Bench Power Supplies

A bench power supply is an essential piece of equipment if you do a lot of electronics or other powered projects on your bench and need a reliable source of power at different voltages. They are very useful tools in testing circuits, as they allow you to adjust the voltage to a specific value depending on what project you are working on. A variable DC bench power supply also allows you to set a maximum current, so if there is a short circuit in your project the bench supply will shut down hopefully preventing any harm to some components in your project. Bench power supplies are versatile, accurate and stable and don’t cost too much.

When it comes to power you have 4 units to be aware of, Current, Voltage, Power and Resistance. It's very important that if you are supplying your circuit with some voltage, your supply can keep up with the current drawn.

Types Of Power Supplies

There are two basic types of power supplies in common use: linear and switch-mode. Both are available for use as bench DC power supplies.

Linear power supplies operate by rectifying AC line power to create DC and then filtering and regulating it to produce a user-selectable voltage or current levels. Linear supplies are heavier because the 50 Hz or 60 Hz transformer and associated filters are physically larger.

Switch-mode power supplies start out the same way, rectifying and filtering AC line input voltage, however, they chop (or "switch") the DC into high-frequency AC. Switch-mode power supplies are significantly smaller, lighter and more efficient than linear power supplies, so they have replaced linear supplies in many applications.

Areas of application:

  • General laboratory
  • Education
  • Industry
  • Research
  • Production
  • Workshops

