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. 174-8155
Mfr. Part No.UHP-500-24
BrandMean Well
£88.49
Each
Units
24V dc - 20.9A 501.6W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Enclosed 232mm 81mm 31mm 905g 94.5% +70°C
New
RS Stock No. 203-5335
Mfr. Part No.OZP-200-5-JSE-K
BrandNipron
£115.76
Each
Units
5V OZP-200-E 40A 200W 1 85 → 264V ac - Enclosed - - - - - -
RS Stock No. 185-6161
Mfr. Part No.CUS200LD-12
BrandTDK-Lambda
£62.18
Each
Units
12V dc CUS200LD 10 A, 12.5 A 120 (Convection) W, 150 (Conduction) W 1 85 → 265V ac - Enclosed 160mm 62mm 31mm 430g 89% +70°C
RS Stock No. 131-1366
Mfr. Part No.LEB100F-0512-SNY
BrandCosel
£103.83
Each
Units
5 V dc, 12 V dc - 5A 100W 2 120 → 370 V dc, 85 → 264 V ac Chassis Mount Enclosed 252mm 85mm 46mm 690g 76% +70°C
RS Stock No. 133-6531
Mfr. Part No.CNS653-ME
£178.73
Each
Units
12V dc - 54.2A 400W 1 90 → 264V ac Chassis Mount Encapsulated 182.6mm 101.6mm 40mm 1kg - +80°C
RS Stock No. 177-8074
Mfr. Part No.TPP 65-105A-J
BrandTRACOPOWER
£48.04
Each
Units
5V dc - 10A 65W 1 120 → 370 V dc, 85 → 264 V ac Chassis Mount Open Frame 76.2mm 50.8mm 24mm 114g - +85°C
RS Stock No. 122-7692
Mfr. Part No.ECE60US36
BrandXP Power
£64.32
Each
Units
36V dc - 1.67A 60W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 91.4mm 38.1mm 28mm 191g 88% +70°C
RS Stock No. 132-7448
Mfr. Part No.PMA100F-12-N
BrandCosel
£109.88
Each
Units
12V dc - 8.5A 102W 1 85 → 264V ac Panel Mount Enclosed 34mm 168mm 93mm 625g - +70°C
RS Stock No. 183-9445
Mfr. Part No.CUS100ME-18/U
BrandTDK-Lambda
£56.67
Each
Units
18V dc CUS100ME 5.55A 100W 1 85 → 264V ac Chassis Mount U Bracket 116mm 64mm 38.5mm 240g 94% +85°C
RS Stock No. 146-3196
Mfr. Part No.KAS4-3P3
BrandTDK-Lambda
£16.07
Each
Units
3.3V dc - 1.2A 4W 1 120 → 430 V dc, 90 → 305 V ac PCB Mount Enclosed 37mm 27.5mm 17.5mm 26g 68% +70°C
RS Stock No. 174-8055
Mfr. Part No.MPM-10-12
BrandMean Well
£9.61
Each
Units
12V dc - 850mA 10.2W 1 80 → 264V ac PCB Mount Encapsulated 45.7mm 25.4mm 21.5mm 35g - +85°C
RS Stock No. 172-0765
Mfr. Part No.GCU500PS24
BrandXP Power
£139.88
Each
Units
24V dc - 10.4 A, 20.8 A 500W 1 80 → 264V ac Chassis Mount U Bracket 165.1mm 83.8mm 39.4mm 612g 92% 70°C
RS Stock No. 146-9346
Mfr. Part No.XMS50070
BrandTDK-Lambda
£314.70
Each
Units
24V dc - 20.8A 500W 1 90 → 264V ac Chassis Mount Open Frame 180mm 102mm 37mm - - -
RS Stock No. 174-8060
Mfr. Part No.MPM-15-12
BrandMean Well
£10.55
Each
Units
12V dc - 1.25A 15W 1 80 → 264V ac PCB Mount Encapsulated 52.4mm 27.2mm 24mm 56g - +85°C
RS Stock No. 166-6719
Mfr. Part No.RAC06-24SC
BrandRecom
£154.20
1 Tube of 10
Tube(s)
24V dc - 250mA 6W 1 90 → 264V ac PCB Mount Encapsulated 53.5mm 25.5mm 15.6mm 35g 80% +80°C
RS Stock No. 181-0588
Mfr. Part No.TMPS 10-103
BrandTRACOPOWER
£11.96
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 172-0770
Mfr. Part No.GCU500PS48-EF
BrandXP Power
£149.04
Each
Units
48V dc - 5.2 A, 10.4 A 500W 1 80 → 264V ac Chassis Mount U Bracket 209.4mm 83.8mm 41.8mm 748g 92% 70°C
RS Stock No. 764-6975
Mfr. Part No.EPS-25-7.5
BrandMean Well
£9.85
Each
Units
7.5V dc - 3.4A 25.5W 1 120 → 370 V dc, 85 → 264 V ac Chassis Mount Open Frame 76.2mm 50.8mm 24mm 81g 83% +70°C
RS Stock No. 180-9386
Mfr. Part No.RAC05-15SK/277/W
BrandRecom
£8.28
Each
Units
15V dc RAC05-K/277 330mA 5W 1 85 → 305V ac PCB Mount Encapsulated 31.7mm 26.7mm 21.8mm 37g 83% +80°C
RS Stock No. 183-9420
Mfr. Part No.QS5H-1200-48
BrandTDK-Lambda
£352.30
Each
Units
48V dc QS 25A 1.2kW 1 90 → 264V ac Chassis Mount Enclosed 270mm 127mm 63.3mm - 91% +70°C
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