PC Power Supplies

PC power supplies, also known as computer power supplies, are pieces of hardware which convert high-power mains electricity into usable DC power, for the components within your desktop computer. They convert AC (alternating current) from the mains to low-voltage, regulated DC (direct current).


Why use a PC power supply?


Power supply units (PSUs) are an essential piece of hardware within a computer as they supply power to all the components within your PC, such as the motherboard or graphics card. Typical PSU voltages are 3.3V, 5V and 12V.


PSUs are there to prevent spikes in the voltage supply and for surge protection.


Where are they installed?


You will find these power supplies in the back of a desktop computer. It is an internal hardware component.


Computer power supplies feature a power cable connector on one side and multiple wires on the other. These wires connect to various devices within the computer to supply power to them, for example, motherboards and hard drives. Computer power supplies also have a cooling fan which expels air out the back of a computer. They also prevent overheating through voltage control. There is usually a power switch at the back and another switch to alter the voltage.


How important is overall wattage?


It is important that you computer PSU covers the necessary wattage that your system requires. You can work this out by roughly adding up the consumption of all your parts. It is best to have an oversized PSU as it will cover your current wattage requirements, with room for extra if you decide to upgrade any of your components.


What is an ATX PSU?


ATX is a specification for motherboards which many PC power supplies meet. This means that the computer PSU fits into an ATX standard case and works alongside an ATX motherboard within the PC. An ATX power supply would be suitable for use in a modular computer as it has a standard case size.


