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. 786-4725
BrandRS PRO
MYR63.50
Each
units
3.3V dc - 1A 3.3W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Ultra-Miniature 42mm 11mm 24mm - 65% +85°C
RS Stock No. 667-5767
BrandRS PRO
MYR66.84
Each
units
3.3V dc - 700mA 2.3W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 23mm 15mm 25g 63% +70°C
RS Stock No. 771-9376
BrandRS PRO
MYR45.36
Each
units
12V dc - 250mA 3W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Ultra-Miniature 35mm 24mm 11mm - 78% +85°C
RS Stock No. 786-4729
BrandRS PRO
MYR64.50
Each
units
5V dc - 1A 5W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Encapsulated 42mm 11mm 24mm 10g 70% +85°C
RS Stock No. 786-4744
BrandRS PRO
MYR64.50
Each
units
24V dc - 210mA 5W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Encapsulated 42mm 11mm 24mm 10g 75% +85°C
RS Stock No. 786-4731
BrandRS PRO
MYR63.50
Each
units
12V dc - 420mA 5W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Encapsulated 42mm 11mm 24mm 10g 74% +85°C
RS Stock No. 771-9366
BrandRS PRO
MYR38.09
Each
units
12V dc - 83.3mA 1W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Miniature 35mm 24mm 11mm - 70% +85°C
RS Stock No. 771-9379
BrandRS PRO
MYR45.42
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. 771-9408
BrandRS PRO
MYR61.37
Each
units
3.3V dc - 600mA 2W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 65% +70°C
RS Stock No. 771-9385
BrandRS PRO
MYR44.49
Each
units
24V dc - 125mA 3W 1 100 → 400 V dc, 85 → 264 V ac PCB Mount Ultra-Miniature 35mm 24mm 11mm - 78% +85°C
RS Stock No. 771-9401
BrandRS PRO
MYR66.33
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. 771-9414
BrandRS PRO
MYR60.30
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. 771-9372
BrandRS PRO
MYR45.69
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. 771-9420
BrandRS PRO
MYR178.36
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. 181-2189
BrandRS PRO
MYR36.26
Each
units
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. 181-3265
BrandRS PRO
MYR198.37
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8244
BrandRS PRO
MYR1,004.15
Each
units
27V dc - 23A 799W 1 90 → 264V ac Chassis Mount Enclosed 226mm 116.5mm 41mm - 88% +70°C
RS Stock No. 181-2147
BrandRS PRO
MYR633.59
1 Tube of 19
Tube(s)
12V dc - 500mA 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. 161-8265
BrandRS PRO
MYR314.64
Each
units
24V dc - 8.1A 201.6W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Open Frame 128mm 76.5mm 37.1mm - 89% +70°C
RS Stock No. 771-9405
BrandRS PRO
MYR60.30
Each
units
9V dc - 222mA 2W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 72% +70°C
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