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. 771-9379
BrandRS PRO
SGD13.21
Each
units
5V dc - 500mA 3W 100 400 V dc, 85 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 819-3970
BrandRS PRO
SGD155.80
Each
units
24V dc - 6.5A 156W 88 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 751-1406
BrandRS PRO
SGD53.00
Each
units
5V dc - 3.6A 18W 120 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm - - 50g
RS Stock No. 828-0162
BrandRS PRO
SGD101.60
Each
units
12V dc - 4A 60W 100 240V ac 4 Wall Mount Enclosed 187.2mm 122.2mm 89.9mm - - <800g
RS Stock No. 828-0134
BrandRS PRO
SGD64.27
Each
units
12V dc - 2A 24W 100 240V ac 1 Cable Enclosed 140mm 80mm 85mm - - >1kg
RS Stock No. 786-4738
BrandRS PRO
SGD18.47
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. 667-5789
BrandRS PRO
SGD23.65
Each
units
5V dc - 1A 5W 110 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm - - 35g
RS Stock No. 771-9401
BrandRS PRO
SGD17.85
Each
units
5V dc - 400mA 2W 120 430 V dc, 85 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 751-1431
BrandRS PRO
SGD77.56
Each
units
24V dc - 1.7A 40.8W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 771-8543
BrandRS PRO
SGD100.71
Each
units
15V dc - 7A 105W 88 264V ac 1 Chassis Mount Enclosed 158mm 97mm 38mm - - 520g
RS Stock No. 771-9414
BrandRS PRO
SGD17.54
Each
units
12V dc - 167mA 2W 120 430 V dc, 85 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 667-5786
BrandRS PRO
SGD23.61
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. 711-2636
BrandRS PRO
SGD82.12
Each
units
24V dc - 2.5A 60W 88 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 667-5776
BrandRS PRO
SGD19.44
Each
units
24V dc - 125mA 3W 110 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 161-8285
BrandRS PRO
SGD25.52
Each
units
12V dc - 6A 72W 100 240V ac 1 Chassis Mount Enclosed 97mm 99mm 30mm - - 300g
RS Stock No. 181-2196
BrandRS PRO
SGD9.97
Each
units
15V dc - 200mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 786-4725
BrandRS PRO
SGD18.47
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. 161-8275
BrandRS PRO
SGD19.76
Each
units
24V dc - 1.5A 36W - 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 181-2125
BrandRS PRO
SGD18.83
Each
units
12V dc - 1.66A 20W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 161-8276
BrandRS PRO
SGD19.76
Each
units
36V dc - 1A 36W - 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
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