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Description Price Input Voltage Output Voltage Power Rating Output Current Number of Outputs Length Width Depth Mounting Type Efficiency Load Regulation Line Regulation Input Frequency Range Maximum Input Current
RS Stock No. 666-7012
Mfr. Part No.SS-400H1U APFC F0 80+
BrandSeasonic
HK$1,148.95
Each
units
90 → 264V ac ±12 V dc, 3.3 V dc, 5 V dc 400W 3 A, 20 A, 21 A, 29 A, 800 mA 5 235mm 100mm 40mm Rack Mount 80% ±5% ±1% - -
RS Stock No. 781-7186
Mfr. Part No.1RT45GFS01B10W
BrandSeasonic
HK$1,002.83
Each
units
220V -12 V, 3.3 V, 5 V, 12 V 450W 2.5 A, 20 A, 47 A, 300 mA 5 150mm 140mm 86mm Panel Mount 90% ±5% ±1% - -
RS Stock No. 708-2144
Mfr. Part No.SS-600ES APFC F3
BrandSeasonic
HK$954.21
Each
units
220V ac ±12 V dc, 3.3 V dc, 5 V dc 600W 2.5 A, 24 A, 46 A, 800 mA 5 150mm 140mm 86mm Panel Mount 82% ±5% ±1% - -
RS Stock No. 754-2413
Mfr. Part No.SS-500L1U Active PFC
BrandSeasonic
HK$1,319.26
Each
units
100 → 240V ac -12 V, 3.3 V, 5 V, 5 Vsb, 12 (Combined) V 500W 2.5 A, 20 A, 40 A, 300 mA 1 235mm 100mm 40mm Rack Mount >87% ±5% ±1% - -
RS Stock No. 177-810
Mfr. Part No.SS-300ES APFC F3
BrandSeasonic
HK$502.91
Each
units
220V ac ±12 V dc, 3.3 V dc, 5 V dc 300W 2.5 A, 17 A, 18 A, 20 A, 800 mA 6 150mm 140mm 86mm Panel Mount 80% ±5% ±1% - -
RS Stock No. 666-7025
Mfr. Part No.SS-400H2U APFC F0 80+
BrandSeasonic
HK$1,031.43
Each
units
90 → 264V ac ±12 V dc, 3.3 V dc, 5 V dc 400W 3 A, 20 A, 21 A, 29 A, 800 mA 5 225mm 100mm 70mm Rack Mount 80% ±5% ±1% - -
RS Stock No. 177-781
Mfr. Part No.SS-400ET APFC F3
BrandSeasonic
HK$698.74
Each
units
220V ac ±12 V dc, 3.3 V dc, 5 V dc 400W 2.5 A, 17 A, 20 A, 800 mA 6 150mm 140mm 86mm Panel Mount 80% ±5% ±1% - -
New
RS Stock No. 203-5326
Mfr. Part No.PCSE-370P-X2S2
BrandNipron
HK$1,244.21
Each
units
90 → 132V dc -12 V dc, 3.3 V dc, 5 V dc, 12 V dc 280.5W 1 A, 5 A, 17 A, 18 A, 21 A, 500 mA 5 - - - - - - - - -
RS Stock No. 136-9011
Mfr. Part No.SSPSUPRIME1200WGD
BrandSeasonic
HK$3,372.89
Each
units
100 → 240V ac -12 V dc, 3.3 V dc, 5 V dc, 5 VSB V dc, 12 V dc 1200W 3 A, 25 A, 100 A, 300 mA 5 170mm 86mm 150mm Panel Mount 87% 0.5% - 50 → 60Hz 15A
RS Stock No. 781-7192
Mfr. Part No.1RT75GFS01B10W
BrandSeasonic
HK$1,538.04
Each
units
220V -12 V, 3.3 V, 5 V, 12 V 750W 2.5 A, 20 A, 62 A, 300 mA 5 150mm 140mm 86mm Panel Mount 90% ±5% ±1% - -
RS Stock No. 136-9000
Mfr. Part No.SSPSUPRIME650W
BrandSeasonic
HK$2,543.80
Each
units
100 → 240V ac -12 V dc, 3.3 V dc, 5 V dc, 5 VSB V dc, 12 V dc 650W 3 A, 20 A, 54 A, 300 mA 5 170mm 86mm 150mm Panel Mount 94% 0.5% - 50 → 60Hz 8.5A
New
RS Stock No. 203-5327
Mfr. Part No.PCSE-370P-X2S
BrandNipron
HK$1,199.24
Each
units
90 → 132V dc -12 V dc, 3.3 V dc, 5 V dc, 12 V dc 280.5W 1 A, 5 A, 17 A, 18 A, 21 A, 500 mA 5 - - - - - - - - -
RS Stock No. 136-6055
Mfr. Part No.SSP-300SFB
BrandSeasonic
HK$361.96
Each
units
100 → 240V dc -12 V dc, 3.3 V dc, 5 V dc, 12 V dc 300W 2 A, 14 A, 17 A, 18 A, 20 A, 800 mA 6 100mm 125mm 63.5mm - - ±5% ±1% 47 → 63Hz -
RS Stock No. 781-7177
Mfr. Part No.1GT35GF1DBA10W
BrandSeasonic
HK$795.77
Each
units
220V -12 V, 3.3 V, 5 V, 12 V 350W 2 A, 12 A, 16 A, 29 A, 300 mA 5 150mm 140mm 86mm Panel Mount 90% ±5% ±1% - -
RS Stock No. 704-3281
Mfr. Part No.GSM20-PSU
HK$253.79
Each
units
250V ac 12 V 12W - 1 88mm 60mm 26mm Stand Alone - - - 50/60Hz -
RS Stock No. 121-7780
BrandRS PRO
HK$837.93
Each
units
200 → 240V ac ±12 V dc, 3.3 V dc, 5 V dc 850W 0.3 → 65A 1 - - - DIN Rail >82% - - - -
New
RS Stock No. 203-5325
Mfr. Part No.ePCSA-500P-X2C
BrandNipron
HK$1,746.39
Each
units
85 → 264V dc -12 V dc, 3.3 V dc, 5 V dc, 12 V dc 350W 2 A, 2.5 A, 20 A, 22 A, 500 mA 5 - - - - - - - - -
RS Stock No. 666-7000
Mfr. Part No.SS-650HT APFC F3
BrandSeasonic
HK$1,256.52
Each
units
220V ac ±12 V dc, 3.3 V dc, 5 V dc 650W 3 A, 18 A, 24 A, 30 A, 800 mA 8 150mm 140mm 86mm Panel Mount 80% ±5% ±1% - -
RS Stock No. 175-3505
BrandRS PRO
HK$472.63
Each
units
230V dc 12 V dc 400W 30A - 85mm 150mm 140mm Desktop - - - - -
New
RS Stock No. 201-1837
BrandRS PRO
HK$720.72
Each
units
200 → 240V dc -12 V, 3.3 V, 5 V, 5 VSB, 12 V 500W 0.3A, 2.0A, 15A, 16A, 29A 5 - - - - - - - - -
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