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Description Price Output Voltage Bench Power Supply Type Model Number Output Current Number of Outputs Type Power Rating Supply Voltage Number of Displays Input Connector Output Connector Minimum Temperature Maximum Temperature Digital/Analogue
RS Stock No. 826-2701
Mfr. Part No.2231A-30-3
BrandKeithley
HK$8,344.67
Each
units
0 → 30V Triple Output DC Power Supply - 3A 3 Analogue, Digital 195W 110 → 230V ac 3 IEC 320 Binding Post Terminal 0°C +40°C Analogue, Digital
RS Stock No. 667-2581
Mfr. Part No.U8001A
HK$4,327.45
Each
units
0 → 30V Adjustable Power Supply - 3A 1 Digital 90W 110 V ac, 230V ac 2 IEC 320 Binding Post Terminal 0°C +55°C Digital
RS Stock No. 155-383
Mfr. Part No.PL155
BrandAim-TTi
HK$3,774.18
Each
units
0 → 15V Precision DC Power Supply - 0 → 5A 1 Digital 75W 115 V ac, 230V ac 2 IEC 320 Binding Post Terminal +5°C +40°C Digital
RS Stock No. 737-7186
Mfr. Part No.CPX400S
BrandAim-TTi
HK$7,672.92
Each
units
0 → 60V Adjustable Power Supply - 0 → 20A 1 Digital 420W 110 → 240V ac 2 IEC 320 Binding Post Terminal +5°C +40°C Digital
RS Stock No. 806-7492
Mfr. Part No.EA-PSI 9500-90 3U
HK$111,909.21
Each
units
0 → 500V Programmable DC Power Supply - 90A 1 Digital 15kW 340 → 460V ac 1 Wire Clamp Screw Terminal 0°C +50°C Digital
RS Stock No. 804-0419
Mfr. Part No.CPX200DP
BrandAim-TTi
HK$11,278.84
Each
units
0 → 60V Laboratory Power Supply - 0 → 10A 2 Digital 360W 110 → 240V ac 4 IEC 320 Binding Post Terminal +5°C +40°C Digital
RS Stock No. 117-6783
Mfr. Part No.PMX35-3A
HK$6,063.92
Each
units
35V Compact DC Power Supply - 3A 1 Digital 105W 100V ac 1 IEC 320 Binding Post Terminal 0°C +40°C Digital
RS Stock No. 705-5029
Mfr. Part No.PWS4305
BrandTektronix
HK$16,005.22
Each
units
0 → 30V Programmable DC Power Supply - 5A 1 Digital 150W 110 V ac, 220V ac 1 IEC 320 Binding Post Terminal 0°C +40°C Digital
RS Stock No. 805-2488
Mfr. Part No.EA-PSI 5080-20 A
HK$10,119.85
Each
units
0 → 80V Programmable DC Power Supply - 20A 1 Analogue, Digital 640W 90 → 264V ac 1 IEC 320 Binding Post Terminal 0°C +50°C Analogue, Digital
RS Stock No. 303-0363
Mfr. Part No.K-AT5V
BrandKert
HK$899.11
Each
units
24V Stabilised Power Supply - 4 A, 5A 1 Analogue - 230V ac - Schuko Plug Binding Post Terminal -10°C +40°C Analogue
RS Stock No. 102-6004
Mfr. Part No.EA-PSI 9500-10 DT
HK$29,070.40
Each
units
0 → 500V Programmable DC Power Supply - 10A 1 Digital 0 → 1500W 90 → 264V ac 1 IEC 320 Screw Terminal 0°C +50°C Digital
RS Stock No. 878-2078
Mfr. Part No.BK9206
HK$16,382.98
Each
units
150V Programmable DC Power Supply - 10A 1 Digital 600W 110 V ac, 220V ac 1 IEC 320 Binding Post Terminal 0°C +40°C Digital
RS Stock No. 756-8815
Mfr. Part No.EA-PS 2342-10B +3..6V/2A
HK$6,435.02
Each
units
0 → 42 V, 0 → 6V Laboratory Power Supply - 4 A, 10A 3 Digital 332W 90 → 264V ac 4 IEC 320 4 mm Safety Socket 0°C +50°C Digital
RS Stock No. 731-2858
Mfr. Part No.QPX1200S
BrandAim-TTi
HK$14,125.81
Each
units
0 → 60V Laboratory Power Supply - 0 → 50A 1 Digital 1.2kW 110 → 240V ac 1 IEC 320 Binding Post Terminal +5°C +40°C Digital
RS Stock No. 671-8845
Mfr. Part No.N8761A
HK$67,600.35
Each
units
0 → 300V Programmable DC Power Supply - 17A 1 Digital 5.1kW 342 → 460V ac 2 Wire Clamp Screw Terminal 0°C +55°C Digital
RS Stock No. 665-4886
Mfr. Part No.EL302R
BrandAim-TTi
HK$2,398.72
Each
units
0 → 30V Laboratory Power Supply - 0 → 2A 1 Digital 60W 115 V ac, 230V ac 2 IEC 320 Binding Post Terminal +5°C +40°C Digital
RS Stock No. 705-5013
Mfr. Part No.PWS2326
BrandTektronix
HK$5,696.84
Each
units
0 → 30V Adjustable Power Supply - 6A 1 Digital - 110 V ac, 220V ac 2 IEC 320 Binding Post Terminal 0°C +40°C Digital
RS Stock No. 499-0991
Mfr. Part No.HM7042-5
HK$9,883.51
Each
units
0 → 30V Triple Power Supply - 2 A, 5A 3 Digital 250W 115 V ac, 230V ac 3 IEC 320 4 mm Safety Socket 0°C +40°C Digital
RS Stock No. 756-8812
Mfr. Part No.EA-PS 2342-06B +3..6V/2A
HK$5,650.79
Each
units
0 → 42 V, 0 → 6V Laboratory Power Supply - 4 A, 6A 3 Digital 212W 90 → 264V ac 4 IEC 320 4 mm Safety Socket 0°C +50°C Digital
RS Stock No. 805-2484
Mfr. Part No.EA-PSI 5040-40 A
HK$10,119.85
Each
units
0 → 40V Programmable DC Power Supply - 40A 1 Analogue, Digital 640W 90 → 264V ac 1 IEC 320 Binding Post Terminal 0°C +50°C Analogue, Digital