load Software
    Electronic Load Software
    Electronic Loads
    Electronic Loads
    Load Banks
    Load Banks
    Source Meters
    Source Meters

    825 Products showing for Bench Power Supplies & Sources

    1 of 42
    EA Elektro-Automatik EA-PS 10000 Series Bench Power Supply, 0 → 80V, 0 → 120A, 1-Output, 3kW
    • RS Stock No. 259-2951
    • Mfr. Part No. EA-PS 10080-120 2U
    Each
    SGD7,016.26
    RS PRO Digital Bench Power Supply, 0 → 30V, 0 → 5A, 1-Output, 150W
    • RS Stock No. 175-7367
    Each
    SGD291.72
    RS PRO Digital Bench Power Supply, 0 → 60V, 0 → 5A, 1-Output, 300W
    • RS Stock No. 175-7365
    Each
    SGD467.68
    RS PRO Digital Bench Power Supply, 0 → 30V, 0 → 5A, 1-Output, 150W
    • RS Stock No. 175-7368
    Each
    SGD274.81
    RS PRO Electronic Load, 0 → 150 W, 0 → 120 V, 0 → 30 A
    • RS Stock No. 201-8211
    Each
    SGD702.11
    Keysight Technologies E36200 Series Digital Bench Power Supply, 0 → 60V, 0 → 10A, 2-Output, 400W
    • RS Stock No. 187-3439
    • Mfr. Part No. E36234A
    Each
    SGD5,665.03
    BK Precision 8500 Series Electronic DC Load, 0 → 150 W, 0.1 → 60 V, 0 → 30 A
    • RS Stock No. 817-2210
    • Mfr. Part No. BK8540
    Each
    SGD1,107.02
    RS PRO Digital Bench Power Supply, 0 → 30V, 0 → 5A, 3-Output
    • RS Stock No. 180-8785
    Each
    SGD594.28
    Keysight Technologies E363XA Series Digital Bench Power Supply, 0 → 50V, 4A, 1-Output, 175W
    • RS Stock No. 501-229
    • Mfr. Part No. E3634A
    Each
    SGD4,573.03
    EA Elektro-Automatik EA-PS 2000 B Series Digital Bench Power Supply, 0 → 42V, 20A, 1-Output, 320W
    • RS Stock No. 756-8821
    • Mfr. Part No. EA-PS 2042-20B
    Each
    SGD983.16
    Keysight Technologies E364XA Series Digital Bench Power Supply, 0 → 60V, 1.1A, 1-Output, 80W
    • RS Stock No. 667-7381
    • Mfr. Part No. E3645A
    Each
    SGD2,114.32
    Extech PRC15 Current & Voltage Calibrator, Max Voltage 19.99V, Max Current 50mA
    • RS Stock No. 287-3828
    • Mfr. Part No. PRC15
    Each
    SGD841.80
    Aim-TTi QPX Series Digital Bench Power Supply, 0 → 80V, 0 → 50A, 2-Output, 1.2kW
    • RS Stock No. 731-2855
    • Mfr. Part No. QPX600D
    Each
    SGD3,133.59
    RS PRO Digital Bench Power Supply, 0 → 60V, 0 → 5A, 1-Output, 300W
    • RS Stock No. 175-7366
    Each
    SGD542.75
    Keysight Technologies E36100B Series Digital Bench Power Supply, 0 → 6V, 5A, 1-Output, 30W
    • RS Stock No. 175-1801
    • Mfr. Part No. E36102B
    Each
    SGD1,922.14
    RS PRO Digital Bench Power Supply, 0 → 32V, 3A, 2-Output, 192W
    • RS Stock No. 122-5037
    Each
    SGD766.36
    BK Precision 8500B Series Electronic Load, 0 → 300 W, 0 → 150 V, 0 → 30 A
    • RS Stock No. 192-4570
    • Mfr. Part No. BK8500B
    Each
    SGD1,987.24
    RS PRO Digital Bench Power Supply, 0 → 30V, 3A, 2-Output, 180W
    • RS Stock No. 123-3565
    Each
    SGD704.37
    Aim-TTi QPX Series Digital Bench Power Supply, 0 → 80V, 0 → 50A, 1-Output, 750W
    • RS Stock No. 216-7768
    • Mfr. Part No. QPX750SP
    Each
    SGD2,806.99
    RS PRO Digital Bench Power Supply, 0 → 32V, 3A, 3-Output, 217W
    • RS Stock No. 122-5036
    Each
    SGD518.43
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