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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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    MEAN WELL Switching Power Supply, IRM-45-24ST, 24V dc, 1.9A, 45.6W, 1 Output, 85 → 264V ac Input Voltage
    • RS Stock No. 135-8965
    • Mfr. Part No. IRM-45-24ST
    Each
    MYR100.02
    MEAN WELL SDR Switched Mode DIN Rail Power Supply, 88 → 264V ac ac Input, 24V dc dc Output, 20A Output, 480W
    • RS Stock No. 765-4676
    • Mfr. Part No. SDR-480P-24
    Each
    MYR831.55
    MEAN WELL EDR Switched Mode DIN Rail Power Supply, 90 → 264V ac ac Input, 12V dc dc Output, 10A Output, 120W
    • RS Stock No. 122-2207
    • Mfr. Part No. EDR-120-12
    Each
    MYR134.57
    MEAN WELL Switching Power Supply, RD-35A, 5 V dc, 12 V dc, 1A, 32W, Dual Output, 125 → 373 V dc, 88 → 264
    • RS Stock No. 644-7073
    • Mfr. Part No. RD-35A
    Each
    MYR79.55
    MEAN WELL Switching Power Supply, IRM-60-12, 12V dc, 5A, 60W, 1 Output, 85 → 264V ac Input Voltage
    • RS Stock No. 135-8968
    • Mfr. Part No. IRM-60-12
    Each
    MYR76.15
    TRACOPOWER Switching Power Supply, TML 40254C, 5 V dc, 24 V dc, 5 A, 625 mA, 40W, Dual Output, 100 → 375 V dc,
    • RS Stock No. 706-6192
    • Mfr. Part No. TML 40254C
    Each
    MYR446.28
    MEAN WELL Switching Power Supply, RD-85A, 5 V dc, 12 V dc, 4A, 88W, Dual Output, 125 → 373 V dc, 88 → 264
    • RS Stock No. 644-7118
    • Mfr. Part No. RD-85A
    Each
    MYR130.93
    MEAN WELL Switching Power Supply, RS-50-48, 48V dc, 1.1A, 52.8W, 1 Output, 125 → 373 V dc, 88 → 264 V ac
    • RS Stock No. 678-3764
    • Mfr. Part No. RS-50-48
    Each
    MYR74.91
    MEAN WELL Switching Power Supply, RT-85C, 5 V dc, ±15 V dc, 3 A, 7 A, 500 mA, 87.5W, Triple Output, 125 → 373 V
    • RS Stock No. 413-601
    • Mfr. Part No. RT-85C
    Each
    MYR133.84
    Siemens Power Supply Redundancy Module, SITOP Series
    • RS Stock No. 201-0700
    • Mfr. Part No. 6EP4346-7RB00-0AX0
    Each
    MYR674.35
    Omron Bracket Kit, for use with S8FS Series Switch Mode Power Supply, S8JC Series Power Supply, S82Y Series
    • RS Stock No. 125-4054
    • Mfr. Part No. S82Y-FSC015DIN
    Each
    MYR34.31
    Carlo Gavazzi Switching Power Supply, SPMA24151, 24V dc, 630mA, 15W, 1 Output, 240V ac Input Voltage
    • RS Stock No. 222-2931
    • Mfr. Part No. SPMA24151
    Each
    MYR284.20
    MEAN WELL Switching Power Supply, IRM-30-5ST, 5V dc, 6A, 30W, 1 Output, 85 → 264V ac Input Voltage
    • RS Stock No. 135-8950
    • Mfr. Part No. IRM-30-5ST
    Each
    MYR72.40
    Trendnet Single Port POE Injector, 30W
    • RS Stock No. 300-191
    • Mfr. Part No. TPE-215GI
    Each
    MYR250.71
    MEAN WELL Switching Power Supply, LRS-100-24, 24V dc, 4.5A, 108W, 1 Output, 120 → 373 V dc, 85 → 264 V ac
    • RS Stock No. 106-5846
    • Mfr. Part No. LRS-100-24
    Each
    MYR78.07
    MEAN WELL 20W Plug-In AC/DC Adapter 9V dc Output, 2.22A Output
    • RS Stock No. 706-6509
    • Mfr. Part No. GE24I09-P1J
    Each
    MYR87.01
    Mascot 12W Plug-In AC/DC Adapter 12V dc Output, 1A Output
    • RS Stock No. 400-6670
    • Mfr. Part No. 9881000045
    Each
    MYR98.50
    MEAN WELL Switching Power Supply, SPV-300-12RS, 12V dc, 25A, 300W, 1 Output, 124 → 370 V dc, 88 → 264 V
    • RS Stock No. 705-9857
    • Mfr. Part No. SPV-300-12RS
    Each
    MYR407.75
    MEAN WELL Switching Power Supply, EPS-120-12, 12V dc, 10A, 84W, 1 Output, 113 → 370 V dc, 80 → 264 V ac
    • RS Stock No. 103-4708
    • Mfr. Part No. EPS-120-12
    Each
    MYR104.65
    Eaton UPS Power Distribution Unit, for use with UPS, FlexPDU Series
    • RS Stock No. 250-0359
    • Mfr. Part No. EFLX12I
    Each
    MYR1,270.38
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