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. 675-5100
Mfr. Part No.RAC30-24SA
BrandRecom
TWD2,253.00
Each
units
24 V dc - 1.25A 30W 1 90 → 264V ac PCB Mount Encapsulated 89mm 63.5mm 25mm 212g 82% +70°C
RS Stock No. 777-3433
Mfr. Part No.RAC10-05SC/277
BrandRecom
TWD855.00
Each
units
5 V dc - 2A 10W 1 80 → 305V ac PCB Mount Encapsulated 52.4mm 27.4mm 23.5mm 62g 78% +75°C
RS Stock No. 166-6461
Mfr. Part No.RAC10-05SC/277
BrandRecom
TWD12,882.00
1 Tube of 16
Tube(s)
5 V dc - 2A 10W 1 80 → 305V ac PCB Mount Encapsulated 52.4mm 27.4mm 23.5mm 62g 78% +75°C
New
RS Stock No. 210-7050
Mfr. Part No.RACM40-24SK/OF
BrandRecom
TWD656.00
Each
units
- RACM40-K/OF 1.667A 40W 1 80 → 264V ac - Open Frame - - - - - -
RS Stock No. 817-9808
Mfr. Part No.RAC04-12SC/230
BrandRecom
TWD541.00
Each
units
12 V dc - 333mA 4W 1 80 → 264V ac Through Hole Encapsulated 36.7mm 27.2mm 17.1mm - 77% +65°C
RS Stock No. 706-3522
Mfr. Part No.RAC04-24SA
BrandRecom
TWD738.00
Each
units
24 V dc - 167mA 4W 1 90 → 264 V ac, 90 → 305 V ac PCB Mount Encapsulated 36.7mm 27mm 17.1mm 26g 77% +70°C
RS Stock No. 190-7732
Mfr. Part No.RAC03-3.3SK
BrandRecom
TWD215.00
Each
units
3.3 V dc RAC03‿K 900mA 3W 1 85 → 264V ac PCB Mount - 28.5mm 23.5mm 17.9mm 20g 69 (Typ.)% +80°C
New
RS Stock No. 210-7051
Mfr. Part No.RACM40-48SK/OF
BrandRecom
TWD640.00
Each
units
- RACM40-K/OF 0.833A 40W 1 80 → 264V ac - Open Frame - - - - - -
RS Stock No. 166-6744
Mfr. Part No.RAC04-24SC/230
BrandRecom
TWD6,295.00
1 Tube of 12
Tube(s)
24 V dc - 167mA 4W 1 80 → 264V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm - 79% +65°C
RS Stock No. 136-9196
Mfr. Part No.RAC35-05SG/OF
BrandRecom
TWD564.00
Each
units
5 V dc - 6A 36W 1 90 → 264V ac Surface Mount Open Frame 101.6mm 51mm 28mm 126g 78% +65°C
New
RS Stock No. 210-7486
Mfr. Part No.RACM40-48SK-T
BrandRecom
TWD748.00
Each
units
48 V RACM40 833mA 40W 1 80 → 264V ac - Encapsulated - - - - - -
RS Stock No. 190-7734
Mfr. Part No.RAC03-05SK
BrandRecom
TWD223.00
Each
units
5 V dc RAC03‿K 600mA 3W 1 85 → 264V ac PCB Mount - 28.5mm 23.5mm 17.9mm 20g 74 (Typ.)% +80°C
RS Stock No. 811-7342
Mfr. Part No.RAC06-12SC/W
BrandRecom
TWD700.00
Each
units
12 V dc - 500mA 6W 1 80 → 264V ac Through Hole Encapsulated 50.9mm 25.5mm 16.4mm 35g 78% +55°C
RS Stock No. 843-2004
Mfr. Part No.RAC04-09SC/W
BrandRecom
TWD491.00
Each
units
9 V dc - 444mA 4W 1 80 → 264 (With Derating) V ac, 115 → 370 (With Derating) V dc Through Hole Encapsulated 37.8mm 23.9mm 15.65mm 32g 76% +60°C
RS Stock No. 144-6302
Mfr. Part No.RAC03-24SGB
BrandRecom
TWD288.00
Each
units
24 V dc - 130mA 3W 1 305 V ac, 430 V dc PCB Mount Encapsulated 37mm 24mm 15mm 20g 80% +70°C
RS Stock No. 144-6308
Mfr. Part No.RAC05-15SK
BrandRecom
TWD320.00
Each
units
15 V dc - 333mA 5W 1 85 → 264V ac PCB Mount Encapsulated 25.4mm 25.4mm 16.5mm - 82% +50°C
RS Stock No. 139-2836
Mfr. Part No.RAC02-05SGA
BrandRecom
TWD4,358.00
1 Tube of 20
Tube(s)
5 V dc - 400mA 2W 1 100 → 240V ac PCB Mount Encapsulated 33.7mm 22.2mm 19mm 12g 69% +70°C
RS Stock No. 136-9208
Mfr. Part No.RAC150-12SG/ENC
BrandRecom
TWD2,091.00
Each
units
12 V dc - 12.5A 150W 1 90 → 264V ac Chassis Mount, Panel Mount Enclosed 105mm 62mm 35mm 265g 91% +70°C
RS Stock No. 706-3525
Mfr. Part No.RAC04-05SA
BrandRecom
TWD738.00
Each
units
5 V dc - 800mA 4W 1 90 → 264 V ac, 90 → 305 V ac PCB Mount Encapsulated 36.7mm 27mm 17.1mm 26g 72% +70°C
RS Stock No. 183-4083
Mfr. Part No.RAC15-15SK
BrandRecom
TWD383.00
Each
units
15 V dc RAC15-K 1A 15W 1 85 → 264V ac PCB Mount - 490mm 56mm 40mm 60g 86% +85°C