Power Supplies

We have a wide selection of power supply units (PSUs) for use in various domestic and industrial applications. Our range includes AC-DC power supply adapters and desktop computer power supply suitable for domestic applications, as well as bench power supplies, DIN Rail and panel mount power supplies and switch mode PSU.

What is a power supply?

Power supplies are a crucial aspect of any electrical equipment, providing reliable power to machinery, computers or other technology devices. A power supply changes a source electric current, such as a mains plug, to the correct voltage, frequency and current needed to operate the equipment safely.

How do power supplies work?

A power supply is used to reduce mains or three phase electricity, often at 240 Vac or 440 Vac down to a voltage that is usable, such as 12 Vdc. The PSU also converts the current rating, in the form of AMPS, to a level that is safe for the device that is to be powered.

What is the difference between the types of power supplies?

There are three main types of power supply: unregulated, linear and switch mode.

An unregulated power supply is the most basic type, they typically output a lot of ripple voltage (i.e. rapidly-varying instability) on the DC output power. If the input voltage varies, the output voltage will vary by a proportional amount. The advantage of an unregulated supply is that it's affordable, simple, and efficient.A linear power supply is similar in construction to an unregulated power supply, with the advantage of an added transistor circuit to regulate the output to a fixed voltage. A switch mode supply, also known as switching power supply, works by stabilising the mains electricity voltage in order to produce a clean, efficient and stable output voltage.

What is power supply efficiency?

Power supply efficiency is known as the amount of power actually provided to the internal circuitry, divided by the amount of power drawn from the mains supply. If a PSU is 50% efficient and is required to provide 50 Watts of power, 100 Watts will be drawn from the main supply. The extra 50 W is lost as heat. A 90% efficient PSU would draw 56 W in the same circumstances.

What industries can power supplies be used in?

Here are some common industries and environments power supplies can be used in:

  • Machine and panel building
  • Maintenance
  • Marine & offshore
  • Military & defence
  • Automotive
  • Electrical wiring
  • Domestic
  • Food and beverage
  • Manufacturing
AC/DC Adapters
AC/DC Adapters
DIN Rail Power Supplies
DIN Rail Power Supplies
Generators
Generators
Linear Power Supplies
Linear Power Supplies
PC Power Supplies
PC Power Supplies
PoE Injectors
PoE Injectors
Power Supply Accessories
Power Supply Accessories
Switching Power Supplies
Switching Power Supplies
Uninterruptible Power Supplies
Uninterruptible Power Supplies

