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

945 Products showing for Bench Power Supplies & Sources

1 of 48
Stocked by manufacturer
Keysight Technologies Analogue Bench Power Supply, 3-Output 600V, 5.1 kW, 8.5 A Max
  • RS Stock No. 263-8616
  • Mfr. Part No. N8762A
Subtotal (1 unit)
HK$88,174.90
HK$88,174.90/unit
In Stock
Keysight Technologies Digital Bench Power Supply, 5-Output 0 V ac to 30V, 200 W, 20 A Max
  • RS Stock No. 187-3436
  • Mfr. Part No. E36231A
Subtotal (1 unit)
HK$18,866.42
HK$18,866.42/unit
In Stock
Aim-TTi Digital Bench Power Supply, 2-Output 0 V ac to 60V, 840 W, 20 A Max
  • RS Stock No. 731-2842
  • Mfr. Part No. CPX400D
Subtotal (1 unit)
HK$14,482.80
HK$14,482.80/unit
In Stock
Keysight Technologies Bench Power Supply, 4-Output 32 V to 32V, 400 W, 10 A Max
  • RS Stock No. 554-913
  • Mfr. Part No. E36441A
Subtotal (1 unit)
HK$28,319.00
HK$28,319.00/unit
Stocked by manufacturer
RIGOL Digital Power Supply, 2-Output 0 V to 60V, 140 W, 1 A Max
  • RS Stock No. 781-317
  • Mfr. Part No. DP821A
Subtotal (1 unit)
HK$6,458.60
HK$6,458.60/unit
In Stock
RS PRO Digital Bench Power Supply, 5-Output 0 V dc to 30V dc, 150 W, 5 A Max
  • RS Stock No. 175-7368
Subtotal (1 unit)
HK$1,526.80
HK$1,526.80/unit
In Stock
EA Elektro-Automatik Digital Bench Power Supply, 1-Output 0 V to 80V, 1000 W, 340 A Max
  • RS Stock No. 264-7217
  • Mfr. Part No. EA-PSI 10080-340 3U
Subtotal (1 unit)
HK$111,614.00
HK$111,614.00/unit
Stocked by manufacturer
RIGOL Digital Power Supply, 1-Output 0 V to 20V, 200 W, 10 A Max
  • RS Stock No. 781-406
  • Mfr. Part No. DP811A
Subtotal (1 unit)
HK$6,458.60
HK$6,458.60/unit
In Stock
RS PRO Digital Bench Power Supply, 5-Output 0 V to 250V, 100 W, 2 A Max
  • RS Stock No. 180-4809
Subtotal (1 unit)
HK$8,444.90
HK$8,444.90/unit
In Stock
Aim-TTi Digital Bench Power Supply, 1-Output 0 V ac to 120V, 90 W, 750 mA Max
  • RS Stock No. 707-2866
  • Mfr. Part No. PLH120
Subtotal (1 unit)
HK$5,753.60
HK$5,753.60/unit
In Stock
BK Precision Digital Bench Power Supply, 4-Output, 1.2 kW
  • RS Stock No. 339-138
  • Mfr. Part No. MPS1001
Subtotal (1 unit)
HK$43,423.90
HK$43,423.90/unit
In Stock
EA Elektro-Automatik Digital Bench Power Supply, 1-Output 0 V to 750V, 1500 W, 6 A Max
  • RS Stock No. 259-2990
  • Mfr. Part No. EA-PSI 10750-06 2U
Subtotal (1 unit)
HK$53,340.20
HK$53,340.20/unit
In Stock
RS PRO Digital Bench Power Supply, 5-Output 0 V to 250V, 100 W, 2 A Max
  • RS Stock No. 180-4808
Subtotal (1 unit)
HK$8,187.20
HK$8,187.20/unit
In Stock
Rohde & Schwarz Digital Bench Power Supply, 2-Output 32 V to 32V, 188 W, 10 A Max
  • RS Stock No. 174-2915
  • Mfr. Part No. HMP2020
Subtotal (1 unit)
HK$20,327.40
HK$20,327.40/unit
In Stock
Keithley 2450 Series Source Meter, ±20 mV to ±200 V, ±10 nA to ±1 A, 20W Output
  • RS Stock No. 781-2964
  • Mfr. Part No. 2450
Subtotal (1 unit)
HK$83,138.20
HK$83,138.20/unit
Stocked by manufacturer
RIGOL Digital Power Supply, 1-Output 0 V to 30V, 150 W, 5 A Max
  • RS Stock No. 781-415
  • Mfr. Part No. DP711
Subtotal (1 unit)
HK$2,572.30
HK$2,572.30/unit
Limited stock
Fluke 715 Current & Voltage Calibrator, Max Voltage 20V 20 mA
  • RS Stock No. 263-2700
  • Mfr. Part No. FLUKE 715
Subtotal (1 unit)
HK$17,031.90
HK$17,031.90/unit
Temporarily out of stock
TDK-Lambda Analogue Bench Power Supply 40 V to 40V, 1.52 kW, 38 A Max
  • RS Stock No. 325-690
  • Mfr. Part No. GEN40-38/LN
Subtotal (1 unit)
HK$31,392.50
HK$31,392.50/unit
Stocked by manufacturer
BK Precision Bench Power Supply, 1-Output 0 V ac to 60V, 120 W, 2 A Max
  • RS Stock No. 878-2072
  • Mfr. Part No. BK1715A
Subtotal (1 unit)
HK$6,391.40
HK$6,391.40/unit
In Stock
RS PRO Digital Bench Power Supply, 4-Output 0 V to 5V, 217 W, 5 A Max
  • RS Stock No. 288-9855
Subtotal (1 unit)
HK$8,039.80
HK$8,039.80/unit
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