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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 Loads
    Electronic Loads
    Load Banks
    Load Banks
    Source Meters
    Source Meters

    241 Products showing for Bench Power Supplies & Sources

    1 of 13
    RND 320-KD3005P Series Bench Power Supply, 1-Output
    • RS Stock No. 283-2741
    • Mfr. Part No. RND 320-KD3005P
    Each
    $265.17
    RS PRO Electronic Load, 0 → 300 W, 0 → 120 V, 0 → 30 A
    • RS Stock No. 180-8788
    Each
    $958.56
    RND RND 785 Series Bench Power Supply, 30V, 10A, 1-Output, 300W
    • RS Stock No. 491-776
    • Mfr. Part No. RND 785-00038
    Each
    $84.42
    Keysight Technologies EL30000 Series Electronic Load, 250 W, 150 V, 40 A
    • RS Stock No. 271-0115
    • Mfr. Part No. EL33133A
    Each
    $4,206.40
    Keysight Technologies E364XA Series Digital Bench Power Supply, 0 → 35V, 1.4 A, 800mA, 2-Output, 49W
    • RS Stock No. 667-7390
    • Mfr. Part No. E3649A
    Each
    $3,256.00
    Time Electronics 1030 Current & Voltage Calibrator, Max Voltage 1V, Max Current 100mA
    • RS Stock No. 610-348
    • Mfr. Part No. 1030
    Each
    $802.24
    GW Instek GPS Series Series Digital Bench Power Supply, 30V, 3A, 1-Output, 90W
    • RS Stock No. 284-4483
    • Mfr. Part No. GPS-3030DD
    Each
    $1,026.52
    Keysight Technologies E36200 Series Digital Bench Power Supply, 0 → 30V, 0 → 20A, 2-Output, 400W
    • RS Stock No. 187-3438
    • Mfr. Part No. E36233A
    Each
    $6,174.30
    RND 320-KD3005D Series Bench Power Supply, 1-Output
    • RS Stock No. 283-2740
    • Mfr. Part No. RND 320-KD3005D
    Each
    $218.93
    Keysight Technologies E36200 Series Digital Bench Power Supply, 0 → 30V, 0 → 20A, 1-Output, 200W
    • RS Stock No. 187-3436
    • Mfr. Part No. E36231A
    Each
    $3,383.60
    RND RND 785 Series Bench Power Supply, 60V, 3A, 1-Output, 180W
    • RS Stock No. 492-192
    • Mfr. Part No. RND 785-00039
    Each
    $81.85
    Keysight Technologies E36300 Series Digital Bench Power Supply, 0 → 6V, 1A, 3-Output, 80W
    • RS Stock No. 136-8574
    • Mfr. Part No. E36311A
    Each
    $2,635.60
    Keysight Technologies N6700 Series Digital Bench Power Supply, 0 → 35V, 3 A, 800mA, 1-Output, 100W
    • RS Stock No. 690-9675
    • Mfr. Part No. N6744B
    Each
    $2,382.60
    Keysight Technologies Triaxial Cable for Use with Fixture 16442A, Fixture 16442B, SMU
    • RS Stock No. 888-2403
    • Mfr. Part No. 16494A-003
    Each
    $452.10
    Time Electronics 1021 Multi Function Calibrator
    • RS Stock No. 617-636
    • Mfr. Part No. 1021
    Each
    $2,679.59
    Keysight Technologies EDU36311A Series Bench Power Supply, 0 → 30V, 1A, 3-Output, 90W
    • RS Stock No. 215-4791
    • Mfr. Part No. EDU36311A
    Each
    $1,728.10
    Arcol FFLB-5KW 230V Resistive Rack Mounted Load Bank, 5kW, 1.08 → 21.7 A
    • RS Stock No. 184-9572
    • Mfr. Part No. FFLB-5KW 230V
    Each
    $2,467.00
    Keysight Technologies N6700 Series Digital Bench Power Supply, 0 → 60V, 1.6A, 1-Output, 100W
    • RS Stock No. 690-9679
    • Mfr. Part No. N6745B
    Each
    $2,382.60
    Keysight Technologies N6700 Series Digital Bench Power Supply, 5V, 20A, 1-Output, 100W
    • RS Stock No. 690-9669
    • Mfr. Part No. N6741B
    Each
    $2,382.60
    Keysight Technologies Filter for Use with B2961/62B Source Measure Units (SMUs)
    • RS Stock No. 240-5331
    • Mfr. Part No. N1298C
    Each
    $2,633.40
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