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 Number of Outputs Input Voltage Mounting Type Package Type Length Width Depth Weight Efficiency Maximum Temperature
RS Stock No. 161-8223
BrandRS PRO
SGD88.29
Each
units
48V dc - 4.2A 200W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Enclosed 199mm 99mm 50mm - 87.5% +70°C
RS Stock No. 711-2614
BrandRS PRO
SGD69.98
Each
units
12V dc - 3A 36W 1 88 → 264V ac Chassis Mount Enclosed 78mm 51mm 28mm 180g 86% +71°C
RS Stock No. 161-8241
BrandRS PRO
SGD265.07
Each
units
36V dc - 17.5A 630W 1 90 → 264V ac Chassis Mount Enclosed 218mm 116.5mm 41mm - 90% +70°C
RS Stock No. 161-8235
BrandRS PRO
SGD277.34
Each
units
48V dc - 11A 480W 1 90 → 264V ac Chassis Mount Enclosed 218mm 116.5mm 41mm 8.7kg - +70°C
RS Stock No. 181-3257
BrandRS PRO
SGD40.16
Each
units
- - - - - - - - - - - - - -
RS Stock No. 144-6285
BrandRS PRO
SGD30.58
Each
units
12V dc - 1.25A 15W 1 264 V ac, 370 V dc PCB Mount Encapsulated 70mm 48mm 23.5mm 85g - +70°C
RS Stock No. 181-2199
BrandRS PRO
SGD11.03
Each
units
3V dc - 1A 3.3W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 68% +70°C
RS Stock No. 181-3266
BrandRS PRO
SGD57.70
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8266
BrandRS PRO
SGD94.52
Each
units
48V dc - 4.16A 199.6W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Open Frame 128mm 76.5mm 37.1mm - 90% +70°C
RS Stock No. 711-2627
BrandRS PRO
SGD69.98
Each
units
24V dc - 1.5A 36W 1 88 → 264V ac Chassis Mount Enclosed 78mm 51mm 28mm 180g 87% +71°C
RS Stock No. 181-2127
BrandRS PRO
SGD21.92
Each
units
5V dc - 4.1A 20.5W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 70mm 48mm 23.5mm 120g 79% +70°C
RS Stock No. 181-2137
BrandRS PRO
SGD113.99
1 Tube of 13
Tube(s)
15V dc - 200mA 3W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 77% +70°C
RS Stock No. 161-8245
BrandRS PRO
SGD301.67
Each
units
48V dc - 14A 800W 1 90 → 264V ac Chassis Mount Enclosed 226mm 116.5mm 41mm - 89% +70°C
RS Stock No. 671-6717
BrandRS PRO
SGD30.46
Each
units
24V dc - 450mA 10W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 19mm 50g - +70°C
RS Stock No. 181-2123
BrandRS PRO
SGD18.83
Each
units
3V dc - 3.6A 11.8W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm 60g 74% +70°C
RS Stock No. 181-3263
BrandRS PRO
SGD50.20
Each
units
- - - - - - - - - - - - - -
RS Stock No. 711-2620
BrandRS PRO
SGD84.83
Each
units
5V dc - 9A 45W 1 88 → 264V ac Chassis Mount Enclosed 98mm 82mm 35mm 310g 82% +71°C
RS Stock No. 161-8239
BrandRS PRO
SGD265.07
Each
units
12V dc - 42A 600W 1 90 → 264V ac Chassis Mount Enclosed 218mm 116.5mm 41mm - 88% +70°C
RS Stock No. 181-2144
BrandRS PRO
SGD119.31
1 Tube of 13
Tube(s)
24V dc - 210mA 5W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 81% +70°C
RS Stock No. 124-4712
BrandRS PRO
SGD54.96
Each
units
27.6V dc - 2.16A 60W 2 100 → 230V ac Panel Mount Open Frame 101.6mm 50.8mm 29mm - - +50°C
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