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. 181-2126
BrandRS PRO
MYR54.90
Each
units
24V dc - 833mA 20W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 828-0181
BrandRS PRO
MYR380.21
Each
units
13.8V dc - 1.5A 20W 195 253V ac 1 Wall Mount Enclosed 240mm 225mm 80mm - - 1kg
RS Stock No. 181-2122
BrandRS PRO
MYR47.48
Each
units
24V dc - 625mA 15W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 711-2595
BrandRS PRO
MYR169.34
Each
units
5V dc - 4A 20W 88 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS Stock No. 181-2199
BrandRS PRO
MYR32.14
Each
units
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. 161-8254
BrandRS PRO
MYR96.81
Each
units
24V dc - 2.5A 60W 127 370 V dc, 90 264 V ac 1 Chassis Mount Open Frame 101.6mm 51mm 30mm - - -
RS Stock No. 161-8227
BrandRS PRO
MYR335.77
Each
units
48V dc - 5A 240W 85 264V ac 1 Chassis Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 124-4714
BrandRS PRO
MYR179.21
Each
units
48V dc - 1.25A 60W 100 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 181-2137
BrandRS PRO
MYR332.48
1 Tube of 13
Tube(s)
15V dc - 200mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-2108
BrandRS PRO
MYR23.69
Each
units
3V dc - 600mA 1.98W 70 420 V dc, 85 305 V ac 1 PCB Mount Open Frame 35mm 11mm 18mm - - 6g
RS Stock No. 181-3266
BrandRS PRO
MYR176.95
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8267
BrandRS PRO
MYR334.41
Each
units
13.8V dc - 0 10A 140W 195 253V ac 2 Chassis Mount Enclosed 200mm 110mm 50mm - - 900g
RS Stock No. 181-2200
BrandRS PRO
MYR32.14
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. 181-2192
BrandRS PRO
MYR34.71
Each
units
5V dc - 1.2A 6W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 144-6266
BrandRS PRO
MYR173.75
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. 181-3265
BrandRS PRO
MYR176.95
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-2193
BrandRS PRO
MYR34.71
Each
units
12V dc - 500mA 6W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 181-2131
BrandRS PRO
MYR63.96
Each
units
48V dc - 500mA 25W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 161-8281
BrandRS PRO
MYR68.69
Each
units
24V dc - 2.2A 52.8W 100 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 181-2139
BrandRS PRO
MYR367.61
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
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