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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

    855 Products showing for Bench Power Supplies & Sources

    1 of 43
    Keysight Technologies E36200 Series Digital Bench Power Supply, 0 → 60V, 0 → 10A, 1-Output, 200W
    • RS Stock No. 187-3437
    • Mfr. Part No. E36232A
    Each
    HK$16,319.10
    Keysight Technologies N6700 Series Digital Bench Power Supply, 0 → 60V, 17A, 1-Output, 500W
    • RS Stock No. 751-1661
    • Mfr. Part No. N6756A
    Each
    HK$34,451.50
    Aim-TTi MX Series Digital Bench Power Supply, 70V, 6A, 4-Output, 420W
    • RS Stock No. 274-0643
    • Mfr. Part No. MX100QP S2
    1 Box of 1
    HK$18,382.10
    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
    HK$11,907.50
    EA Elektro-Automatik EA-PS 9000 1U Series Analogue, Digital Bench Power Supply, 0 → 200V, 50A, 1-Output, 3kW
    • RS Stock No. 885-6652
    • Mfr. Part No. EA-PS 9200-50 1U
    Each
    HK$32,517.20
    EA Elektro-Automatik EA-PSI 10000 Series Analogue, Digital Bench Power Supply, 0 → 360V, 0 → 120A,
    • RS Stock No. 272-8783
    • Mfr. Part No. EA-PSI 10360-120 3U
    Each
    HK$141,541.30
    Keysight Technologies N6700 Series Bench Power Supply, 15V dc, ±4A, 2-Output, 80W
    • RS Stock No. 195-3193
    • Mfr. Part No. N6785A
    Each
    HK$92,232.30
    BK Precision 9172B Series Bench Power Supply, 0 → 70 V, 1.5 A, 3 A, 2-Output, 105 W
    • RS Stock No. 223-1576
    • Mfr. Part No. BK9172B
    Each
    HK$9,998.30
    Time Electronics 1044 Current & Voltage Calibrator, Max Voltage 20V, Max Current 20mA
    • RS Stock No. 757-560
    • Mfr. Part No. 1044
    Each
    HK$7,249.08
    RS PRO Electronic DC Load, 0 → 300 W, 0 → 150 V, 0 → 30 A
    • RS Stock No. 254-4056
    Each
    HK$9,101.66
    EA Elektro-Automatik EA-PS 5000 A Series Analogue, Digital Bench Power Supply, 0 → 200V, 10A, 1-Output, 640W
    • RS Stock No. 805-2469
    • Mfr. Part No. EA-PS 5200-10 A
    Each
    HK$10,882.47
    RS PRO Digital Bench Power Supply, 0 → 40V, 0 → 38A, 1-Output, 1.52kW
    • RS Stock No. 201-0444
    Each
    HK$20,222.00
    RS PRO Analogue, Digital Bench Power Supply, 0 → 160V, 0 → 7.2A, 1-Output, 360W
    • RS Stock No. 288-9870
    Each
    HK$16,221.92
    EA Elektro-Automatik Interface Module
    • RS Stock No. 801-1269
    • Mfr. Part No. EA-IF-AB-RS232
    Each
    HK$3,793.65
    Keithley 2400 Series Source Meter, ±200 mV → ±1000 V, 1-Channel, ±1 μA → ±1 A, 20 W Output
    • RS Stock No. 758-8866
    • Mfr. Part No. 2410.
    Each
    HK$163,555.00
    Rohde & Schwarz HMP Series Bench Power Supply, 0 → 32V, 10A, 4-Output, 384W
    • RS Stock No. 287-5603
    • Mfr. Part No. HMP4040COM
    Each
    HK$29,423.50
    RS PRO Digital Bench Power Supply, 0 → 60V, 6A, 1-Output, 360W
    • RS Stock No. 123-3579
    Each
    HK$4,455.30
    BK Precision 9111 Series Digital Bench Power Supply, 0 → 60V, 8A, 1-Output, 180W
    • RS Stock No. 878-2088
    • Mfr. Part No. BK9111
    Each
    HK$5,791.09
    BK Precision 9131C Series Bench Power Supply, 0 → 5V, 0 → 3A, 3-Output, 375W
    • RS Stock No. 240-6659
    • Mfr. Part No. BK9131C
    Each
    HK$16,587.60
    Keithley Series Source Meter, 200 V, 100 mA, 2.2 W Output
    • RS Stock No. 273-9479
    • Mfr. Part No. 6430
    Each
    HK$258,998.50
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