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. 771-9385
BrandRS PRO
$11.14
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. 771-9417
BrandRS PRO
$15.12
Each
units
15V dc - 133mA 2W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 751-1421
BrandRS PRO
$59.43
Each
units
24V dc - 1.25A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 181-2125
BrandRS PRO
$19.12
Each
units
12V dc - 1.66A 20W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 181-2194
BrandRS PRO
$10.12
Each
units
12V dc - 250mA 3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 771-9423
BrandRS PRO
$44.58
Each
units
12V dc - 1.25A 15W 120 → 375 V dc, 85 → 265 V ac 1 PCB Mount Enclosed 76.2mm 50.8mm 22.8mm - - 160g
RS Stock No. 916-3927
BrandRS PRO
$61.49
Each
units
12V dc - 5A 60W 100 → 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 751-1425
BrandRS PRO
$68.98
Each
units
5V dc - 8A 40W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 181-2114
BrandRS PRO
$14.05
Each
units
3V dc - 2A 6.6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 48g
RS Stock No. 181-2130
BrandRS PRO
$22.26
Each
units
24V dc - 1.1A 25W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 161-8298
BrandRS PRO
$38.34
Each
units
15V dc - - 150W 170 → 264 V ac, 85 → 132 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 480g
RS Stock No. 144-6265
BrandRS PRO
$61.92
Each
units
5V dc - 2.8A 14W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 31mm - - 135g
RS Stock No. 181-2200
BrandRS PRO
$11.57
Each
units
5V dc - 1A 5W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 144-6269
BrandRS PRO
$71.45
Each
units
5V dc - 4.1A 20.5W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 32mm - - 170g
RS Stock No. 181-2126
BrandRS PRO
$19.12
Each
units
24V dc - 833mA 20W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 916-3936
BrandRS PRO
$71.23
Each
units
12V dc - 10A 120W 100 → 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 181-2187
BrandRS PRO
$11.20
Each
units
24V dc - 210mA 5W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 161-8244
BrandRS PRO
$364.94
Each
units
27V dc - 23A 799W 90 → 264V ac 1 Chassis Mount Enclosed 226mm 116.5mm 41mm - - -
RS Stock No. 828-0190
BrandRS PRO
$106.59
Each
units
27.6V dc - 1.5A 42W 195 → 253V ac 1 Wall Mount Enclosed 310mm 240mm 80mm - - 1kg
RS Stock No. 786-4735
BrandRS PRO
$16.97
Each
units
15V dc - 340mA 5W 100 → 400 V dc, 85 → 264 V ac 1 PCB Mount Ultra-Miniature 42mm 11mm 24mm - - -
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