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. 667-5786
BrandRS PRO
$27.96
Each
units
12V dc - 420mA 5W 110 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm - - 35g
RS Stock No. 819-3970
BrandRS PRO
$184.53
Each
units
24V dc - 6.5A 156W 88 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 711-2624
BrandRS PRO
$106.38
Each
units
12V dc - 5A 60W 88 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 786-4725
BrandRS PRO
$21.88
Each
units
3.3V dc - 1A 3.3W 100 400 V dc, 85 264 V ac 1 PCB Mount Ultra-Miniature 42mm 11mm 24mm - - -
RS Stock No. 671-6704
BrandRS PRO
$39.83
Each
units
12V dc - 900mA 10W 120 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 19mm - - 50g
RS Stock No. 771-9408
BrandRS PRO
$21.13
Each
units
3.3V dc - 600mA 2W 120 430 V dc, 85 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 181-2139
BrandRS PRO
$142.08
1 Tube of 13
Tube(s)
3V dc - 1A 3.3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-3233
BrandRS PRO
$551.90
1 Tube of 13
Tube(s)
3.3V dc - 300mA 1W 120 370 V dc, 90 264 V ac 1 Through Hole Encapsulated 35.7mm 19mm 25mm - - 27.5g
RS Stock No. 181-3234
BrandRS PRO
$551.90
1 Tube of 13
Tube(s)
5V dc - 200mA 1W 120 370 V dc, 90 264 V ac 1 Through Hole Encapsulated 35.7mm 19mm 25mm - - 27.5g
RS Stock No. 786-4738
BrandRS PRO
$21.88
Each
units
9V dc - 560mA 5W 100 400 V dc, 85 264 V ac 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 181-2140
BrandRS PRO
$142.08
1 Tube of 13
Tube(s)
5V dc - 1A 5W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-3235
BrandRS PRO
$577.66
1 Tube of 13
Tube(s)
3.3V dc - 900mA 3W 120 370 V dc, 90 264 V ac 1 Through Hole Encapsulated 35.7mm 19mm 25mm - - 27.5g
RS Stock No. 181-3264
BrandRS PRO
$68.33
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-3236
BrandRS PRO
$577.66
1 Tube of 13
Tube(s)
5V dc - 600mA 3W 120 370 V dc, 90 264 V ac 1 Through Hole Encapsulated 35.7mm 19mm 25mm - - 27.5g
RS Stock No. 181-2200
BrandRS PRO
$12.84
Each
units
5V dc - 1A 5W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-3265
BrandRS PRO
$68.33
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-2195
BrandRS PRO
$13.43
Each
units
15V dc - 400mA 6W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 161-8223
BrandRS PRO
$123.94
Each
units
48V dc - 4.2A 200W 120 370 V dc, 85 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8257
BrandRS PRO
$106.75
Each
units
12V dc - 10.5A 126W 90 264V ac 1 Chassis Mount Open Frame 127mm 76mm 30.5mm - - -
RS Stock No. 828-0181
BrandRS PRO
$146.82
Each
units
13.8V dc - 1.5A 20W 195 253V ac 1 Wall Mount Enclosed 240mm 225mm 80mm - - 1kg
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