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. 181-2149
BrandRS PRO
MYR633.59
1 Tube of 19
Tube(s)
24V dc - 250mA 6W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm 31g 80% +70°C
RS Stock No. 181-2128
BrandRS PRO
MYR66.61
Each
units
12V dc - 2.1A 25W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 70mm 48mm 23.5mm 120g 83% +70°C
RS Stock No. 161-8234
BrandRS PRO
MYR739.72
Each
units
36V dc - 14A 480W 1 90 → 264V ac Chassis Mount Enclosed 218mm 116.5mm 41mm - - +70°C
RS Stock No. 667-5789
BrandRS PRO
MYR82.16
Each
units
5V dc - 1A 5W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 35g 72% +70°C
RS Stock No. 819-3970
BrandRS PRO
MYR541.31
Each
units
24V dc - 6.5A 156W 1 88 → 264V ac Chassis Mount Enclosed 97mm 38mm 158mm 570g 92% +71°C
RS Stock No. 828-0134
BrandRS PRO
MYR223.31
Each
units
12V dc - 2A 24W 1 100 → 240V ac Cable Enclosed 140mm 80mm 85mm >1kg >70(Min)% +40°C
RS Stock No. 161-8218
BrandRS PRO
MYR293.89
Each
units
5V dc - 40A 200W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Enclosed 199mm 99mm 50mm - 79% +70°C
RS Stock No. 161-8252
BrandRS PRO
MYR108.25
Each
units
12V dc - 4.5A 54W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Open Frame 101.6mm 51mm 30mm - 83% +70°C
RS Stock No. 144-6283
BrandRS PRO
MYR92.46
Each
units
24V dc - 230mA 5.5W 1 264 V ac, 370 V dc PCB Mount Encapsulated 53.8mm 28.8mm 19mm 43g - +70°C
RS Stock No. 161-8224
BrandRS PRO
MYR302.19
Each
units
5V dc - 48A 240W 1 85 → 264V ac Chassis Mount Enclosed 199mm 99mm 50mm - - +75°C
RS Stock No. 181-2110
BrandRS PRO
MYR21.08
Each
units
9V dc - 333mA 3W 1 70 → 420 V dc, 85 → 305 V ac PCB Mount Open Frame 35mm 11mm 18mm 6g 73% +85°C
RS Stock No. 819-3961
BrandRS PRO
MYR599.73
Each
units
15V dc - 10.4A 156W 1 88 → 264V ac Chassis Mount Enclosed 97mm 38mm 158mm 570g 92% +71°C
RS Stock No. 181-2145
BrandRS PRO
MYR633.59
1 Tube of 19
Tube(s)
3V dc - 1.25A 4.1W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm 31g 70% +70°C
RS Stock No. 181-3253
BrandRS PRO
MYR132.25
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8295
BrandRS PRO
MYR92.90
Each
units
36V dc - 2.8A 101W 1 85 → 264V ac Chassis Mount Enclosed 129mm 97mm 30mm 340g 90.5% +70°C
RS Stock No. 181-3256
BrandRS PRO
MYR135.31
Each
units
- - - - - - - - - - - - - -
RS Stock No. 916-3939
BrandRS PRO
MYR274.62
Each
units
12V dc - 10A 120W 18 100 → 240V ac Wall Mount Enclosed 250mm 215mm 59mm 1.9kg 81% +45°C
RS Stock No. 181-3258
BrandRS PRO
MYR140.86
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-2114
BrandRS PRO
MYR40.38
Each
units
3V dc - 2A 6.6W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.8mm 28.8mm 19mm 48g 71% +70°C
RS Stock No. 181-2118
BrandRS PRO
MYR40.38
Each
units
24V dc - 450mA 10W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.8mm 28.8mm 19mm 48g 83% +70°C