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

28508 Products showing for Power Supplies & Transformers

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In Stock
MEAN WELL NDR Switched Mode DIN Rail Power Supply 264V ac AC Input 48V dc, 5 A Output DC 240 W
  • RS Stock No. 122-2229
  • Mfr. Part No. NDR-240-48
Subtotal (1 unit)
PHP3,753.14(exc. VAT)
PHP3,753.14/unit
In Stock
Eaton 500 VA Chassis Mount Transformer, 24 V, CE, UL, CSA, IEC EN, VDE
  • RS Stock No. 255-315
  • Mfr. Part No. 221516 STN0,5(400/24)
Subtotal (1 unit)
PHP15,215.45(exc. VAT)
PHP15,215.45/unit
In Stock
Sollatek Voltage Stabiliser 230V ac 16 A, 3680VA
  • RS Stock No. 548-9420
  • Mfr. Part No. 98220060
Subtotal (1 unit)
PHP39,974.12(exc. VAT)
PHP39,974.12/unit
In Stock
RS Better World
APC Back-UPS BX 230V ac Input UPS, 1600 VA, BVX1600LI 900 W Floor 1 min 5 Outlets
  • RS Stock No. 287-7226
  • Mfr. Part No. BVX1600LI
Subtotal (1 unit)
PHP23,297.73(exc. VAT)
PHP23,297.73/unit
In Stock
RS PRO Variac, 1 Output, 1 Phase 240 VA, 240 V 240 V
  • RS Stock No. 890-2828
Subtotal (1 unit)
PHP11,628.08(exc. VAT)
PHP11,628.08/unit
In Stock
MEAN WELL, LRS-100-24 Switching Power Supply 24V dc, 108 W 373 V dc, 240V ac
  • RS Stock No. 106-5846
  • Mfr. Part No. LRS-100-24
Subtotal (1 unit)
PHP1,644.82(exc. VAT)
PHP1,644.82/unit
In Stock
Delta Electronics DRF-960W DIN Rail DIN Rail Power Supply 575V ac AC Input 24V dc, 40 A Output DC 960 W
  • RS Stock No. 281-2510
  • Mfr. Part No. DRF-24V960W3GBA
Subtotal (1 unit)
PHP21,445.22(exc. VAT)
PHP21,445.22/unit
Stocked by manufacturer
Eaton 2.5 kVA Chassis Mount Transformer, 230 V, IEC EN, CSA, CE, UL, VDE
  • RS Stock No. 248-214
  • Mfr. Part No. 036399 STI2,5(230/230)
Subtotal (1 unit)
PHP60,435.63(exc. VAT)
PHP60,435.63/unit
In Stock
PULS DIMENSION Switched Mode DIN Rail Power Supply 120V ac AC Input 28V dc, 10 A Output DC 240 W
  • RS Stock No. 627-6196
  • Mfr. Part No. CS10.242
Subtotal (1 unit)
PHP30,081.10(exc. VAT)
PHP30,081.10/unit
In Stock
RS PRO 600W Power Inverter, 12V dc Input, 230V ac Output
  • RS Stock No. 816-0046
Subtotal (1 unit)
PHP5,563.81(exc. VAT)
PHP5,563.81/unit
In Stock
Murrelektronik Limited 100 VA Safety Transformer, 400 V ac Primary, 24 V ac Secondary, EN 61558-2-4, EN 61558-2-6, EN
  • RS Stock No. 284-8050
  • Mfr. Part No. 86342
Subtotal (1 unit)
PHP5,094.12(exc. VAT)
PHP5,094.12/unit
In Stock
MEAN WELL TDR Switched Mode DIN Rail Power Supply 780 V dc, 550V ac AC/DC Input 24V dc, 20 A Output DC 480 W
  • RS Stock No. 145-7857
  • Mfr. Part No. TDR-480-24
Subtotal (1 unit)
PHP9,828.86(exc. VAT)
PHP9,828.86/unit
In Stock
RS PRO 140V ac, 300 V ac Input Uninterruptible power supply, 800 VA, GS800 480 W Stand Alone
  • RS Stock No. 235-5108
Subtotal (1 unit)
PHP6,770.26(exc. VAT)
PHP6,770.26/unit
In Stock
ABB CPT Switched Mode DIN Rail Power Supply 820 V dc, 575V ac AC/DC Input 24V dc, 5 A Output DC 120 W
  • RS Stock No. 772-4829
  • Mfr. Part No. 1SVR427054R0000 CP-T 24/5.0
Subtotal (1 unit)
PHP20,987.48(exc. VAT)
PHP20,987.48/unit
In Stock
RS PRO 2 Output 630 VA Chassis Mount Transformer, 2 x 115 V ac, IEC 61558-2-4
  • RS Stock No. 123-2503
Subtotal (1 unit)
PHP17,057.99(exc. VAT)
PHP17,057.99/unit
In Stock
TRACOPOWER Cover Kit for use with TXH 120, TXH 120 Series
  • RS Stock No. 745-1143
  • Mfr. Part No. TXH 120-COV
Subtotal (1 unit)
PHP434.95(exc. VAT)
PHP434.95/unit
In Stock
COTEK, AEK-3000-12 Switching Power Supply 12V, 2.4 kW 370V
  • RS Stock No. 818-7382
  • Mfr. Part No. AEK-3000-12
Subtotal (1 unit)
PHP108,142.89(exc. VAT)
PHP108,142.89/unit
In Stock
RS PRO 250 VA DIN Rail Transformer, 230 V ac, 400 V ac Primary, 2 x 115 V ac Secondary, ASNZS 61558..4, ASNZS 61558.1,
  • RS Stock No. 123-4145
Subtotal (1 unit)
PHP12,339.13(exc. VAT)
PHP12,339.13/unit
In Stock
MEAN WELL, RS-150-12 Switching Power Supply 12V dc, 150 W
  • RS Stock No. 621-0663
  • Mfr. Part No. RS-150-12
Subtotal (1 unit)
PHP1,862.92(exc. VAT)
PHP1,862.92/unit
In Stock
Weidmüller PRO BAS Power Supply DIN Rail Power Supply 264V ac AC/DC Input 24V dc, 2.5 A Output DC 60 W
  • RS Stock No. 287-5312
  • Mfr. Part No. 2838410000
Subtotal (1 unit)
PHP4,822.72(exc. VAT)
PHP4,822.72/unit
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