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. 528-8198
Mfr. Part No.NV1-1T000-C
BrandTDK-Lambda
£144.00
Each
Units
12V dc - 15A 175W 90 264V ac 1 Chassis Mount Enclosed 127mm 76mm 31.75mm - - 250g
RS Stock No. 680-2748
Mfr. Part No.LS50-5
BrandTDK-Lambda
£20.80
Each
Units
5V dc - 10A 50W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 3.9in 3.8in 1.4in - - 350g
RS Stock No. 377-0869
Mfr. Part No.CA1000/24
BrandTDK-Lambda
£879.96
Each
Units
24V dc - 40A 1kW 120 360 V dc, 85 265 V ac 1 Chassis Mount Enclosed 283.5mm 175.5mm 63mm - - 2.6kg
RS Stock No. 408-4311
Mfr. Part No.V4FFS 24V15A
BrandTDK-Lambda
£359.99
Each
Units
24V dc - 15A 450W 130 330 V dc, 90 264 V ac 1 Chassis Mount Enclosed 268.4mm 127mm 63.5mm - - 2kg
RS Stock No. 813-9128
Mfr. Part No.RWS-300B-24
BrandTDK-Lambda
£113.25
Each
Units
24V dc - 12.5A 300W 120 370 V dc, 85 265 V ac 1 Chassis Mount Enclosed 41mm 102mm 170mm - - 900g
RS Stock No. 680-2802
Mfr. Part No.LS100-24
BrandTDK-Lambda
£30.40
Each
Units
24V dc - 4.5A 100W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 6.3in 3.8in 1.5in - - 600g
RS Stock No. 680-2815
Mfr. Part No.LS150-12
BrandTDK-Lambda
£35.19
Each
Units
12V dc - 12.5A 150W 248 273 V dc, 76 264 V ac, 88 132 V ac 1 Chassis Mount Enclosed 7.8in 3.9in 1.5in - - 700g
RS Stock No. 635-2177
Mfr. Part No.HWS300-24
BrandTDK-Lambda
£330.02
Each
Units
24V dc - 14A 336W 120 330 V dc, 85 265 V ac 1 Chassis Mount Enclosed 6.5in 3.23in 2.4in - - 1kg
RS Stock No. 200-190
Mfr. Part No.NV1-453TT
BrandTDK-Lambda
£248.05
Each
Units
3.3/5/±12V dc - 1 A, 5 A, 15 A, 25 A 175W 90 264V ac 4 Chassis Mount Open Frame 5in 3in 1.25in - - 250g
RS Stock No. 635-2199
Mfr. Part No.HWS600-24
BrandTDK-Lambda
£448.65
Each
Units
24V dc - 27A 648W 120 330 V dc, 85 265 V ac 1 Chassis Mount Enclosed 6.5in 3.23in 3.94in - - 1.6kg
RS Stock No. 680-2827
Mfr. Part No.LS150-24
BrandTDK-Lambda
£35.19
Each
Units
24V dc - 6.5A 150W 248 273V dc 1 Chassis Mount Enclosed 7.8in 3.9in 1.5in - - 700g
RS Stock No. 338-1762
Mfr. Part No.JWS600-24
BrandTDK-Lambda
£721.57
Each
Units
24V dc - 27A 648W 120 330 V dc, 85 265 V ac 1 Chassis Mount Enclosed 200mm 92mm 160mm - - 3kg
RS Stock No. 338-1728
Mfr. Part No.JWS300-24
BrandTDK-Lambda
£383.19
Each
Units
24V dc - 14A 336W 120 330 V dc, 85 265 V ac 1 Chassis Mount Enclosed 190mm 92mm 120mm - - 1.9kg
RS Stock No. 680-2754
Mfr. Part No.LS50-24
BrandTDK-Lambda
£20.80
Each
Units
24V dc - 2.2A 50W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 3.9in 3.8in 1.4in - - 350g
RS Stock No. 231-7805
Mfr. Part No.CA600 24G
BrandTDK-Lambda
£628.77
Each
Units
24V dc - 25A 600W 160 358 V dc, 90 264 V ac 1 Rack Mount Enclosed 323mm 126.5mm 63mm - - 2.3kg
RS Stock No. 680-2708
Mfr. Part No.LS25-24
BrandTDK-Lambda
£18.22
Each
Units
24V dc - 1.1A 25W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 3.1in 2in 1.1in - - 170g
RS Stock No. 680-2770
Mfr. Part No.LS75-24
BrandTDK-Lambda
£24.00
Each
Units
24V dc - 3.2A 75W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 5.1in 3.8in 1.5in - - 410g
RS Stock No. 680-2742
Mfr. Part No.LS50-12
BrandTDK-Lambda
£20.80
Each
Units
12V dc - 4.2A 50W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 3.9in 3.8in 1.4in - - 350g
RS Stock No. 739-7979
Mfr. Part No.LS200-24
BrandTDK-Lambda
£68.12
Each
Units
24V dc - 8.4A 200W 120 373 V dc, 85 264 V ac 1 Chassis Mount Enclosed 210mm 98mm 41mm - - 700g
RS Stock No. 680-2798
Mfr. Part No.LS100-12
BrandTDK-Lambda
£30.40
Each
Units
12V dc - 8.5A 100W 125 373 V dc, 88 264 V ac 1 Chassis Mount Enclosed 6.3in 3.8in 1.5in - - 600g