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. 771-9379
BrandRS PRO
SGD13.65
Each
units
5V dc - 500mA 3W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Ultra-Miniature 35mm 24mm 11mm - 69% +85°C
RS Stock No. 819-3970
BrandRS PRO
SGD176.55
Each
units
24V dc - 6.5A 156W 1 88 → 264V ac Chassis Mount Enclosed 97mm 38mm 158mm 570g 92% +71°C
RS Stock No. 751-1406
BrandRS PRO
SGD50.35
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. 828-0134
BrandRS PRO
SGD59.13
Each
units
12V dc - 2A 24W 1 100 → 240V ac Cable Enclosed 140mm 80mm 85mm >1kg >70(Min)% +40°C
RS Stock No. 828-0162
BrandRS PRO
SGD93.47
Each
units
12V dc - 4A 60W 4 100 → 240V ac Wall Mount Enclosed 187.2mm 122.2mm 89.9mm <800g 75(Min)% +40°C
RS Stock No. 771-9414
BrandRS PRO
SGD17.54
Each
units
12V dc - 167mA 2W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 76% +70°C
RS Stock No. 667-5789
BrandRS PRO
SGD21.76
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. 751-1431
BrandRS PRO
SGD71.36
Each
units
24V dc - 1.7A 40.8W 1 85 → 265V ac PCB Mount Enclosed 89mm 63.5mm 25mm 250g - +71°C
RS Stock No. 771-9401
BrandRS PRO
SGD16.42
Each
units
5V dc - 400mA 2W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 70% +70°C
RS Stock No. 786-4738
BrandRS PRO
SGD18.88
Each
units
9V dc - 560mA 5W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Encapsulated 42mm 11mm 24mm 10g 72% +85°C
RS Stock No. 711-2636
BrandRS PRO
SGD84.83
Each
units
24V dc - 2.5A 60W 1 88 → 264V ac Chassis Mount Enclosed 98mm 82mm 35mm 310g 89% +71°C
RS Stock No. 667-5776
BrandRS PRO
SGD17.88
Each
units
24V dc - 125mA 3W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 23mm 15mm 25g 78% +70°C
RS Stock No. 667-5786
BrandRS PRO
SGD24.30
Each
units
12V dc - 420mA 5W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 35g 76% +70°C
RS Stock No. 181-2111
BrandRS PRO
SGD5.12
Each
units
12V dc - 250mA 3W 1 70 → 420 V dc, 85 → 305 V ac PCB Mount Open Frame 35mm 11mm 18mm 6g 74% +85°C
RS Stock No. 181-2112
BrandRS PRO
SGD4.96
Each
units
24V dc - 125mA 3W 1 70 → 420 V dc, 85 → 305 V ac PCB Mount Open Frame 35mm 11mm 18mm 6g 77% +85°C
RS Stock No. 181-2195
BrandRS PRO
SGD11.91
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. 161-8300
BrandRS PRO
SGD31.59
Each
units
36V dc - 4.3A 155W 1 170 → 264 V ac, 85 → 132 V ac Chassis Mount Enclosed 99mm 82mm 30mm 480g 89% +70°C
RS Stock No. 181-2108
BrandRS PRO
SGD5.12
Each
units
3V dc - 600mA 1.98W 1 70 → 420 V dc, 85 → 305 V ac PCB Mount Open Frame 35mm 11mm 18mm 6g 65% +85°C
RS Stock No. 181-2116
BrandRS PRO
SGD12.05
Each
units
9V dc - 1.1A 10W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.8mm 28.8mm 19mm 48g 80% +70°C
RS Stock No. 181-2146
BrandRS PRO
SGD185.50
1 Tube of 19
Tube(s)
5V dc - 1.2A 6W 1 100 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm 31g 76% +70°C
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