Power Supplies & Transformers

RS offers 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 PSUs.

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 to be powered.

What is the difference between types of power supply?

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 power 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
Power Supplies
Power Supplies

Renewable Energy
Renewable Energy

Transformers
Transformers

Voltage Converters
Voltage Converters

27077 Products showing for Power Supplies & Transformers

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In Stock
MEAN WELL 120 W AC/DC Adapter 24V dc Output, 5 A
  • RS Stock No. 283-7427
  • Mfr. Part No. GST120A24-P1M
Subtotal (1 unit)
MYR192.60
MYR192.60/unit
In Stock
RS PRO 600W Power Inverter, 12V dc Input, 230V ac Output
  • RS Stock No. 816-0046
Subtotal (1 unit)
MYR406.33
MYR406.33/unit
In Stock
RS PRO Variac, 3 Output, 3 Phase 16.3 kVA, 415 V 0 to 415 V, 0 to 470 V
  • RS Stock No. 890-2869
Subtotal (1 unit)
MYR14,100.23
MYR14,100.23/unit
In Stock
Trendnet TI-S15052 Single Output DIN Rail Power Supply 300 V dc, 240V ac AC/DC Input 56V, 2.89 A Output DC 150 W
  • RS Stock No. 561-745
  • Mfr. Part No. TI-S15052
Subtotal (1 unit)
MYR530.07
MYR530.07/unit
In Stock
TP-Link 1 Port 2 Port PoE Injector, 100V, 240 V Input 30 W, 12V, 5 V Output, 1 A
  • RS Stock No. 275-3549
  • Mfr. Part No. TL-POE160S
Subtotal (1 unit)
MYR175.03
MYR175.03/unit
In Stock
MEAN WELL Switching Power Supply, RSP-1000-24 24V dc, 40A, 960 W, Input 90V ac to 370 V dc, 264V ac
  • RS Stock No. 150-843
  • Mfr. Part No. RSP-1000-24
Subtotal (1 unit)
MYR1,346.24
MYR1,346.24/unit
In Stock
PULS DIMENSION Switched Mode DIN Rail Power Supply 240V ac AC Input 28V dc, 5 A Output DC 120 W
  • RS Stock No. 627-6174
  • Mfr. Part No. CS5.241
Subtotal (1 unit)
MYR1,272.43
MYR1,272.43/unit
In Stock
Schneider Electric Phaseo Switched Mode DIN Rail Power Supply 240V ac AC Input 24V dc, 10 A Output DC 240 W
  • RS Stock No. 272-7440
  • Mfr. Part No. ABLU3A24100
Subtotal (1 unit)
MYR1,349.81
MYR1,349.81/unit
Limited stock
RS PRO Switching Power Supply 24V dc, 2.5A, 60 W, Input 88V ac to 370 V dc, 264V ac
  • RS Stock No. 711-2636
Subtotal (1 unit)
MYR395.87
MYR395.87/unit
In Stock
Ansmann 45 W AC/DC Adapter AC/DC Adapter EU 20V dc Output, 3 A
  • RS Stock No. 201-9791
  • Mfr. Part No. 1001-0095
Subtotal (1 unit)
MYR185.02
MYR185.02/unit
In Stock
APC UPS Replacement Battery Cartridge for use with Smart-UPS, UPS, Batterie de remplacement Series
  • RS Stock No. 779-4058
  • Mfr. Part No. RBC2
Subtotal (1 unit)
MYR491.92
MYR491.92/unit
In Stock
Eaton 184V ac, 276 V ac Input Stand Alone Uninterruptible power supply, 1500 VA, 5SC 1.05 kW
  • RS Stock No. 201-9779
  • Mfr. Part No. 5SC1500I Eaton 5SC 1500i
Subtotal (1 unit)
MYR5,230.92
MYR5,230.92/unit
In Stock
XP Power 120 W Power Adapter AC/DC Adapter IEC 24V dc Output, 5 A
  • RS Stock No. 122-9837
  • Mfr. Part No. VES120PS24
Subtotal (1 unit)
MYR279.27
MYR279.27/unit
In Stock
MEAN WELL Ultra Slim Switched Mode DIN Rail Power Supply 370 V dc, 264V ac AC/DC Input 5V dc, 2.4 A Output DC 12 W
  • RS Stock No. 145-7859
  • Mfr. Part No. HDR-15-5
Subtotal (1 unit)
MYR60.40
MYR60.40/unit
In Stock
MEAN WELL DDR-240 DC/DC Converter, 24V dc/ 10 A, 33.6V dc Input, 16.8V Input, DIN Rail 240 W, 70 °C Max Temp -40 °C Min
  • RS Stock No. 179-2846
  • Mfr. Part No. DDR-240B-24
Subtotal (1 unit)
MYR404.01
MYR404.01/unit
In Stock
Schneider Electric Switching Power Supply, ABLP1A24100 24V dc, 10A, 240 W, Input 100V ac to 240V ac
  • RS Stock No. 276-9130
  • Mfr. Part No. ABLP1A24100
Subtotal (1 unit)
MYR1,046.41
MYR1,046.41/unit
In Stock
MEAN WELL DDR-120 DC/DC Converter, 24V dc/ 4.2 A, 18V dc Input, 12V Input, DIN Rail 100.8 W, 70 °C Max Temp 70 °C Min
  • RS Stock No. 175-7786
  • Mfr. Part No. DDR-120A-24
Subtotal (1 unit)
MYR274.36
MYR274.36/unit
In Stock
RS PRO 1 Site Transformer 2.25 kVA, 230 V ac Primary, 110 V (55V-0V-55V) Secondary, 16 A O/P
  • RS Stock No. 122-6711
Subtotal (1 unit)
MYR912.74
MYR912.74/unit
In Stock
Siemens 2.5 kVA DIN Rail Transformer, 230 V ac, 400 V ac Primary, 42 V, 24 V Secondary, EN 61558-2-6, CUUS, -2-2, -2-1
  • RS Stock No. 480-4878
  • Mfr. Part No. 4AM4842-8JD40-0FA0
Subtotal (1 unit)
MYR1,938.91
MYR1,938.91/unit
In Stock
RS PRO 6 W AC/DC Adapter Type C 12V dc Output, 450 mA
  • RS Stock No. 139-1783
Subtotal (1 unit)
MYR69.64
MYR69.64/unit
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