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. 106-5820
Mfr. Part No.SBC-EN54-27V6-5A0
$156.00
Each
units
27.6 V dc - 5A 110W 200 → 240V ac 1 Chassis Mount Enclosed 124mm 122mm 49.5mm - - 560g
RS Stock No. 770-3267
Mfr. Part No.TXM 025-105
BrandTRACOPOWER
$40.52
Each
units
5 V dc - 5A 25W 90 → 264V ac 1 Chassis Mount Enclosed 79mm 51mm 29mm - - 175g
RS Stock No. 122-7653
Mfr. Part No.ECE05US48
BrandXP Power
$34.24
Each
units
48 V dc - 100mA 5W 85 → 264 V ac, 120 → 370 V dc 1 PCB Mount Encapsulated 25.4mm 25.4mm 15.24mm - - 16g
RS Stock No. 106-5846
Mfr. Part No.LRS-100-24RS
BrandMean Well
$29.11
Each
units
24 V dc - 4.5A 108W 85 → 264 V ac, 120 → 373 V dc 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
12 V dc - 5.42A 65W 90 → 264 V ac, 127 → 370 V dc 1 Chassis Mount Open Frame 101.6mm 50.8mm 29mm - - 150g
RS Stock No. 183-0098
Mfr. Part No.LPS65
$117.98
Each
units
24 V dc - 2.5A 60W 85 → 264 V ac, 120 → 300 V dc 1 Chassis Mount Open Frame 127mm 76.2mm 42.9mm - - 340g
RS Stock No. 106-5838
Mfr. Part No.LRS-75-24RS
BrandMean Well
$28.88
Each
units
24 V dc - 3.2A 76.8W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 99mm 97mm 30mm - - 300g
RS Stock No. 338-1728
Mfr. Part No.JWS300-24
BrandTDK-Lambda
$908.95
Each
units
24 V dc - 14A 336W 85 → 265 V ac, 120 → 330 V dc 1 Chassis Mount Enclosed 190mm 92mm 120mm - - 1.9kg
RS Stock No. 706-5940
Mfr. Part No.TIW 06-105
BrandTRACOPOWER
$55.22
Each
units
5 V dc - 1A 6W 93 → 264V ac 1 Surface Mount Encapsulated 50.2mm 48mm 23.6mm - - 80g
RS Stock No. 106-5869
Mfr. Part No.LRS-350-24RS
BrandMean Well
$61.63
Each
units
24 V dc - 14.6A 350W 90 → 132 V ac, 180 → 264 (By Switch) V ac, 240 → 370 V dc 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
24 V dc - 10A 240W 88 → 264 V ac, 124 → 370 V dc 1 Chassis Mount Enclosed 190mm 93mm 50mm - - 800g
RS Stock No. 449-3125
Mfr. Part No.TXL 025-24S
BrandTRACOPOWER
$73.44
Each
units
24 V dc - 1.1A 25W 85 → 264V ac 1 Chassis Mount Enclosed 93mm 51mm 28.5mm - - 190g
RS Stock No. 770-3318
Mfr. Part No.TXM 075-112
BrandTRACOPOWER
$61.26
Each
units
12 V dc - 6A 60W 90 → 264V ac 1 Chassis Mount Enclosed 129mm 99mm 38mm - - 380g
RS Stock No. 621-0663
Mfr. Part No.RS-150-12
BrandMean Well
$56.50
Each
units
12 V dc - 12.5A 150W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 1 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS Stock No. 449-3096
Mfr. Part No.TXL 025-05S
BrandTRACOPOWER
$86.66
Each
units
5 V dc - 5A 25W 85 → 264V ac 1 Chassis Mount Enclosed 93mm 51mm 28.5mm - - 190g
RS Stock No. 122-7166
Mfr. Part No.GCS250PS24
BrandXP Power
$163.36
Each
units
24 V dc - 10.4A 250W 85 → 264V ac 1 Chassis Mount Open Frame 127mm 76.2mm 36.3mm - - 290g
RS Stock No. 106-5823
Mfr. Part No.LRS-35-12RS
BrandMean Well
$23.32
Each
units
12 V dc - 3A 36W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 418-2190
Mfr. Part No.TXL 035-24S
BrandTRACOPOWER
$74.75
Each
units
24 V dc - 1.5A 35W 85 → 264 V ac, 120 → 375 V dc 1 Chassis Mount Enclosed 109mm 82mm 35mm - - 300g
RS Stock No. 434-2796
Mfr. Part No.TXL 150-12S
BrandTRACOPOWER
$180.13
Each
units
12 V dc - 12.5A 150W 85 → 264V ac 1 Chassis Mount Enclosed 211mm 99mm 50mm - - 890g
RS Stock No. 770-3282
Mfr. Part No.TXM 035-124
BrandTRACOPOWER
$44.18
Each
units
24 V dc - 1.5A 35W 90 → 264V ac 1 Chassis Mount Enclosed 102mm 64mm 33mm - - 200g
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