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. 166-6749
Mfr. Part No.RAC04-12SC/277-E
BrandRecom
€215.32
1 Tube of 12
Tube(s)
12 V dc - 333mA 4W 1 80 → 305V ac Surface Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 78% +80°C
RS Stock No. 901-1453
Mfr. Part No.RAC03-24SE/277
BrandRecom
€16.87
Each
units
24 V dc - 125mA 3W 1 85 → 305 V ac, 120 → 430 V dc PCB Mount Encapsulated 38.25mm 24.35mm 17.4mm 28g 80% +85°C
RS Stock No. 905-8730
Mfr. Part No.RAC04-12SC/277-E
BrandRecom
€15.66
Each
units
12 V dc - 333mA 4W 1 80 → 305V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 78% +80°C
RS Stock No. 844-4013
Mfr. Part No.RAC60-12S/OF
BrandRecom
€25.84
Each
units
12 V dc - 5A 60W 1 90 → 265 V ac, 127 → 370 V dc Chassis Mount Open Frame 101.6mm 50.8mm 30mm 145g 83% +70°C
RS Stock No. 166-6461
Mfr. Part No.RAC10-05SC/277
BrandRecom
€424.02
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. 777-3433
Mfr. Part No.RAC10-05SC/277
BrandRecom
€28.06
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. 817-9808
Mfr. Part No.RAC04-12SC/230
BrandRecom
€14.20
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. 162-2674
Mfr. Part No.RAC04-12SC/230
BrandRecom
€160.80
1 Tube of 12
Tube(s)
12 V dc - 333mA 4W 1 80 → 264V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm - 77% +65°C
RS Stock No. 166-6700
Mfr. Part No.RAC03-05SE/277
BrandRecom
€185.72
1 Tube of 12
Tube(s)
5 V dc - 600mA 3W 1 85 → 305 V ac, 120 → 430 V dc Through Hole Encapsulated 38.25mm 24.35mm 17.4mm 28g 76% +85°C
RS Stock No. 901-1478
Mfr. Part No.RAC03-05SER/277
BrandRecom
€23.33
Each
units
5 V dc - 600mA 3W 1 85 → 305 V ac, 120 → 430 V dc Chassis Mount Encapsulated - 50.3mm 11mm 41g 70% +85°C
RS Stock No. 166-6701
Mfr. Part No.RAC03-24SE/277
BrandRecom
€185.72
1 Tube of 12
Tube(s)
24 V dc - 125mA 3W 1 85 → 305 V ac, 120 → 430 V dc Through Hole Encapsulated 38.25mm 24.35mm 17.4mm 28g 80% +85°C
RS Stock No. 831-7040
Mfr. Part No.RAC04-15SA/277
BrandRecom
€27.852
Each (In a Pack of 12)
units
15 V dc - 267mA 4W 1 90 → 305V PCB Mount Encapsulated 36.7mm 27mm 17.1mm 26g 76% +70°C
RS Stock No. 166-6758
Mfr. Part No.RAC02-3.3SE/277
BrandRecom
€348.97
1 Tube of 22
Tube(s)
3.3 V dc - 600mA 2W 1 85 → 305 V ac, 120 → 430 V dc Through Hole Encapsulated 33.7mm 22.2mm 17.75mm 24.5g 67% +85°C
RS Stock No. 166-6750
Mfr. Part No.RAC04-3.3SC/277-E
BrandRecom
€215.32
1 Tube of 12
Tube(s)
3.3 V dc - 1.2A 4W 1 80 → 305V ac Surface Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 72% +80°C
RS Stock No. 180-9393
Mfr. Part No.RAC3.5-24SK/277
BrandRecom
€11.18
Each
units
24 V dc RAC3.5-K/277 146mA 3.5W 1 85 → 305V ac PCB Mount Encapsulated 31.7mm 26.7mm 21.8mm 31.5g 84% +90°C
RS Stock No. 166-6759
Mfr. Part No.RAC02-12SE/277
BrandRecom
€332.43
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. 777-3409
Mfr. Part No.RAC04-05SC/277
BrandRecom
€18.63
Each
units
5 V dc - 800mA 4W 1 80 → 305V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm 31.5g 75% +80°C
RS Stock No. 901-1466
Mfr. Part No.RAC03-24SE/277/W
BrandRecom
€18.66
Each
units
24 V dc - 125mA 3W 1 85 → 305 V ac, 120 → 430 V dc Chassis Mount Encapsulated 38.25mm 24.35mm 17.4mm 29g 80% +85°C
RS Stock No. 100-2670
Mfr. Part No.RACG100-24S
BrandRecom
€66.82
Each
units
24 V dc - - 100W 1 90 → 264V ac Panel Mount Enclosed 129mm 98mm 38mm - 88% +60°C
RS Stock No. 903-9928
Mfr. Part No.RACM40-15S
BrandRecom
€73.00
Each
units
15 V dc - 2.666A 40W 1 90 → 264V ac Chassis Mount Enclosed 89mm 63.5mm 27mm 280g - +70°C