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. 161-8299
BrandRS PRO
$28.46
Each
units
24V dc - 6.5A 156W 170 → 264 V ac, 85 → 132 V ac 1 Chassis Mount Enclosed 159mm 97mm 30mm - - 480g
RS Stock No. 181-2197
BrandRS PRO
$12.10
Each
units
24V dc - 250mA 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 819-3961
BrandRS PRO
$129.44
Each
units
15V dc - 10.4A 156W 88 → 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 144-6266
BrandRS PRO
$63.78
Each
units
12V dc - 1.25A 15W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 31mm - - 135g
RS Stock No. 144-6270
BrandRS PRO
$71.45
Each
units
12V dc - 2.1A 25W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 32mm - - 170g
RS Stock No. 828-0147
BrandRS PRO
$82.03
Each
units
12V dc - 5A 60W 100 → 240V ac 1 Cable Enclosed 187.2mm 122.2mm 89.9mm - - >1kg
RS Stock No. 181-2115
BrandRS PRO
$14.05
Each
units
5V dc - 2A 10W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 48g
RS Stock No. 181-2120
BrandRS PRO
$16.52
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. 161-8271
BrandRS PRO
$90.78
Each
units
48V dc - 4.2A 200W 90 → 264V ac 1 Chassis Enclosed 200mm 99mm 38mm - - -
RS Stock No. 161-8223
BrandRS PRO
$111.66
Each
units
48V dc - 4.2A 200W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 711-2608
BrandRS PRO
$47.41
Each
units
15V dc - 1.4A 21W 88 → 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS Stock No. 124-4714
BrandRS PRO
$49.60
Each
units
48V dc - 1.25A 60W 100 → 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 828-0166
BrandRS PRO
$94.18
Each
units
12V dc - 5A 60W 100 → 240V ac 8 Cable Enclosed 187.2mm 122.2mm 89.9mm - - <800g
RS Stock No. 181-2132
BrandRS PRO
$115.77
1 Tube of 13
Tube(s)
3V dc - 770mA 2.3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 144-6277
BrandRS PRO
$158.35
Each
units
24V dc - 2.5A 60W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 135mm 70mm 38.5mm - - 400g
RS Stock No. 181-2198
BrandRS PRO
$10.12
Each
units
24V dc - 125mA 3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-2195
BrandRS PRO
$12.10
Each
units
15V dc - 400mA 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 144-6275
BrandRS PRO
$120.38
Each
units
24V dc - 1.667A 40W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 135mm 70mm 33.5mm - - 310g
RS Stock No. 161-8265
BrandRS PRO
$117.74
Each
units
24V dc - 8.1A 201.6W 127 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Open Frame 128mm 76.5mm 37.1mm - - -
RS Stock No. 161-8294
BrandRS PRO
$32.01
Each
units
24V dc - 4.5A 108W 85 → 264V ac 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
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