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. 122-7870
Mfr. Part No.VCS100US24
BrandXP Power
£23.86
Each
Units
24V dc - 4.17A 100W 127 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 159mm 98.2mm 42mm - - 500g
RS Stock No. 122-7858
Mfr. Part No.SHP350PS28
BrandXP Power
£101.22
Each
Units
28V dc - 12.5A 350W 85 → 264V ac 1 Chassis Mount Enclosed 179.3mm 91.44mm 53.34mm - - 788g
RS Stock No. 122-7875
Mfr. Part No.VCS50US24
BrandXP Power
£15.64
Each
Units
24V dc - 2.1A 50W 127 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 110.5mm 78mm 35mm - - 250g
RS Stock No. 122-7073
Mfr. Part No.ECM40UT31
BrandXP Power
£36.29
Each
Units
5/±12V dc - 2 A, 6 A, 500 mA 40W 120 → 370 V dc, 90 → 264 V ac 3 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS Stock No. 122-7046
Mfr. Part No.ECM100US12
BrandXP Power
£68.26
Each
Units
12V dc - 8.3A 100W 120 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Open Frame 114.3mm 63.5mm 27mm - - 180g
RS Stock No. 122-7077
Mfr. Part No.ECM60UD21
BrandXP Power
£38.88
Each
Units
5/12V dc - 3 A, 8 A 60W 120 → 370 V dc, 90 → 264 V ac 2 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS Stock No. 122-7648
Mfr. Part No.ECE05US05
BrandXP Power
£15.26
Each
Units
5V dc - 1A 5W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 25.4mm 25.4mm 15.24mm - - 16g
RS Stock No. 122-7119
Mfr. Part No.ECS100US12
BrandXP Power
£45.77
Each
Units
12V dc - 8.3A 100W 120 → 370 V dc, 80 → 264 V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 28.3mm - - 175g
RS Stock No. 122-9838
Mfr. Part No.ECM100US24
BrandXP Power
£68.26
Each
Units
24V dc - 4.1A 100W 120 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Open Frame 114.3mm 63.5mm 27mm - - 180g
RS Stock No. 122-7794
Mfr. Part No.ECL30UD03-S
BrandXP Power
£55.94
Each
Units
5/12V dc - 1.3 A, 3 A 30W 120 → 370 V dc, 85 → 264 V ac 2 Chassis Mount Encapsulated 96mm 40mm 28.5mm - - 175g
RS Stock No. 122-7575
Mfr. Part No.VCT60US24
BrandXP Power
£18.93
Each
Units
24V dc - 2.5A 60W 85 → 264V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 20mm - - 130g
RS Stock No. 122-7074
Mfr. Part No.ECM40UT32
BrandXP Power
£36.29
Each
Units
5/12/24V dc - 1 A, 6 A, 500 mA 40W 120 → 370 V dc, 90 → 264 V ac 3 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS Stock No. 122-7090
Mfr. Part No.ECM60UT31
BrandXP Power
£41.47
Each
Units
5/±12V dc - 3 A, 8 A, 500 mA 60W 120 → 370 V dc, 90 → 264 V ac 3 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS Stock No. 122-7664
Mfr. Part No.ECE20US12
BrandXP Power
£35.60
Each
Units
12V dc - 1.67A 20W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 52.4mm 27.2mm 23mm - - 60g
RS Stock No. 122-7643
Mfr. Part No.GCS350PS24
BrandXP Power
£114.42
Each
Units
24V dc - 14.6A 350W 85 → 264V ac 1 Chassis Mount Open Frame 127mm 76.2mm 36.3mm - - 290g
RS Stock No. 122-7873
Mfr. Part No.VCS50US12
BrandXP Power
£15.64
Each
Units
12V dc - 4.2A 50W 127 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 110.5mm 78mm 35mm - - 250g
RS Stock No. 122-7644
Mfr. Part No.GCS350PS28
BrandXP Power
£114.42
Each
Units
28V dc - 12.5A 350W 85 → 264V ac 1 Chassis Mount Open Frame 127mm 76.2mm 36.3mm - - 290g
RS Stock No. 122-7573
Mfr. Part No.VCT60US12
BrandXP Power
£18.93
Each
Units
12V dc - 5A 60W 85 → 264V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 20mm - - 130g
RS Stock No. 122-7646
Mfr. Part No.GCS350PS56
BrandXP Power
£114.42
Each
Units
56V dc - 6.25A 350W 85 → 264V ac 1 Chassis Mount Open Frame 127mm 76.2mm 36.3mm - - 290g
RS Stock No. 122-7148
Mfr. Part No.ECS65US18
BrandXP Power
£29.67
Each
Units
18.5V dc - 3.4A 65W 120 → 370 V dc, 80 → 264 V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 23.2mm - - 175g