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. 106-5846
Mfr. Part No.LRS-100-24RS
BrandMean Well
$29.11
Each
units
24V dc - 4.5A 108W 120 → 373 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS Stock No. 103-4699
Mfr. Part No.EPS-65S-12
BrandMean Well
$38.45
Each
units
12V dc - 5.42A 65W 127 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 29mm - - 150g
RS Stock No. 106-5838
Mfr. Part No.LRS-75-24RS
BrandMean Well
$28.88
Each
units
24V dc - 3.2A 76.8W 120 → 373 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 99mm 97mm 30mm - - 300g
RS Stock No. 106-5869
Mfr. Part No.LRS-350-24RS
BrandMean Well
$61.63
Each
units
24V dc - 14.6A 350W 180 → 264 (By Switch) V ac, 240 → 370 V dc, 90 → 132 V ac 1 Chassis Mount Enclosed 215mm 115mm 30mm - - 760g
RS Stock No. 705-9835
Mfr. Part No.SP-240-24RS
BrandMean Well
$189.79
Each
units
24V dc - 10A 240W 124 → 370 V dc, 88 → 264 V ac 1 Chassis Mount Enclosed 190mm 93mm 50mm - - 800g
RS Stock No. 621-0663
Mfr. Part No.RS-150-12
BrandMean Well
$56.50
Each
units
12V dc - 12.5A 150W 176 → 264 V ac, 248 → 373 V dc, 88 → 132 V ac 1 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS Stock No. 106-5823
Mfr. Part No.LRS-35-12RS
BrandMean Well
$23.32
Each
units
12V dc - 3A 36W 120 → 373 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 705-9822
Mfr. Part No.SP-240-12RS
BrandMean Well
$189.79
Each
units
12V dc - 20A 240W 124 → 370 V dc, 88 → 264 V ac 1 Chassis Mount Enclosed 190mm 93mm 50mm - - 800g
RS Stock No. 106-5886
Mfr. Part No.HEP-185-24A
BrandMean Well
$239.73
Each
units
24V dc - 7.8A 187W 127 → 431 V dc, 90 → 305 V ac 1 Chassis Mount Enclosed 228mm 68mm 38.8mm - - 1.2kg
RS Stock No. 130-748
Mfr. Part No.PS-35-24
BrandMean Well
$29.63
Each
units
24V dc - 1.5A 36W 127 → 370 V dc, 90 → 264 V ac 1 Chassis Mount Open Frame 101.6mm 50.8mm 24mm - - 124g
RS Stock No. 770-4049
Mfr. Part No.RSP-320-5RS
BrandMean Well
$129.23
Each
units
5V dc - 60A 300W 124 → 370 V dc, 88 → 264 V ac 1 Chassis Mount Enclosed 215mm 115mm 30mm - - 900g
RS Stock No. 621-0679
Mfr. Part No.RS-100-24
BrandMean Well
$52.72
Each
units
24V dc - 4.5A 108W 125 → 373 V dc, 88 → 264 V ac 1 Chassis Mount Enclosed 159mm 97mm 38mm - - 600g
RS Stock No. 106-5830
Mfr. Part No.LRS-50-12RS
BrandMean Well
$24.99
Each
units
12V dc - 4.2A 50W 120 → 373 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 413-605
Mfr. Part No.RS-15-24
BrandMean Well
$20.22
Each
units
24V dc - 625mA 15W 120 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 62.5mm 51mm 28mm - - 130g
RS Stock No. 705-9769
Mfr. Part No.HRPG-300-5RS
BrandMean Well
$423.41
Each
units
5V dc - 60A 300W 120 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 199mm 105mm 41mm - - 950g
RS Stock No. 740-5001
Mfr. Part No.SCP-75-12RS
BrandMean Well
$51.52
Each
units
13.8V dc - 5.4A 74.5W 120 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 159mm 97mm 38mm - - 500g
RS Stock No. 644-8060
Mfr. Part No.RD-125B
BrandMean Well
$71.47
Each
units
5/24V dc - 4.6A 133W 176 → 264 V ac, 248 → 373 V dc, 88 → 132 V ac 2 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS Stock No. 106-5872
Mfr. Part No.HEP-100-12A
BrandMean Well
$221.64
Each
units
12V dc - 8.34A 100W 127 → 431 V dc, 90 → 305 V ac 1 Chassis Mount Enclosed 220mm 68mm 38.8mm - - 1.1kg
RS Stock No. 106-5825
Mfr. Part No.LRS-35-24RS
BrandMean Well
$22.19
Each
units
24V dc - 1.5A 36W 120 → 373 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 815-7410
Mfr. Part No.RSP-75-13.5RS
BrandMean Well
$117.64
Each
units
13.5V dc - 5.6A 75.6W 120 → 370 V dc, 85 → 264 V ac 1 Chassis Mount Enclosed 159mm 97mm 30mm - - 440g