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. 161-8275
BrandRS PRO
MYR64.13
Each
units
24V dc - 1.5A 36W - 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 181-2138
BrandRS PRO
MYR332.48
1 Tube of 13
Tube(s)
24V dc - 125mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 161-8235
BrandRS PRO
MYR905.95
Each
units
48V dc - 11A 480W 90 264V ac 1 Chassis Mount Enclosed 218mm 116.5mm 41mm - - 8.7kg
RS Stock No. 161-8251
BrandRS PRO
MYR96.81
Each
units
5V dc - 8A 40W 127 370 V dc, 90 264 V ac 1 Chassis Mount Open Frame 101.6mm 51mm 30mm - - -
RS Stock No. 819-3967
BrandRS PRO
MYR477.84
Each
units
12V dc - 13A 156W 88 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 916-3917
BrandRS PRO
MYR291.13
Each
units
24V ac - 5A 120VA 230V ac 2 Wall Mount Enclosed 210mm 120mm 93mm - - <2kg
RS Stock No. 161-8268
BrandRS PRO
MYR334.41
Each
units
27.6V dc - 0 5A 140W 195 253V ac 2 Chassis Mount Enclosed 200mm 110mm 50mm - - 900g
RS Stock No. 181-3263
BrandRS PRO
MYR146.41
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-2188
BrandRS PRO
MYR29.05
Each
units
5V dc - 600mA 3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 181-2115
BrandRS PRO
MYR40.38
Each
units
5V dc - 2A 10W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 48g
RS Stock No. 771-8543
BrandRS PRO
MYR340.39
Each
units
15V dc - 7A 105W 88 264V ac 1 Chassis Mount Enclosed 158mm 97mm 38mm - - 520g
RS Stock No. 181-2128
BrandRS PRO
MYR63.96
Each
units
12V dc - 2.1A 25W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 120g
RS Stock No. 828-0166
BrandRS PRO
MYR323.92
Each
units
12V dc - 5A 60W 100 240V ac 8 Cable Enclosed 187.2mm 122.2mm 89.9mm - - <800g
RS Stock No. 771-9423
BrandRS PRO
MYR152.79
Each
units
12V dc - 1.25A 15W 120 375 V dc, 85 265 V ac 1 PCB Mount Enclosed 76.2mm 50.8mm 22.8mm - - 160g
RS Stock No. 144-6270
BrandRS PRO
MYR194.34
Each
units
12V dc - 2.1A 25W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 96.1mm 54mm 32mm - - 170g
RS Stock No. 161-8293
BrandRS PRO
MYR92.90
Each
units
15V dc - - 105W 85 264V ac 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS Stock No. 181-2148
BrandRS PRO
MYR559.30
1 Tube of 19
Tube(s)
15V dc - 400mA 6W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 711-2624
BrandRS PRO
MYR267.01
Each
units
12V dc - 5A 60W 88 264V ac 1 Chassis Mount Enclosed 98mm 82mm 35mm - - 310g
RS Stock No. 144-6276
BrandRS PRO
MYR430.55
Each
units
12V dc - 5A 60W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 135mm 70mm 38.5mm - - 400g
RS Stock No. 161-8209
BrandRS PRO
MYR56.71
Each
units
5V dc - 3A 15W 88 264V ac 1 Chassis Mount Enclosed 85mm 58.5mm 36.5mm - - 250g
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