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. 828-0162
BrandRS PRO
£54.66
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. 828-0181
BrandRS PRO
£70.04
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. 828-0131
BrandRS PRO
£34.04
Each
Units
12V dc - 1.5A 18W 1 100 → 240V ac Cable Enclosed 140mm 80mm 85mm >1kg >70(Min)% +40°C
RS Stock No. 667-5795
BrandRS PRO
£13.12
Each
Units
24V dc - 230mA 5.5W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 35g 78% +70°C
RS Stock No. 828-0134
BrandRS PRO
£34.58
Each
Units
12V dc - 2A 24W 1 100 → 240V ac Cable Enclosed 140mm 80mm 85mm >1kg >70(Min)% +40°C
RS Stock No. 828-0166
BrandRS PRO
£56.82
Each
Units
12V dc - 5A 60W 8 100 → 240V ac Cable Enclosed 187.2mm 122.2mm 89.9mm <800g 75(Min)% +40°C
RS Stock No. 771-9414
BrandRS PRO
£9.66
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. 124-4711
BrandRS PRO
£25.77
Each
Units
24V dc - 2.5A 60W 1 100 → 230V ac Panel Mount Open Frame 101.6mm 50.8mm 29mm - 89% +50°C
RS Stock No. 819-3961
BrandRS PRO
£87.34
Each
Units
15V dc - 10.4A 156W 1 88 → 264V ac Chassis Mount Enclosed 97mm 38mm 158mm 570g 92% +71°C
RS Stock No. 771-9372
BrandRS PRO
£7.10
Each
Units
9V dc - 333mA 3W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Ultra-Miniature 35mm 24mm 11mm - 76% +85°C
RS Stock No. 671-6701
BrandRS PRO
£16.75
Each
Units
9V dc - 1.1A 10W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 19mm 50g - +70°C
RS Stock No. 771-9423
BrandRS PRO
£28.51
Each
Units
12V dc - 1.25A 15W 1 120 → 375 V dc, 85 → 265 V ac PCB Mount Enclosed 76.2mm 50.8mm 22.8mm 160g 82% +71°C
RS Stock No. 771-9436
BrandRS PRO
£28.51
Each
Units
24V dc - 625mA 15W 1 120 → 375 V dc, 85 → 265 V ac PCB Mount Enclosed 76.2mm 50.8mm 22.8mm 160g 82% +71°C
RS Stock No. 671-6708
BrandRS PRO
£16.90
Each
Units
15V dc - 700mA 10W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 19mm 50g - +70°C
RS Stock No. 771-9420
BrandRS PRO
£28.51
Each
Units
5V dc - 3A 15W 1 120 → 375 V dc, 85 → 265 V ac PCB Mount Enclosed 76.2mm 50.8mm 22.8mm 160g 76% +71°C
RS Stock No. 678-3694
BrandRS PRO
£12.35
Each
Units
3.3V dc - 3.5A 11.5W 1 120 → 370 V dc, 85 → 264 V ac Chassis Mount Open Frame 70mm 48mm 22mm 65g - +70°C
RS Stock No. 667-5764
BrandRS PRO
£10.63
Each
Units
9V dc - 330mA 3W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 23mm 15mm 25g 74% +70°C
RS Stock No. 751-1412
BrandRS PRO
£32.95
Each
Units
24V dc - 833mA 20W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm 50g 83% +70°C
RS Stock No. 828-0147
BrandRS PRO
£53.96
Each
Units
12V dc - 5A 60W 1 100 → 240V ac Cable Enclosed 187.2mm 122.2mm 89.9mm >1kg 75(Min)% +40°C
RS Stock No. 711-2633
BrandRS PRO
£46.02
Each
Units
15V dc - 4A 60W 1 88 → 264V ac Chassis Mount Enclosed 98mm 82mm 35mm 310g 89% +71°C
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