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. 122-7686
Mfr. Part No.ECE60US12
BrandXP Power
£64.32
Each
Units
12V dc - 5A 60W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 91.4mm 38.1mm 28mm 191g 87% +70°C
RS Stock No. 172-0781
Mfr. Part No.UCP180PS12
BrandXP Power
£80.35
Each
Units
12V dc - 10 A, 15 A 180W 1 85 → 264V ac Chassis Mount U Bracket 107.6mm 62.8mm 29.5mm 240g 92% 70°C
RS Stock No. 193-323
Mfr. Part No.RAC05-12SB
BrandRecom
£34.39
Each
Units
12V dc - 420mA 5W 1 90 → 264V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 30g 75% +70°C
RS Stock No. 144-6032
Mfr. Part No.RAC04-12SGB
BrandRecom
£142.60
1 Tube of 20
Tube(s)
12V dc - 330mA 4W 1 305 V ac, 430 V dc PCB Mount Encapsulated 37mm 24mm 15mm 20g - +85°C
RS Stock No. 200-6346
Mfr. Part No.LCE80PS30
BrandXP Power
£33.55
Each
Units
30V LCE80 2.67A 80W 1 115/230V ac - Open Frame - - - - - -
RS Stock No. 132-7444
Mfr. Part No.PMA60F-5-N
BrandCosel
£85.68
Each
Units
5V dc - 12A 60W 1 85 → 264V ac Panel Mount Enclosed 32mm 135mm 82mm 395g - +70°C
RS Stock No. 174-8158
Mfr. Part No.UHP-500R-4.2
BrandMean Well
£96.90
Each
Units
4.2V dc - 80A 336W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Enclosed 232mm 81mm 31mm 905g 89% +70°C
RS Stock No. 131-1769
Mfr. Part No.LFP100F-48-SNY
BrandCosel
£65.65
Each
Units
48V dc - 2.1A 100.8W 1 85 → 264V ac Chassis Mount Enclosed 185mm 72mm 45mm 480g 87% +70°C
RS Stock No. 787-8917
Mfr. Part No.NPS64-M
£19.15
Each
Units
15V dc - 4A 60W 1 127 → 300 V dc, 90 → 264 V ac Chassis Mount Open Frame 101.6mm 50.8mm 32.1mm 118g - +50°C
RS Stock No. 134-9079
Mfr. Part No.ECF40US24
BrandXP Power
£18.00
Each
Units
24V dc - 1.67A 40W 1 80 → 264V ac Chassis Mount Open Frame 76.2mm 38.1mm 28.14mm 69g - +70°C
RS Stock No. 828-8429
Mfr. Part No.PBA100F-24-TN
BrandCosel
£89.76
Each
Units
24V dc - 4.5A 108W 1 85 → 264V ac Chassis Mount Enclosed 160.5mm 93.5mm 35.5mm 440g 86% +71°C
RS Stock No. 146-9339
Mfr. Part No.CSS65A-19
BrandTDK-Lambda
£44.64
Each
Units
19V dc - 3.43A 65W 1 90 → 264V ac Chassis Mount Open Frame 101.6mm 50.8mm 27.5mm 136g - +70°C
RS Stock No. 664-5148
Mfr. Part No.VS75E-15
BrandTDK-Lambda
£22.12
Each
Units
15V dc - 5A 75W 1 85 → 132V ac Chassis Mount Open Frame 150mm 50mm 29mm 200g 85% +70°C
RS Stock No. 136-8825
Mfr. Part No.ULP40-1324
BrandEOS
£14.70
Each
Units
24V dc - 1.67A 40W 1 264 V ac, 390 V dc Surface Mount Open Frame 76.2mm 50.8mm 16.76mm 100g 85% +70°C
New
RS Stock No. 209-9164
Mfr. Part No.RSIW 12V12W
BrandTRACOPOWER
£30.83
Each
Units
- RSIW 1A 12W 1 90 → 264V ac - Encapsulated - - - - - -
RS Stock No. 157-8370
Mfr. Part No.TPP 15-112A-J
BrandTRACOPOWER
£25.39
Each
Units
12V dc - 1.25A 15W 1 120 → 370 V dc, 85 → 264 V ac Chassis Mount Open Frame 66.2mm 25.4mm 15.7mm 19g - +85°C
RS Stock No. 183-9448
Mfr. Part No.CUS100ME-24/U
BrandTDK-Lambda
£46.44
Each
Units
24V dc CUS100ME 4.16A 100W 1 85 → 264V ac Chassis Mount U Bracket 116mm 64mm 38.5mm 240g 94% +85°C
RS Stock No. 132-7443
Mfr. Part No.PMA30F-24-N
BrandCosel
£35.01
Each
Units
24V dc - 1.3A 31W 1 85 → 264V ac Panel Mount Enclosed 31mm 120mm 82mm 280g - +70°C
RS Stock No. 174-8157
Mfr. Part No.UHP-500-48
BrandMean Well
£88.49
Each
Units
48V dc - 10.45A 501.6W 1 127 → 370 V dc, 90 → 264 V ac Chassis Mount Enclosed 232mm 81mm 31mm 905g 95% +70°C
RS Stock No. 134-9078
Mfr. Part No.ECF40US18
BrandXP Power
£18.00
Each
Units
18V dc - 2.23A 40W 1 80 → 264V ac Chassis Mount Open Frame 76.2mm 38.1mm 28.14mm 69g - +70°C
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