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. 181-2199
BrandRS PRO
£4.88
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. 181-3252
BrandRS PRO
£19.26
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 181-2187
BrandRS PRO
£4.88
Each
Units
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. 161-8233
BrandRS PRO
£127.02
Each
Units
27V dc - 18A 480W 1 90 → 264V ac Chassis Mount Enclosed 218mm 116.5mm 41mm 8.7kg - +70°C
RS Stock No. 181-3268
BrandRS PRO
£32.51
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 181-2132
BrandRS PRO
£56.34
1 Tube of 13
Tube(s)
3V dc - 770mA 2.3W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 66% +70°C
RS Stock No. 181-3265
BrandRS PRO
£32.51
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 181-2143
BrandRS PRO
£62.32
1 Tube of 13
Tube(s)
12V dc - 420mA 5W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 79% +70°C
RS Stock No. 144-6287
BrandRS PRO
£20.26
Each
Units
5V dc - 4.1A 20.5W 1 264 V ac, 370 V dc PCB Mount Encapsulated 70mm 48mm 23.5mm 120g - +70°C
RS Stock No. 181-2127
BrandRS PRO
£9.51
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. 144-6282
BrandRS PRO
£11.91
Each
Units
12V dc - 430mA 5W 1 264 V ac, 370 V dc PCB Mount Encapsulated 53.8mm 28.8mm 19mm 43g - +70°C
RS Stock No. 161-8285
BrandRS PRO
£12.78
Each
Units
12V dc - 6A 72W 1 100 → 240V ac Chassis Mount Enclosed 97mm 99mm 30mm 300g 88% +50°C
RS Stock No. 161-8291
BrandRS PRO
£13.98
Each
Units
12V dc - 8.5A 102W 1 85 → 264V ac Chassis Mount Enclosed 129mm 97mm 30mm 340g 88% +70°C
RS Stock No. 161-8213
BrandRS PRO
£9.69
Each
Units
5V dc - 5A 25W 1 88 → 264V ac Chassis Mount Enclosed 85mm 58.5mm 36.5mm 250g 77.5% +60°C
RS Stock No. 181-3258
BrandRS PRO
£22.76
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 181-2121
BrandRS PRO
£6.99
Each
Units
12V dc - 1.25A 15W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm 60g 80% +70°C
RS Stock No. 161-8273
BrandRS PRO
£10.16
Each
Units
12V dc - 3A 36W 1 - Chassis Mount Enclosed 99mm 82mm 30mm 230g 86% -
RS Stock No. 161-8297
BrandRS PRO
£16.99
Each
Units
12V dc - 12.5A 150W 1 170 → 264 V ac, 85 → 132 V ac Chassis Mount Enclosed 99mm 82mm 30mm 480g 88% +70°C
RS Stock No. 181-2108
BrandRS PRO
£3.07
Each
Units
3V dc - 600mA 1.98W 1 70 → 420 V dc, 85 → 305 V ac PCB Mount Open Frame 35mm 11mm 18mm 6g 65% +85°C
RS Stock No. 181-2146
BrandRS PRO
£98.39
1 Tube of 19
Tube(s)
5V dc - 1.2A 6W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm 31g 76% +70°C