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
TWD2,103.00
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
TWD813.00
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
TWD12,468.00
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
RS Stock No. 165-5098
Mfr. Part No.RAC10-15DK/277
BrandRecom
TWD341.00
Each
units
±15 V dc - ±340mA 10W 2 85 → 305V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 65g 83% +80°C
RS Stock No. 193-238
Mfr. Part No.RAC10-24SB
BrandRecom
TWD1,467.00
Each
units
24 V dc - 417mA 10W 1 90 → 264V ac PCB Mount Encapsulated 52.4mm 26.8mm 23.5mm 51g 80% +70°C
RS Stock No. 843-1998
Mfr. Part No.RAC04-3.3SC/W
BrandRecom
TWD520.00
Each
units
3.3 V dc - 1.2A 4W 1 80 → 264 (With Derating) V ac, 115 → 370 (With Derating) V dc Through Hole Encapsulated 37.8mm 23.9mm 15.65mm 32g 67% +60°C
RS Stock No. 804-6146
Mfr. Part No.RAC40-12SB-ST
BrandRecom
TWD3,101.00
Each
units
12 V dc - 3.333A 40W 1 90 → 264 V ac, 100 → 375 V ac Through Hole Encapsulated 111.9mm 63.7mm 32.5mm 300g 84% +70°C
RS Stock No. 144-6031
Mfr. Part No.RAC04-05SGB
BrandRecom
TWD5,988.00
1 Tube of 20
Tube(s)
5 V dc - 800mA 4W 1 305 V ac, 430 V dc PCB Mount Encapsulated 37mm 24mm 15mm 20g - +85°C
RS Stock No. 136-9205
Mfr. Part No.RAC150-12SG/OF
BrandRecom
TWD1,821.00
Each
units
12 V dc - 12.5A 150W 1 90 → 264V ac Surface Mount Open Frame 101.6mm 50.8mm 30mm 200g 91% +70°C
RS Stock No. 193-323
Mfr. Part No.RAC05-12SB
BrandRecom
TWD1,546.00
Each
units
12 V dc - 420mA 5W 1 90 → 264V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 30g 75% +70°C
RS Stock No. 144-6318
Mfr. Part No.RAC03-05SGA
BrandRecom
TWD274.00
Each
units
5 V dc - 600mA 3W 1 305 V ac, 430 V dc PCB Mount Encapsulated 37mm 24mm 15mm 20g 72% +70°C
RS Stock No. 903-9919
Mfr. Part No.RACM40-12S
BrandRecom
TWD2,619.00
Each
units
12 V dc - 3.333A 40W 1 90 → 264V ac Chassis Mount Enclosed 89mm 63.5mm 27mm 280g - +70°C
RS Stock No. 100-2672
Mfr. Part No.RACG150-24S
BrandRecom
TWD2,352.00
Each
units
24 V dc - - 150W 1 90 → 264V ac Panel Mount Enclosed 160mm 98mm 38mm - 88% +70°C
RS Stock No. 166-6759
Mfr. Part No.RAC02-12SE/277
BrandRecom
TWD9,149.00
1 Tube of 22
Tube(s)
12 V dc - 167mA 2W 1 85 → 305 V ac, 120 → 430 V dc Through Hole Encapsulated 33.7mm 22.2mm 17.75mm 24.5g 73% +85°C
RS Stock No. 166-6753
Mfr. Part No.RAC04-0512DC/277-E
BrandRecom
TWD6,827.00
1 Tube of 12
Tube(s)
5 V dc, 12 V dc - 33 mA, 720 mA 4W 1 80 → 305V ac Surface Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 75% +80°C
RS Stock No. 144-6016
Mfr. Part No.RAC05-12SK
BrandRecom
TWD5,425.00
1 Tube of 18
Tube(s)
12 V dc - 420mA 5W 1 80 → 264 V ac, 115 → 370 V dc Through Hole Encapsulated 50.9mm 25.5mm 15.65mm - 76 (Typ.)% +55 (without Derating) °C, +75 (with Derating) °C
RS Stock No. 905-8742
Mfr. Part No.RAC04-24SC/277-E
BrandRecom
TWD579.00
Each
units
24 V dc - 167mA 4W 1 80 → 305V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 79% +80°C
RS Stock No. 903-9921
Mfr. Part No.RACM40-24S
BrandRecom
TWD2,596.00
Each
units
24 V dc - 1.67A 40W 1 90 → 264V ac Chassis Mount Enclosed 89mm 63.5mm 27mm 280g - +70°C
RS Stock No. 139-2957
Mfr. Part No.RAC01-05SGA
BrandRecom
TWD211.00
Each
units
5 V dc - 200mA 1W 1 100 → 240V ac PCB Mount Encapsulated 33.7mm 22.2mm 19mm 12g 63% +70°C
RS Stock No. 166-6717
Mfr. Part No.RAC06-12DC
BrandRecom
TWD6,291.00
1 Tube of 9
Tube(s)
±12 V dc - ±250mA 6W 2 90 → 264V ac PCB Mount Encapsulated 53.5mm 25.5mm 15.6mm 35g 78% +80°C