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. 181-2198
BrandRS PRO
$8.84
Each
units
24V dc - 125mA 3W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 24.5mm 18mm 25g 78% +70°C
RS Stock No. 161-8253
BrandRS PRO
$34.39
Each
units
15V dc - 3.6A 54W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Open Frame 101.6mm 51mm 30mm - 84% +70°C
RS Stock No. 161-8285
BrandRS PRO
$30.61
Each
units
12V dc - 6A 72W 1 100 → 240V ac Chassis Mount Enclosed 97mm 99mm 30mm 300g 88% +50°C
RS Stock No. 751-1409
BrandRS PRO
$66.51
Each
units
12V dc - 1.66A 20W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm 50g 82% +70°C
RS Stock No. 161-8283
BrandRS PRO
$22.81
Each
units
48V dc - 1.1A 52.8W 1 100 → 240V ac Chassis Mount Enclosed 99mm 82mm 30mm 230g 90% +50°C
RS Stock No. 161-8237
BrandRS PRO
$244.61
Each
units
24V dc - 21A 504W 1 88 → 264V ac Chassis Mount Enclosed 183mm 120mm 83.5mm - 90% +70°C
RS Stock No. 828-0181
BrandRS PRO
$136.84
Each
units
13.8V dc - 1.5A 20W 1 195 → 253V ac Wall Mount Enclosed 240mm 225mm 80mm 1kg >70% +40°C
RS Stock No. 161-8223
BrandRS PRO
$94.35
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. 181-3263
BrandRS PRO
$50.97
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-3258
BrandRS PRO
$49.05
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8277
BrandRS PRO
$21.54
Each
units
48V dc - 800mA 38W 1 - Chassis Mount Enclosed 99mm 82mm 30mm 230g 90% -
RS Stock No. 181-2131
BrandRS PRO
$22.26
Each
units
48V dc - 500mA 25W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 70mm 48mm 23.5mm 120g 87% +70°C
RS Stock No. 181-2199
BrandRS PRO
$9.79
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. 828-0190
BrandRS PRO
$136.84
Each
units
27.6V dc - 1.5A 42W 1 195 → 253V ac Wall Mount Enclosed 310mm 240mm 80mm 1kg >70% +40°C
RS Stock No. 161-8254
BrandRS PRO
$34.39
Each
units
24V dc - 2.5A 60W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Open Frame 101.6mm 51mm 30mm - 87% +70°C
RS Stock No. 161-8287
BrandRS PRO
$27.09
Each
units
15V dc - 5A 75W 1 100 → 240V ac Chassis Mount Enclosed 97mm 99mm 30mm 300g 88% +50°C
RS Stock No. 181-2195
BrandRS PRO
$10.58
Each
units
15V dc - 400mA 6W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm 31g 77% +70°C
RS Stock No. 144-6281
BrandRS PRO
$25.55
Each
units
5V dc - 1A 5W 1 264 V ac, 370 V dc PCB Mount Encapsulated 53.8mm 28.8mm 19mm 43g - +70°C
RS Stock No. 751-1406
BrandRS PRO
$53.29
Each
units
5V dc - 3.6A 18W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm 50g 78% +70°C
RS Stock No. 161-8270
BrandRS PRO
$102.76
Each
units
24V dc - 8.4A 200W 1 90 → 264V ac Chassis Mount Enclosed 200mm 99mm 38mm - - +70°C
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