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. 161-8268
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. 671-6708
BrandRS PRO
MYR108.34
Each
units
15V dc - 700mA 10W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 19mm - - 50g
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. 161-8215
BrandRS PRO
MYR62.76
Each
units
12V dc - 2.1A 25.2W 88 → 264V ac 1 Chassis Mount Enclosed 850mm 58.5mm 36.5mm - - 250g
RS Stock No. 124-4710
BrandRS PRO
MYR179.21
Each
units
13.8V dc - 4.35A 60W 100 → 230V ac 1 Panel Mount Open Frame 101.6mm 50.8mm 29mm - - -
RS Stock No. 181-3252
BrandRS PRO
MYR119.01
Each
units
- - - - - - - - - - - - - -
RS Stock No. 828-0134
BrandRS PRO
MYR204.98
Each
units
12V dc - 2A 24W 100 → 240V ac 1 Cable Enclosed 140mm 80mm 85mm - - >1kg
RS Stock No. 181-2147
BrandRS PRO
MYR541.06
1 Tube of 19
Tube(s)
12V dc - 500mA 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
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. 828-0162
BrandRS PRO
MYR287.30
Each
units
12V dc - 4A 60W 100 → 240V ac 4 Wall Mount Enclosed 187.2mm 122.2mm 89.9mm - - <800g
RS Stock No. 161-8250
BrandRS PRO
MYR95.18
Each
units
48V dc - 1A 48W 90 → 264V ac 1 Chassis Mount Open Frame 101.6mm 51mm 30.5mm - - -
RS Stock No. 161-8223
BrandRS PRO
MYR341.22
Each
units
48V dc - 4.2A 200W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 181-2149
BrandRS PRO
MYR541.06
1 Tube of 19
Tube(s)
24V dc - 250mA 6W 100 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.36mm - - 31g
RS Stock No. 181-3258
BrandRS PRO
MYR140.86
Each
units
- - - - - - - - - - - - - -
RS Stock No. 161-8217
BrandRS PRO
MYR59.59
Each
units
24V dc - 1.1A 26W 88 → 264V ac 1 Chassis Mount Enclosed 85mm 58.5mm 36.5mm - - 250g
RS Stock No. 161-8248
BrandRS PRO
MYR95.18
Each
units
12V dc - 3.7A 44W 90 → 264V ac 1 Chassis Mount Open Frame 101.6mm 51mm 30.5mm - - -
RS Stock No. 770-4068
BrandRS PRO
MYR1,014.90
Each
units
15V dc - 50A 750W 127 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Enclosed 250mm 127mm 41mm - - 1.6kg
RS Stock No. 751-1419
BrandRS PRO
MYR211.50
Each
units
12V dc - 2.5A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 144-6282
BrandRS PRO
MYR92.42
Each
units
12V dc - 430mA 5W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 43g
RS Stock No. 828-0147
BrandRS PRO
MYR283.15
Each
units
12V dc - 5A 60W 100 → 240V ac 1 Cable Enclosed 187.2mm 122.2mm 89.9mm - - >1kg
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