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. 916-3936
BrandRS PRO
MYR232.74
Each
units
12V dc - 10A 120W 100 → 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 711-2602
BrandRS PRO
MYR158.26
Each
units
24V dc - 900mA 21.6W 88 → 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS Stock No. 181-2147
BrandRS PRO
MYR541.06
1 Tube of 19
Tube(s)
12V dc - 500mA 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 181-2192
BrandRS PRO
MYR34.71
Each
units
5V dc - 1.2A 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 181-2120
BrandRS PRO
MYR47.48
Each
units
5V dc - 2.7A 13.5W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 711-2627
BrandRS PRO
MYR201.76
Each
units
24V dc - 1.5A 36W 88 → 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 161-8241
BrandRS PRO
MYR859.39
Each
units
36V dc - 17.5A 630W 90 → 264V ac 1 Chassis Mount Enclosed 218mm 116.5mm 41mm - - -
RS Stock No. 181-3261
BrandRS PRO
MYR146.41
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8249
BrandRS PRO
MYR95.18
Each
units
24V dc - 1.9A 45.6W 90 → 264V ac 1 Chassis Mount Open Frame 101.6mm 51mm 30.5mm - - -
RS Stock No. 181-2128
BrandRS PRO
MYR63.96
Each
units
12V dc - 2.1A 25W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 161-8294
BrandRS PRO
MYR78.36
Each
units
24V dc - 4.5A 108W 85 → 264V ac 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS Stock No. 181-2199
BrandRS PRO
MYR32.14
Each
units
3V dc - 1A 3.3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-3268
BrandRS PRO
MYR151.62
Each
units
- - - - - - - - - - - - - -
RS Stock No. 124-4713
BrandRS PRO
MYR179.21
Each
units
32V dc - 1.87A 60W 100 → 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 771-9388
BrandRS PRO
MYR49.26
Each
units
5V dc - 200mA 1W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 181-2134
BrandRS PRO
MYR332.48
1 Tube of 13
Tube(s)
9V dc - 330mA 3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 144-6283
BrandRS PRO
MYR92.46
Each
units
24V dc - 230mA 5.5W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 43g
RS Stock No. 181-2138
BrandRS PRO
MYR332.48
1 Tube of 13
Tube(s)
24V dc - 125mA 3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 161-8262
BrandRS PRO
MYR295.58
Each
units
48V dc - 2.6A 124.8W 90 → 264V ac 1 Chassis Mount Open Frame 127mm 76mm 30.5mm - - -
RS Stock No. 667-5786
BrandRS PRO
MYR76.50
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
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