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. 667-5760
BrandRS PRO
£10.02
Each
Units
5V dc - 600mA 3W 110 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 667-5789
BrandRS PRO
£12.19
Each
Units
5V dc - 1A 5W 110 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm - - 35g
RS Stock No. 771-9379
BrandRS PRO
£6.81
Each
Units
5V dc - 500mA 3W 100 → 400 V dc, 85 → 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 786-4725
BrandRS PRO
£9.52
Each
Units
3.3V dc - 1A 3.3W 100 → 400 V dc, 85 → 264 V ac 1 PCB Mount Ultra-Miniature 42mm 11mm 24mm - - -
RS Stock No. 916-3920
BrandRS PRO
£42.62
Each
Units
12V dc - 10A 120W 100 → 240V ac 9 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 667-5786
BrandRS PRO
£12.17
Each
Units
12V dc - 420mA 5W 110 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm - - 35g
RS Stock No. 751-1431
BrandRS PRO
£39.98
Each
Units
24V dc - 1.7A 40.8W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 916-3939
BrandRS PRO
£44.75
Each
Units
12V dc - 10A 120W 100 → 240V ac 18 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS Stock No. 711-2620
BrandRS PRO
£42.33
Each
Units
5V dc - 9A 45W 88 → 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 771-9376
BrandRS PRO
£6.80
Each
Units
12V dc - 250mA 3W 100 → 400 V dc, 85 → 264 V ac 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9388
BrandRS PRO
£8.63
Each
Units
5V dc - 200mA 1W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 711-2636
BrandRS PRO
£42.33
Each
Units
24V dc - 2.5A 60W 88 → 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 711-2614
BrandRS PRO
£36.07
Each
Units
12V dc - 3A 36W 88 → 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 916-3933
BrandRS PRO
£55.00
Each
Units
24V ac - 5A 120VA 230V ac 4 Wall Mount Enclosed 207mm 122mm 90mm - - 2.1kg
RS Stock No. 916-3917
BrandRS PRO
£48.62
Each
Units
24V ac - 5A 120VA 230V ac 2 Wall Mount Enclosed 210mm 120mm 93mm - - <2kg
RS Stock No. 771-9366
BrandRS PRO
£5.65
Each
Units
12V dc - 83.3mA 1W 100 → 400 V dc, 85 → 264 V ac 1 PCB Mount Miniature 35mm 24mm 11mm - - -
RS Stock No. 751-1415
BrandRS PRO
£35.74
Each
Units
5V dc - 6A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 711-2627
BrandRS PRO
£36.07
Each
Units
24V dc - 1.5A 36W 88 → 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 916-3923
BrandRS PRO
£66.35
Each
Units
12V dc - 20A 240W 100 → 240V ac 18 Wall Mount Enclosed 265mm 205mm 90mm - - 2.8kg
RS Stock No. 916-3936
BrandRS PRO
£42.75
Each
Units
12V dc - 10A 120W 100 → 240V ac 4 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
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