Embedded Switch Mode Power Supplies (SMPS)

A switch mode power supply is a type of electronic circuit used to convert power. They are also known as switching-mode power supplies or SMPS for short. The typical topology of an SMPS is AC to DC conversion, although users may find other switches that feature an output of DC to DC voltage.

How do SMPS work?

For the power supply to transform its input voltage into an output voltage, the switch will turn on and off with high frequency. The inductors or capacitors within the device will then regulate the power to the device. This continuous switching of the capacitor maintains the voltage at the desired level and provides excellent efficiency.

How do SMPS convert AC to DC?

In the case of AC mains usage, the input voltage will be filtered the same way with a capacitor or inductor to regulate the power and give you the DC output.

Which SMPS is best for a desktop PC?

The power supply unit you use in your PC is important as it ultimately determines what other components you can use within it and the output in performance you get at the end. For high-end gaming PC builds you should aim for an efficiency rating of >80%. The higher the rating, the less electricity it consumes. The less electricity used means easier heat dissipation which keeps the PC cool and performing optimally.

Switching power supply units with higher efficiency and lower levels of heat dissipation are typically compact in nature, making them ideal for projects with limited space.

Where are SMPS used?

  • PC/Laptops
  • Mobile phone chargers
  • Security systems such as CCTV Cameras
  • Machine tool industries

...
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Description Price Output Voltage Series Output Current Power Rating Input Voltage Number of Outputs Mounting Type Package Type Length Width Depth Ripple And Noise Load Regulation Weight
RS Stock No. 161-8283
BrandRS PRO
$23.07
Each
units
48V dc - 1.1A 52.8W 100 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 916-3936
BrandRS PRO
$88.49
Each
units
12V dc - 10A 120W 100 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 751-1428
BrandRS PRO
$73.98
Each
units
15V dc - 2A 30W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 144-6266
BrandRS PRO
$63.78
Each
units
12V dc - 1.25A 15W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 31mm - - 135g
RS Stock No. 181-2136
BrandRS PRO
$115.77
1 Tube of 13
Tube(s)
12V dc - 250mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 124-4712
BrandRS PRO
$51.11
Each
units
27.6V dc - 2.16A 60W 100 230V ac 2 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 181-2194
BrandRS PRO
$10.52
Each
units
12V dc - 250mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 667-5764
BrandRS PRO
$20.74
Each
units
9V dc - 330mA 3W 110 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 711-2620
BrandRS PRO
$87.62
Each
units
5V dc - 9A 45W 88 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 181-2197
BrandRS PRO
$12.10
Each
units
24V dc - 250mA 6W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 161-8228
BrandRS PRO
$137.37
Each
units
12V dc - 25A 300W 120 370 V dc, 90 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 771-9366
BrandRS PRO
$11.70
Each
units
12V dc - 83.3mA 1W 100 400 V dc, 85 264 V ac 1 PCB Mount Miniature 35mm 24mm 11mm - - -
RS Stock No. 161-8263
BrandRS PRO
$117.74
Each
units
12V dc - 16.6A 199W 127 370 V dc, 90 264 V ac 1 Chassis Mount Open Frame 128mm 76.5mm 37.1mm - - -
RS Stock No. 144-6288
BrandRS PRO
$50.04
Each
units
12V dc - 2.1A 25W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 181-2189
BrandRS PRO
$12.10
Each
units
3V dc - 1.25A 4.1W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 161-8218
BrandRS PRO
$115.17
Each
units
5V dc - 40A 200W 120 370 V dc, 85 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8301
BrandRS PRO
$39.56
Each
units
48V dc - 3.3A 158W 170 264 V ac, 85 132 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 480g
RS Stock No. 161-8296
BrandRS PRO
$32.09
Each
units
48V dc - 2.3A 110W 85 264V ac 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS Stock No. 916-3927
BrandRS PRO
$76.38
Each
units
12V dc - 5A 60W 100 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 161-8244
BrandRS PRO
$364.94
Each
units
27V dc - 23A 799W 90 264V ac 1 Chassis Mount Enclosed 226mm 116.5mm 41mm - - -
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