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

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26431 Products showing for Power Supplies & Transformers

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RS PRO Switched Mode DIN Rail Power Supply, 230V ac, 24V dc dc Output, 10A Output, 240W

RS Stock No. 136-8321

Each

PHP5,957.75

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RS PRO Pure Sine Wave 600W Power Inverter, 48V Input, 230V Output

RS Stock No. 179-3329

Each

PHP13,598.45

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RS PRO Pure Sine Wave 1500W Fixed Installation DC-AC Power Inverter, 12V dc Input, 230V ac Output, No

RS Stock No. 268-5131

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PHP40,000.10

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RS PRO DC AC Inverter, 48V dc Input, 230V ac Output, Railway Approved

RS Stock No. 144-7707

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PHP90,689.71

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RS PRO Pure Sine Wave 600W Power Inverter, 24V Input, 230V Output

RS Stock No. 179-3328

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PHP12,414.12

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RS PRO Pure Sine Wave 1000W Power Inverter, 48V Input, 230V Output

RS Stock No. 179-3332

Each

PHP22,368.51

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MEAN WELL Switching Power Supply, LRS-50-12, 12V dc, 4.2A, 50W, 1 Output, 120 → 373 V dc, 85 → 264 V ac

RS Stock No. 106-5830
Mfr. Part No. LRS-50-12

Each

PHP779.62

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RS PRO Switched Mode DIN Rail Power Supply, 230V ac, 24V dc dc Output, 1.3A Output, 30W

RS Stock No. 136-8308

Each

PHP1,853.46

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RS PRO Pure Sine Wave 1500W Power Inverter, 24V Input, 230V Output

RS Stock No. 179-3334

Each

PHP24,500.46

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MEAN WELL Switching Power Supply, RSP-2000-24, 24V dc, 80A, 1.9kW, 1 Output, 127 → 370 V dc, 90 → 264 V

RS Stock No. 764-6947
Mfr. Part No. RSP-2000-24

Each

PHP29,053.51

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RS PRO Modified Sine Wave 3500W Power Inverter, 12V dc Input, 230V ac Output

RS Stock No. 816-0071

Each

PHP37,743.50

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RS PRO Pure Sine Wave 400W Fixed Installation DC-AC Power Inverter, 24V dc Input, 230V ac Output, No

RS Stock No. 268-5145

Each

PHP11,003.57

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RS PRO Modified Sine Wave 2000W Power Inverter, 12V dc Input, 230V Output

RS Stock No. 179-3324

Each

PHP11,538.16

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RS PRO Switching Power Supply, 24V dc, 10A, 240W, 1 Output, 85 → 264V ac Input Voltage

RS Stock No. 161-8226

Each

PHP7,056.15

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SIP 1000W Generator, 230V Output, 14kg

RS Stock No. 276-8340
Mfr. Part No. 25400

Each

PHP29,125.86

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RS PRO Pure Sine Wave 1500W Power Inverter, 12V Input, 230V Output

RS Stock No. 179-3333

Each

PHP17,905.02

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RS PRO Pure Sine Wave 1000W Fixed Installation DC-AC Power Inverter, 12V dc Input, 230V ac Output, No

RS Stock No. 268-5129

Each

PHP20,136.65

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RS PRO Switched Mode DIN Rail Power Supply, 230V ac, 12V dc dc Output, 1.2A Output, 15W

RS Stock No. 136-8301

Each

PHP1,053.01

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RS PRO Switched Mode DIN Rail Power Supply, 230V ac, 24V dc dc Output, 5A Output, 120W

RS Stock No. 136-8319

Each

PHP4,246.11

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RS PRO Pure Sine Wave 2000W Fixed Installation DC-AC Power Inverter, 12V dc Input, 230V ac Output, No

RS Stock No. 268-5133

Each

PHP39,101.54

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