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. 916-3939
BrandRS PRO
€58.18
Each
units
12V dc - 10A 120W 18 100 → 240V ac Wall Mount Enclosed 250mm 215mm 59mm 1.9kg 81% +45°C
RS Stock No. 711-2614
BrandRS PRO
€46.89
Each
units
12V dc - 3A 36W 1 88 → 264V ac Chassis Mount Enclosed 78mm 51mm 28mm 180g 86% +71°C
RS Stock No. 916-3923
BrandRS PRO
€86.26
Each
units
12V dc - 20A 240W 18 100 → 240V ac Wall Mount Enclosed 265mm 205mm 90mm 2.8kg 81% +45°C
RS Stock No. 771-9388
BrandRS PRO
€11.22
Each
units
5V dc - 200mA 1W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 68% +70°C
RS Stock No. 771-9366
BrandRS PRO
€7.35
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. 916-3927
BrandRS PRO
€47.97
Each
units
12V dc - 5A 60W 4 100 → 240V ac Wall Mount Enclosed 250mm 215mm 59mm 1.9kg 81% +45°C
RS Stock No. 916-3936
BrandRS PRO
€55.58
Each
units
12V dc - 10A 120W 4 100 → 240V ac Wall Mount Enclosed 250mm 215mm 59mm 1.9kg 81% +45°C
RS Stock No. 711-2620
BrandRS PRO
€55.03
Each
units
5V dc - 9A 45W 1 88 → 264V ac Chassis Mount Enclosed 98mm 82mm 35mm 310g 82% +71°C
RS Stock No. 786-4744
BrandRS PRO
€12.57
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. 667-5760
BrandRS PRO
€13.03
Each
units
5V dc - 600mA 3W 1 110 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 37mm 23mm 15mm 25g 72% +70°C
RS Stock No. 786-4729
BrandRS PRO
€12.57
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. 711-2633
BrandRS PRO
€55.03
Each
units
15V dc - 4A 60W 1 88 → 264V ac Chassis Mount Enclosed 98mm 82mm 35mm 310g 89% +71°C
RS Stock No. 916-3920
BrandRS PRO
€55.41
Each
units
12V dc - 10A 120W 9 100 → 240V ac Wall Mount Enclosed 250mm 215mm 59mm 1.9kg 81% +45°C
RS Stock No. 916-3933
BrandRS PRO
€75.26
Each
units
24V ac - 5A 120VA 4 230V ac Wall Mount Enclosed 207mm 122mm 90mm 2.1kg - -
RS Stock No. 771-9398
BrandRS PRO
€11.02
Each
units
24V dc - 42mA 1W 1 120 → 430 V dc, 85 → 305 V ac PCB Mount Encapsulated 33.7mm 22.2mm 18mm 20g 75% +70°C
RS Stock No. 786-4731
BrandRS PRO
€12.38
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. 828-0147
BrandRS PRO
€67.22
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. 828-0197
BrandRS PRO
€139.27
Each
units
13.8V dc - 10A 140W 1 195 → 253V ac Wall Mount Enclosed 240mm 225mm 80mm 1kg >70% +40°C
RS Stock No. 771-9376
BrandRS PRO
€8.84
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. 144-6267
BrandRS PRO
€28.91
Each
units
15V dc - 1A 15W 1 264 V ac, 370 V dc Chassis Mount Encapsulated 96.1mm 54mm 31mm 135g 80 % @ 230 +70°C
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