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 Number of Outputs Input Voltage Mounting Type Package Type Length Width Depth Weight Efficiency Maximum Temperature
RS Stock No. 449-3125
Mfr. Part No.TXL 025-24S
BrandTRACOPOWER
£28.83
Each
Units
24 V dc TXL 1.1A 25W 1 85 → 264V ac Chassis Mount Enclosed 93mm 51mm 28.5mm 190g 70 → 84% +70°C
RS Stock No. 183-0054
Mfr. Part No.LPT45
£38.56
Each
Units
±15 V dc, 5 V dc - 2.5 A, 5 A, 700 mA 40W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS Stock No. 621-0635
Mfr. Part No.RS-75-12
BrandMean Well
£18.20
Each
Units
12 V dc - 6A 72W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 129mm 97mm 38mm 410g 84.5% +70°C
RS Stock No. 122-7870
Mfr. Part No.VCS100US24
BrandXP Power
£24.15
Each
Units
24 V dc - 4.17A 100W 1 85 → 264 V ac, 127 → 370 V dc Chassis Mount Enclosed 159mm 98.2mm 42mm 500g 86.5% +70°C
RS Stock No. 434-2803
Mfr. Part No.TXL 150-24S
BrandTRACOPOWER
£74.84
Each
Units
24 V dc TXL 6.3A 151W 1 85 → 264V ac Chassis Mount Enclosed 211mm 99mm 50mm 890g 70 → 84% +70°C
RS Stock No. 680-2748
Mfr. Part No.LS50-5
BrandTDK-Lambda
£21.01
Each
Units
5 V dc - 10A 50W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 3.9in 3.8in 1.4in 350g 80% +70°C
RS Stock No. 629-5721
Mfr. Part No.NLP40-7605J
£37.06
Each
Units
5 V dc - 8A 40W 1 90 → 264 V ac, 120 → 370 V dc Chassis Mount Open Frame 107.95mm 63.5mm 29.21mm 200g 75% +70°C
RS Stock No. 377-0869
Mfr. Part No.CA1000/24
BrandTDK-Lambda
£888.76
Each
Units
24 V dc - 40A 1kW 1 85 → 265 V ac, 120 → 360 V dc Chassis Mount Enclosed 283.5mm 175.5mm 63mm 2.6kg 75% +50°C
RS Stock No. 106-5846
Mfr. Part No.LRS-100-24
BrandMean Well
£13.65
Each
Units
24 V dc - 4.5A 108W 1 85 → 264 V ac, 120 → 373 V dc Chassis Mount Enclosed 129mm 97mm 30mm 340g 90% +70°C
RS Stock No. 466-6856
Mfr. Part No.TXL 035-0524D
BrandTRACOPOWER
£45.22
Each
Units
5 V dc, 24 V dc TXL 1.3 A, 4 A 35W 2 85 → 264V ac Chassis Mount Enclosed 109mm 82mm 35mm 300g 70 → 84% +70°C
RS Stock No. 466-6840
Mfr. Part No.TXL 035-0512D
BrandTRACOPOWER
£45.22
Each
Units
5 V dc, 12 V dc TXL 2.5 A, 4 A 35W 2 85 → 264V ac Chassis Mount Enclosed 109mm 82mm 35mm 300g 70 → 84% +70°C
RS Stock No. 408-4311
Mfr. Part No.V4FFS 24V15A
BrandTDK-Lambda
£363.59
Each
Units
24 V dc - 15A 450W 1 90 → 264 V ac, 130 → 330 V dc Chassis Mount Enclosed 268.4mm 127mm 63.5mm 2kg 75% +50°C
RS Stock No. 629-5535
Mfr. Part No.NFS110-7602PJ
£91.73
Each
Units
±12 V dc, 5.1 V dc - 3.5 A, 4.5 A, 8 A, 500 mA 80W 4 85 → 264 V ac, 120 → 370 V dc Chassis Mount Open Frame 177.8mm 107.95mm 45.72mm 600g 70% +70°C
RS Stock No. 644-8177
Mfr. Part No.SP-320-24
BrandMean Well
£74.68
Each
Units
24 V dc - 13A 312W 1 88 → 264 V ac, 124 → 370 V dc Chassis Mount Enclosed 215mm 115mm 50mm 1.1kg 87% +65°C
RS Stock No. 413-673
Mfr. Part No.RS-15-5
BrandMean Well
£9.48
Each
Units
5 V dc - 3A 15W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Enclosed 62.5mm 51mm 28mm 130g 77% +70°C
RS Stock No. 753-8026
Mfr. Part No.Nevo+600S Front End
BrandVox Power
£250.67
Each
Units
- - - 600W 4 85 → 264 V ac, 120 → 370 V dc Rack Mount Front End 129.7mm 77.7mm 41mm 600g - +85°C
RS Stock No. 680-2802
Mfr. Part No.LS100-24
BrandTDK-Lambda
£30.70
Each
Units
24 V dc - 4.5A 100W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 6.3in 3.8in 1.5in 600g 86% +70°C
RS Stock No. 833-8158
Mfr. Part No.MAP55-4003
£253.26
Each
Units
±12 V dc, ±5 V dc - 2.5 A, 6 A, 500 mA 55W 4 90 → 132 V ac, 175 → 264 V ac U Bracket U Bracket 152.4mm 83.1mm 40.6mm 550g 73 (Min.)% +70°C
RS Stock No. 813-9128
Mfr. Part No.RWS-300B-24
BrandTDK-Lambda
£114.38
Each
Units
24 V dc - 12.5A 300W 1 85 → 265 V ac, 120 → 370 V dc Chassis Mount Enclosed 41mm 102mm 170mm 900g 85 %, 88 % +70°C
RS Stock No. 621-0578
Mfr. Part No.RS-25-12
BrandMean Well
£10.81
Each
Units
12 V dc - 2.1A 25W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 78mm 51mm 28mm 200g 81.5% +70°C
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