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. 786-4725
BrandRS PRO
MYR56.87
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. 667-5767
BrandRS PRO
MYR61.24
Each
units
3.3V dc - 700mA 2.3W 110 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 786-4729
BrandRS PRO
MYR57.54
Each
units
5V dc - 1A 5W 100 400 V dc, 85 264 V ac 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 771-9376
BrandRS PRO
MYR42.77
Each
units
12V dc - 250mA 3W 100 400 V dc, 85 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 786-4731
BrandRS PRO
MYR57.72
Each
units
12V dc - 420mA 5W 100 400 V dc, 85 264 V ac 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 786-4744
BrandRS PRO
MYR57.54
Each
units
24V dc - 210mA 5W 100 400 V dc, 85 264 V ac 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 771-9379
BrandRS PRO
MYR40.52
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. 771-9366
BrandRS PRO
MYR33.62
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. 711-2611
BrandRS PRO
MYR214.62
Each
units
5V dc - 6A 30W 88 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 771-9408
BrandRS PRO
MYR54.74
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. 751-1415
BrandRS PRO
MYR212.65
Each
units
5V dc - 6A 30W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 771-9401
BrandRS PRO
MYR54.74
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. 771-9372
BrandRS PRO
MYR38.73
Each
units
9V dc - 333mA 3W 100 400 V dc, 85 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9385
BrandRS PRO
MYR39.69
Each
units
24V dc - 125mA 3W 100 400 V dc, 85 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9414
BrandRS PRO
MYR53.79
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. 161-8257
BrandRS PRO
MYR295.58
Each
units
12V dc - 10.5A 126W 90 264V ac 1 Chassis Mount Open Frame 127mm 76mm 30.5mm - - -
RS Stock No. 667-5776
BrandRS PRO
MYR61.43
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. 181-2186
BrandRS PRO
MYR29.05
Each
units
3V dc - 770mA 2.3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 144-6288
BrandRS PRO
MYR151.98
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. 181-2136
BrandRS PRO
MYR332.48
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
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