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
TWD2,717.00
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
TWD936.00
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
TWD14,092.00
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. 144-6034
Mfr. Part No.RAC04-24SGB
BrandRecom
TWD5,833.00
1 Tube of 20
Tube(s)
24 V dc - 170mA 4W 1 305 V ac, 430 V dc PCB Mount Encapsulated 37mm 24mm 15mm 20g - +85°C
RS Stock No. 165-4961
Mfr. Part No.RAC10-3.3SK/277
BrandRecom
TWD5,331.00
1 Tube of 15
Tube(s)
3.3 V dc - 2.5A 10W 1 85 → 305V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 65g 79% +80°C
RS Stock No. 165-4962
Mfr. Part No.RAC10-05SK/277
BrandRecom
TWD5,331.00
1 Tube of 15
Tube(s)
5 V dc - 2A 10W 1 85 → 305V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 65g 82% +80°C
New
RS Stock No. 210-7053
Mfr. Part No.RACM60-24SK/OF/2x4
BrandRecom
TWD781.00
Each
units
- RACM60-K/OF 2.5A 60W 1 80 → 264V ac - Open Frame - - - - - -
RS Stock No. 843-2001
Mfr. Part No.RAC04-05SC/W
BrandRecom
TWD519.00
Each
units
5 V dc - 800mA 4W 1 80 → 264 (With Derating) V ac, 115 → 370 (With Derating) V dc Through Hole Encapsulated 37.8mm 23.9mm 15.65mm 32g 72% +60°C
RS Stock No. 903-9928
Mfr. Part No.RACM40-15S
BrandRecom
TWD2,669.00
Each
units
15 V dc - 2.666A 40W 1 90 → 264V ac Chassis Mount Enclosed 89mm 63.5mm 27mm 280g - +70°C
RS Stock No. 901-1481
Mfr. Part No.RAC03-24SER/277
BrandRecom
TWD740.00
Each
units
24 V dc - 125mA 3W 1 85 → 305 V ac, 120 → 430 V dc Chassis Mount Encapsulated - 50.3mm 11mm 41g 76% +85°C
RS Stock No. 165-4963
Mfr. Part No.RAC10-12SK/277
BrandRecom
TWD5,374.00
1 Tube of 15
Tube(s)
12 V dc - 840mA 10W 1 85 → 305V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 65g 84% +80°C
RS Stock No. 166-6750
Mfr. Part No.RAC04-3.3SC/277-E
BrandRecom
TWD6,726.00
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. 706-3525
Mfr. Part No.RAC04-05SA
BrandRecom
TWD752.00
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. 183-4086
Mfr. Part No.RAC15-24SK
BrandRecom
TWD390.00
Each
units
24 V dc RAC15-K 630mA 15W 1 85 → 264V ac PCB Mount - 490mm 56mm 40mm 60g 85% +85°C
RS Stock No. 166-6746
Mfr. Part No.RAC04-15SC/230
BrandRecom
TWD6,295.00
1 Tube of 12
Tube(s)
15 V dc - 267mA 4W 1 80 → 264V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm - 78% +65°C
RS Stock No. 831-7053
Mfr. Part No.RAC04-3.3SA/277
BrandRecom
TWD941.50
Each (In a Pack of 12)
units
3.3 V dc - 1.2A 4W 1 90 → 305V PCB Mount Encapsulated 36.7mm 27mm 17.1mm 26g 68% +70°C
RS Stock No. 166-6764
Mfr. Part No.RAC02-12SC
BrandRecom
TWD9,401.00
1 Tube of 22
Tube(s)
12 V dc - 167mA 2W 1 90 → 277V ac PCB Mount Encapsulated 33.7mm 22.2mm 17.75mm 25g 74% +85°C
RS Stock No. 706-3540
Mfr. Part No.RAC20-12SB-ST
BrandRecom
TWD2,318.00
Each
units
12 V dc - 1.66A 20W 1 90 → 264V ac Chassis Mount Encapsulated 96mm 53.9mm 29.1mm 59g 82% +70°C
RS Stock No. 136-9206
Mfr. Part No.RAC150-24SG/OF
BrandRecom
TWD1,857.00
Each
units
24 V dc - 6.25A 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
TWD1,549.00
Each
units
12 V dc - 420mA 5W 1 90 → 264V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 30g 75% +70°C