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

24282 Products showing for Power Supplies & Transformers

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1207 of 999+
In Stock
Recom Switching Regulator, Through Hole, 3.3V dc Output Voltage 32V dc, 2 A Output Current
  • RS Stock No. 139-2950P
  • Mfr. Part No. R-78B3.3-2.0
Subtotal 1 unit (supplied in a tube)
$17.54(exc. GST)
$17.54/unit
In Stock
Murata Power Solutions NMK DC/DC Converter, 12V dc/ 167 mA, 26.4V dc Input, 21.6V Input 2 W, Through Hole, 85 °C Max
  • RS Stock No. 796-2346P
  • Mfr. Part No. NMK2412SAC
Subtotal 1 unit (supplied in a tube)
$12.08(exc. GST)
$12.08/unit
Currently unavailable
ROHM Switching Regulator, Surface, 4.4V dc Output Voltage, 3 A Output Current
  • RS Stock No. 223-6153P
  • Mfr. Part No. BD9B331GWZ-E2
Subtotal 10 units (supplied on a continuous strip)
$33.05(exc. GST)
$3.305/unit
Temporarily out of stock
Recom RP08-AW DC/DC Converter, 3.3V dc/ 2.4 A, 24V dc Input, 9V Input 8 W, Through Hole, 78 °C Max Temp -40 °C Min Temp,
  • RS Stock No. 672-7329P
  • Mfr. Part No. RP08-243.3SAW
Subtotal 1 unit (supplied in a tube)
$72.61(exc. GST)
$72.61/unit
Temporarily out of stock
TRACOPOWER TMR 6WI DC/DC Converter, 3.3V dc/ 1.5 A, 36V dc Input, 9V Input 6 W, Through Hole, 84 °C Max Temp -40 °C Min
  • RS Stock No. 783-3393P
  • Mfr. Part No. TMR 6-2410WI
Subtotal 1 unit (supplied in a tube)
$33.61(exc. GST)
$33.61/unit
New product - Preorder today
TOKI TRADING Power Supply Power Supply 60 W 27V dc Output, 2.85 A
  • RS Stock No. 838-723
  • Mfr. Part No. SPU61A-108-3
Subtotal (1 unit)
$107.91(exc. GST)
$107.91/unit
In Stock
Recom Switching Regulator, Through Hole, 15V dc Output Voltage, 1 A Output Current
  • RS Stock No. 739-8307P
  • Mfr. Part No. R-78C15-1.0
Subtotal 1 unit (supplied in a tube)
$20.54(exc. GST)
$20.54/unit
Temporarily out of stock
Teltonika 4-Pin Plug Power Adapter Adapter 2-Pin 9 W 9V dc Output, 1 A
  • RS Stock No. 756-397
  • Mfr. Part No. PR3PUUK3
Subtotal (1 unit)
$21.11(exc. GST)
$21.11/unit
In Stock
TRACOPOWER TMR 3WIE DC/DC Converter, 12V dc/ 250 mA, 18V dc Input, 4.5V Input 3 W, Through Hole, 85 °C Max Temp -40 °C
  • RS Stock No. 770-2015P
  • Mfr. Part No. TMR 3-1212WIE
Subtotal 1 unit (supplied in a tube)
$24.52(exc. GST)
$24.52/unit
In Stock
Recom ROE DC/DC Converter, 5V dc/ 200 mA, 5V dc Input, 5V dc Input 1 W, Through Hole, 85 °C Max Temp -40 °C Min Temp,
  • RS Stock No. 777-3285P
  • Mfr. Part No. ROE-0505S
Subtotal 1 unit (supplied in a tube)
$5.45(exc. GST)
$5.45/unit
Temporarily out of stock
Recom REC6K-RW DC/DC Converter, 15V dc/ 400 mA, 75V dc Input, 18V dc Input 6 W, Through Hole, 105 °C Max Temp -40 °C Min
  • RS Stock No. 878-966
  • Mfr. Part No. REC6K-4815SRW
Subtotal (1 unit)
$15.19(exc. GST)
$15.19/unit
In Stock
Recom RSO DC/DC Converter, 5V dc/ 200 mA, 36V dc Input, 9V Input 1 W, Through Hole, 75 °C Max Temp -40 °C Min Temp,
  • RS Stock No. 828-9412P
  • Mfr. Part No. RSO-2405SZ
Subtotal 1 unit (supplied in a tube)
$30.72(exc. GST)
$30.72/unit
New product - Preorder today
TOKI TRADING Adapter Adapter 120 W 24V Output, 5 A
  • RS Stock No. 838-705
  • Mfr. Part No. PW-120A2-1Y240G-2
Subtotal (1 unit)
$179.85(exc. GST)
$179.85/unit
Temporarily out of stock
Teltonika 4-Pin Plug Power Adapter Adapter 2-Pin 9 W 9V dc Output, 1 A
  • RS Stock No. 756-396
  • Mfr. Part No. PR3PUEU3
Subtotal (1 unit)
$18.07(exc. GST)
$18.07/unit
In Stock
TRACOPOWER TEN 8 DC/DC Converter, 15V, -15 V/ 265 mA, 36V dc Input, 18V Input 8 W, PCB, 85 °C Max Temp -40 °C Min Temp,
  • RS Stock No. 423-9684P
  • Mfr. Part No. TEN 8-2423
Subtotal 1 unit (supplied in a tube)
$43.42(exc. GST)
$43.42/unit
Temporarily out of stock
XP Power QAM60T DC/DC Converter, 5V dc/ 12 A, 36V dc Input, 9V dc Input 60 W, Through Hole, 105 °C Max Temp -40 °C Min
  • RS Stock No. 904-275
  • Mfr. Part No. QAM60T24S05
Subtotal (1 unit)
$225.44(exc. GST)
$225.44/unit
Temporarily out of stock
Teltonika 4 Pin Power Supply Power Supply 2-Pin 130 W 50V dc Output, 2.6 A
  • RS Stock No. 756-282
  • Mfr. Part No. PR313US3
Subtotal (1 unit)
$163.25(exc. GST)
$163.25/unit
Temporarily out of stock
Recom REC6K-RW DC/DC Converter, 15V dc/ 400 mA, 36V dc Input, 9V dc Input 6 W, Through Hole, 105 °C Max Temp -40 °C Min
  • RS Stock No. 878-930
  • Mfr. Part No. REC6K-2415SRW
Subtotal (1 unit)
$15.19(exc. GST)
$15.19/unit
Temporarily out of stock
Teltonika 1 Port 1 Port PoE Injector, 240V ac Input 15 W, 52V dc Output, 350 mA
  • RS Stock No. 756-240
  • Mfr. Part No. PR322UK7
Subtotal (1 unit)
$69.38(exc. GST)
$69.38/unit
Last RS stock
TRACOPOWER THN 15N DC/DC Converter, 3.3V dc/ 4.5 A, 18V dc Input, 9V Input 15 W, Through Hole, 70 °C Max Temp -40 °C Min
  • RS Stock No. 183-0744P
  • Mfr. Part No. THN 15-1210N
Subtotal 1 unit (supplied in a tube)
$55.16(exc. GST)
$55.16/unit
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