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. 771-9391
BrandRS PRO
MYR36.77
Each
units
12V dc - 83mA 1W 120 430 V dc, 85 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 181-3264
BrandRS PRO
MYR176.95
Each
units
- - - - - - - - - - - - - -
RS Stock No. 144-6283
BrandRS PRO
MYR92.46
Each
units
24V dc - 230mA 5.5W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 43g
RS Stock No. 751-1421
BrandRS PRO
MYR207.35
Each
units
24V dc - 1.25A 30W 85 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 678-3694
BrandRS PRO
MYR65.30
Each
units
3.3V dc - 3.5A 11.5W 120 370 V dc, 85 264 V ac 1 Chassis Mount Open Frame 70mm 48mm 22mm - - 65g
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. 751-1406
BrandRS PRO
MYR179.36
Each
units
5V dc - 3.6A 18W 120 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm - - 50g
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. 181-3256
BrandRS PRO
MYR135.31
Each
units
- - - - - - - - - - - - - -
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. 181-2116
BrandRS PRO
MYR40.38
Each
units
9V dc - 1.1A 10W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 48g
RS Stock No. 181-2121
BrandRS PRO
MYR47.48
Each
units
12V dc - 1.25A 15W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g
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. 181-3263
BrandRS PRO
MYR146.41
Each
units
- - - - - - - - - - - - - -
RS Stock No. 916-3939
BrandRS PRO
MYR266.26
Each
units
12V dc - 10A 120W 100 240V ac 18 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
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. 819-3961
BrandRS PRO
MYR477.84
Each
units
15V dc - 10.4A 156W 88 264V ac 1 Chassis Mount Enclosed 97mm 38mm 158mm - - 570g
RS Stock No. 161-8244
BrandRS PRO
MYR1,102.14
Each
units
27V dc - 23A 799W 90 264V ac 1 Chassis Mount Enclosed 226mm 116.5mm 41mm - - -
RS Stock No. 161-8273
BrandRS PRO
MYR70.08
Each
units
12V dc - 3A 36W - 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 671-6704
BrandRS PRO
MYR116.07
Each
units
12V dc - 900mA 10W 120 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 19mm - - 50g
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