9488 Products showing for Power Supplies

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1 of 475
In Stock
PULS DIMENSION DIN Rail Power Supply 240V ac AC Input 28V dc, 10 A Output DC 240 W
  • RS stock no. 915-9741
  • Mfr. Part No. CP10.241
Subtotal (1 unit)
R 4 735,29(exc. VAT)
R 4 735,29/unit
In Stock
MEAN WELL Switching Power Supply, MPM-10-24 24V dc, 420mA, 10 W, Input 80V ac to 264V ac
  • RS stock no. 174-8057
  • Mfr. Part No. MPM-10-24
Subtotal (1 unit)
R 199,47(exc. VAT)
R 199,47/unit
Being discontinued
Weidmüller PROeco Switched Mode DIN Rail Power Supply 370 V dc, 264V ac AC/DC Input 28V dc, 10 A Output DC 240 W
  • RS stock no. 923-6504
  • Mfr. Part No. 1469490000
Subtotal (1 unit)
R 3 576,25(exc. VAT)
R 3 576,25/unit
In Stock
RS Better World
Seasonic 750 W ATX Power Supply 240V ac 12V dc
  • RS stock no. 213-2368
  • Mfr. Part No. SSP-750RS
Subtotal (1 unit)
R 3 178,63(exc. VAT)
R 3 178,63/unit
In Stock
Delta Electronics 24V dc, 28 V dc Input DIN Rail Uninterruptible power supply, 240 VA, Chrome DC 240 W
  • RS stock no. 241-1636
  • Mfr. Part No. DRU-24V10ACZ
Subtotal (1 unit)
R 699,49(exc. VAT)
R 699,49/unit
In Stock
RS PRO Switched Mode DIN Rail Power Supply 264V ac 28V dc, 10 A Output DC 300 W
  • RS stock no. 136-8321
Subtotal (1 unit)
R 1 981,72(exc. VAT)
R 1 981,72/unit
In Stock
Omron S8VK-T Switched Mode DIN Rail Power Supply 480V ac AC Input 24V dc, 20 A Output DC 480 W
  • RS stock no. 843-2070
  • Mfr. Part No. S8VK-T48024
Subtotal (1 unit)
R 7 888,31(exc. VAT)
R 7 888,31/unit
In Stock
Phoenix Contact UNO POWER Switched Mode DIN Rail Power Supply 240V ac AC Input 24V dc, 10 A Output DC 240 W
  • RS stock no. 239-3639
  • Mfr. Part No. 1096432
Subtotal (1 unit)
R 3 079,67(exc. VAT)
R 3 079,67/unit
In Stock
MEAN WELL Switching Power Supply, IRM-10-5 5V dc, 2A, 10 W, Input 85V ac to 370 V dc, 264V ac
  • RS stock no. 135-8929
  • Mfr. Part No. IRM-10-5
Subtotal (1 unit)
R 158,51(exc. VAT)
R 158,51/unit
In Stock
RS PRO 20 W AC/AC Adapter AC/AC Adapter Type G 12V ac Output, 1.6 A
  • RS stock no. 139-1775
Subtotal (1 unit)
R 496,92(exc. VAT)
R 496,92/unit
In Stock
Phihong 2 Port 1 Port PoE Injector, 240V ac Input 60 W, 56V dc Output, 1.07 A
  • RS stock no. 204-7273
  • Mfr. Part No. POE60U-1BTE
Subtotal (1 unit)
R 1 673,04(exc. VAT)
R 1 673,04/unit
In Stock
RS PRO AC/DC Power Supply 27V dc, 502 W, Input 90V ac to 305V ac
  • RS stock no. 625-752
Subtotal (1 unit)
R 3 480,69(exc. VAT)
R 3 480,69/unit
In Stock
RS PRO 56YSD15S Switched Mode Power Supply DIN Rail Power Supply 264V ac 12V dc, 1.25 A Output 15 W
  • RS stock no. 225-9900
Subtotal (1 unit)
R 295,10(exc. VAT)
R 295,10/unit
In Stock
RS PRO 96 W AC/DC Adapter AC/DC Adapter 48V dc Output, 1.5 A
  • RS stock no. 255-2116
Subtotal (1 unit)
R 1 285,34(exc. VAT)
R 1 285,34/unit
In Stock
MEAN WELL Ultra Slim Switched Mode DIN Rail Power Supply 370 V dc, 264V ac AC/DC Input 24V dc, 1.5 A Output DC 36 W
  • RS stock no. 145-7868
  • Mfr. Part No. HDR-30-24
Subtotal (1 unit)
R 456,27(exc. VAT)
R 456,27/unit
In Stock
Eaton 190V ac, 276 V ac Input Stand Alone Uninterruptible power supply, 700 VA, 9SX 630 W
  • RS stock no. 201-9757
  • Mfr. Part No. 9SX700I Eaton 9SX 700i
Subtotal (1 unit)
R 20 998,73(exc. VAT)
R 20 998,73/unit
In Stock
RS Better World
APC 230V Input Stand Alone UPS Inverter, 950 VA, Back-UPS BX 520 W Back-UPS BX
  • RS stock no. 287-7246
  • Mfr. Part No. BX950MI
Subtotal (1 unit)
R 4 178,02(exc. VAT)
R 4 178,02/unit
In Stock
RS PRO Switched Mode DIN Rail Power Supply 264V ac 5.3V dc, 5 A Output DC Motor 30 W
  • RS stock no. 136-8304
Subtotal (1 unit)
R 558,23(exc. VAT)
R 558,23/unit
In Stock
RS Better World
ELC 230V ac Input DIN Rail Backup Module 0.2 W MS122402
  • RS stock no. 703-3432
  • Mfr. Part No. MS122402
Subtotal (1 unit)
R 1 666,19(exc. VAT)
R 1 666,19/unit
Limited stock
XP Power Switching Power Supply, ECM100UQ45 4 Output 12V, 10A, 100 W, Input 90V ac to 264V
  • RS stock no. 122-7033
  • Mfr. Part No. ECM100UQ45
Subtotal (1 unit)
R 2 814,08(exc. VAT)
R 2 814,08/unit
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