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. 124-4708
BrandRS PRO
$42.96
Each
units
5V dc - 8A 60W 100 → 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 144-6268
BrandRS PRO
$57.27
Each
units
24V dc - 625mA 15W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 31mm - - 135g
RS Stock No. 161-8289
BrandRS PRO
$27.89
Each
units
36V dc - 2.1A 75.6W 100 → 240V ac 1 Chassis Mount Enclosed 97mm 99mm 30mm - - 300g
RS Stock No. 161-8237
BrandRS PRO
$241.00
Each
units
24V dc - 21A 504W 88 → 264V ac 1 Chassis Mount Enclosed 183mm 120mm 83.5mm - - -
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. 181-2116
BrandRS PRO
$14.05
Each
units
9V dc - 1.1A 10W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 48g
RS Stock No. 181-2136
BrandRS PRO
$115.77
1 Tube of 13
Tube(s)
12V dc - 250mA 3W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-2145
BrandRS PRO
$188.40
1 Tube of 19
Tube(s)
3V dc - 1.25A 4.1W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 161-8224
BrandRS PRO
$111.66
Each
units
5V dc - 48A 240W 85 → 264V ac 1 Chassis Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8268
BrandRS PRO
$110.63
Each
units
27.6V dc - 0 → 5A 140W 195 → 253V ac 2 Chassis Mount Enclosed 200mm 110mm 50mm - - 900g
RS Stock No. 161-8281
BrandRS PRO
$20.14
Each
units
24V dc - 2.2A 52.8W 100 → 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
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. 161-8278
BrandRS PRO
$24.18
Each
units
5V dc - 10A 50W 100 → 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
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. 124-4710
BrandRS PRO
$44.54
Each
units
13.8V dc - 4.35A 60W 100 → 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 181-2123
BrandRS PRO
$19.12
Each
units
3V dc - 3.6A 11.8W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
RS Stock No. 124-4712
BrandRS PRO
$48.15
Each
units
27.6V dc - 2.16A 60W 100 → 230V ac 2 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 181-2186
BrandRS PRO
$10.12
Each
units
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. 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. 144-6271
BrandRS PRO
$64.16
Each
units
15V dc - 1.6A 25W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 32mm - - 170g
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