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    Power Supplies

    RS offers a wide selection of power supply units (PSUs) for use in various domestic and industrial applications. Our range of power supplies 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 buildingMaintenanceMarine & offshoreMilitary & defenceAutomotiveElectrical wiringDomesticFood and beverageManufacturing

    AC/DC Adapters
    AC/DC Adapters
    DIN Rail Power Supplies
    DIN Rail Power Supplies
    Desktop Power Supplies
    Desktop 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

    7876 Products showing for Power Supplies

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    PULS DIMENSION Q Switched Mode DIN Rail Power Supply, 100 → 240V ac ac Input, 12V dc dc Output, 15A Output, 180W
    • RS Stock No. 514-5568
    • Mfr. Part No. QS10.121
    Each
    MYR2,237.45
    MEAN WELL Switching Power Supply, CSP-3000-120, 120V dc, 25A, 3kW, 1 Output, 180 → 264 V ac, 254 → 370 V
    • RS Stock No. 186-0191
    • Mfr. Part No. CSP-3000-120
    Each
    MYR2,277.25
    Carlo Gavazzi SP Switched Mode DIN Rail Power Supply, 240V ac ac Input, 24V dc dc Output, 5A Output
    • RS Stock No. 222-2914
    • Mfr. Part No. SPDM241201
    Each
    MYR689.17
    Omron S8VS Switched Mode DIN Rail Power Supply, 85 → 264V ac ac Input, 24V dc dc Output, 5A Output, 120W
    • RS Stock No. 452-8631
    • Mfr. Part No. S8VS-12024
    Each
    MYR1,083.31
    Eaton 175 → 275V Input Stand Alone Uninterruptible Power Supply, 1500VA (900W), 5S
    • RS Stock No. 250-0319
    • Mfr. Part No. 5S1500I Eaton 5S 1500i
    Each
    MYR2,569.88
    Siemens 24V dc Input DIN Rail Mount Uninterruptible Power Supply (480W)
    • RS Stock No. 880-1384
    • Mfr. Part No. 6EP4136-3AB00-1AY0
    Each
    MYR2,490.17
    PULS DIMENSION C-Line Switched Mode DIN Rail Power Supply, 100→120V ac ac Input, 24V dc dc Output, 5A Output,
    • RS Stock No. 627-6174
    • Mfr. Part No. CS5.241
    Each
    MYR1,050.72
    MEAN WELL SDR Switched Mode DIN Rail Power Supply, 180 → 264V ac ac Input, 24V dc dc Output, 40A Output, 960W
    • RS Stock No. 122-2226
    • Mfr. Part No. SDR-960-24
    Each
    MYR3,143.53
    Eaton 175 → 275V Input Stand Alone Uninterruptible Power Supply, 1500VA (900W), 5S
    • RS Stock No. 250-0320
    • Mfr. Part No. 5S1500iBS
    Each
    MYR2,583.56
    Eaton 184 → 276V Input Rack Mount Uninterruptible Power Supply, 1500VA (1.05kW), 5SC
    • RS Stock No. 287-7959
    • Mfr. Part No. 5SC1500IRBS
    Each
    MYR6,004.53
    PULS DIMENSION Q Switched Mode DIN Rail Power Supply, 380 → 480V ac ac Input, 24V dc dc Output, 40A Output, 960W
    • RS Stock No. 711-5985
    • Mfr. Part No. QT40.241
    Each
    MYR3,668.59
    Nipron 350W PC Power Supply, 85 → 264V ac Input, 3.3 V dc, 5 V dc, 12 V dc, -12 V dc Output
    • RS Stock No. 203-5325
    • Mfr. Part No. ePCSA-500P-X2C
    Each
    MYR1,995.31
    Phoenix Contact QUINT POWER Switched Mode DIN Rail Power Supply, 100 → 240 V ac / 110 → 250V dc ac Input,
    • RS Stock No. 123-4307
    • Mfr. Part No. 2904602
    Each
    MYR1,644.57
    Phoenix Contact 24V dc Input DIN Rail Uninterruptible Power Supply (960W), QUINT-UPS
    • RS Stock No. 739-7878
    • Mfr. Part No. 2320241
    Each
    MYR3,162.81
    MEAN WELL Switching Power Supply, RSP-3000-24, 24V dc, 125A, 3kW, 1 Output, 180 → 264 V ac, 254 → 370 V
    • RS Stock No. 674-1665
    • Mfr. Part No. RSP-3000-24
    Each
    MYR3,539.58
    Murrelektronik Limited EMPARRO Switched Mode DIN Rail Power Supply, 230V ac, 24V dc dc Output, 20A Output, 480W
    • RS Stock No. 123-6697
    • Mfr. Part No. 85442
    Each
    MYR2,528.19
    Riello Power Supply Accessory, for use with SDH 1000, BTC SDH Series
    • RS Stock No. 287-5396
    • Mfr. Part No. BTC SDH 36V BB M1
    Each
    MYR3,478.47
    TDK-Lambda Switching Power Supply, V4FFS 5V60A,12V12A,12V12A,24V6, 5 V dc, 12 V dc, 24 V dc, 6 A, 12 A, 60 A, 450W,
    • RS Stock No. 408-4349
    • Mfr. Part No. V4FFS 5V60A,12V12A,12V12A,24V6
    Each
    MYR4,232.58
    Omron S8VK-X Switched Mode DIN Rail Power Supply, 100 → 240V ac ac Input, 24V dc dc Output, 10A Output, 240W
    • RS Stock No. 174-5837
    • Mfr. Part No. S8VK-X24024A-EIP
    Each
    MYR2,387.82
    PULS DIMENSION Q Switched Mode DIN Rail Power Supply, 100 → 240V ac ac Input, 24V dc dc Output, 5A Output, 120W
    • RS Stock No. 711-5966
    • Mfr. Part No. QS5.241-A1
    Each
    MYR2,478.10
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