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. 181-2140
BrandRS PRO
MYR367.61
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. 828-0190
BrandRS PRO
MYR380.21
Each
units
27.6V dc - 1.5A 42W 195 253V ac 1 Wall Mount Enclosed 310mm 240mm 80mm - - 1kg
RS Stock No. 144-6284
BrandRS PRO
MYR119.56
Each
units
5V dc - 2.8A 14W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 85g
RS Stock No. 181-2142
BrandRS PRO
MYR367.61
1 Tube of 13
Tube(s)
9V dc - 560mA 5W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 828-0197
BrandRS PRO
MYR605.65
Each
units
13.8V dc - 10A 140W 195 253V ac 1 Wall Mount Enclosed 240mm 225mm 80mm - - 1kg
RS Stock No. 181-3235
BrandRS PRO
MYR1,494.65
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. 161-8271
BrandRS PRO
MYR267.40
Each
units
48V dc - 4.2A 200W 90 264V ac 1 Chassis Enclosed 200mm 99mm 38mm - - -
RS Stock No. 819-3961
BrandRS PRO
MYR477.84
Each
units
15V dc - 10.4A 156W 88 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 144-6289
BrandRS PRO
MYR152.03
Each
units
24V dc - 1.1A 25W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 751-1419
BrandRS PRO
MYR212.65
Each
units
12V dc - 2.5A 30W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 181-2127
BrandRS PRO
MYR63.96
Each
units
5V dc - 4.1A 20.5W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 161-8300
BrandRS PRO
MYR114.89
Each
units
36V dc - 4.3A 155W 170 264 V ac, 85 132 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 480g
RS Stock No. 711-2608
BrandRS PRO
MYR162.60
Each
units
15V dc - 1.4A 21W 88 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS Stock No. 161-8266
BrandRS PRO
MYR358.41
Each
units
48V dc - 4.16A 199.6W 127 370 V dc, 90 264 V ac 1 Chassis Mount Open Frame 128mm 76.5mm 37.1mm - - -
RS Stock No. 161-8215
BrandRS PRO
MYR62.76
Each
units
12V dc - 2.1A 25.2W 88 264V ac 1 Chassis Mount Enclosed 850mm 58.5mm 36.5mm - - 250g
RS Stock No. 161-8280
BrandRS PRO
MYR68.26
Each
units
15V dc - - 51W 100 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 181-3258
BrandRS PRO
MYR140.86
Each
units
- - - - - - - - - - - - - -
RS Stock No. 751-1421
BrandRS PRO
MYR207.35
Each
units
24V dc - 1.25A 30W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 161-8230
BrandRS PRO
MYR422.10
Each
units
48V dc - 6.7A 300W 120 370 V dc, 90 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8265
BrandRS PRO
MYR358.41
Each
units
24V dc - 8.1A 201.6W 127 370 V dc, 90 264 V ac 1 Chassis Mount Open Frame 128mm 76.5mm 37.1mm - - -
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