Switch Mode Power Supply (SMPS) Transformers

Switch mode power supply (SMPS) transformers are a highly efficient form of transformer, used in devices like personal computers.

A switch mode power supply is an electronic power supply that incorporates a switching regulator to efficiently convert electrical power. Like other power supplies, an SMPS transfers power from a DC or AC source (which is often mains power) to DC loads, such as a personal computer, while converting voltage and current characteristics.

How do switch mode power supply (SMPS) transformers work?

Any switched-mode power supply that gets its power from an AC power line (also known as an 'off-line' converter) requires a transformer for galvanic isolation, which prevents current flow. Some DC-to-DC converters may also include a transformer.

SMPS transformers run at high frequency. Most of the cost savings (as well as space savings) in off-line power supplies result from the smaller size of the high-frequency transformer.

Types of switch mode power supply (SMPS) transformers

SMPS transformers have many different applications. They can be used as broadband transformers, DC-to-DC converters, low-power DC-to-DC converters, pulse transformers and power sourcing equipment, among other uses.


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Description Price Secondary Voltage Rating Primary Voltage Rating Power Rating Number of Outputs Mounting Type Application Inductance Secondary Current Termination Type Length Width Depth Dimensions Isolation Voltage
RS Stock No. 106-8858
Mfr. Part No.78601/16C
MYR6.281
Each (In a Tube of 50)
units
- - - 1 Through Hole Filtering 4mH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS Stock No. 792-4414
Mfr. Part No.47243
BrandMyrra
MYR67.02
Each
units
7 V dc, 10.5 V dc 85 → 265 V ac, 85 → 370 V dc 4W 2 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 871-1650
Mfr. Part No.B82802A0012A315
BrandEPCOS
MYR14.09
Each
units
12 (Output 3) V, 3.3 (Output 2) V, 5 (Output 1) V 36 → 60V dc 12W 3 Surface Mount DC to DC Converter, Flyback, Power Over Ethernet, Power Sourcing Equipment, Powered Devices 100µH - Gullwing 22.3mm - - 22.3 x 16.5 x 8.65mm 1500V ac
RS Stock No. 715-6961
Mfr. Part No.78601/9C
MYR6.98
Each
units
- - - 2 Through Hole Filtering 10mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 715-6999
Mfr. Part No.78615/3C
MYR6.10
Each
units
- - - 2 Through Hole Filtering 200µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 170-9245
Mfr. Part No.78615/16C
MYR6.14
Each (On a Reel of 50)
units
- - - 2 Through Hole Filtering 4mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 715-6989
Mfr. Part No.78602/8C
MYR6.22
Each
units
- - - 2 Through Hole Filtering 1mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 871-1654
Mfr. Part No.B82802A0030A220
BrandEPCOS
MYR20.90
Each
units
12 (Output 1) V, 5 (Output 2) V 36 → 60V dc 30W 2 Surface Mount DC to DC Converter, Flyback, Power Over Ethernet, Power Sourcing Equipment, Powered Devices 40µH - Gullwing 25.7mm - - 25.7 x 22 x 10.7mm 1500V ac
RS Stock No. 715-6992
Mfr. Part No.78602/16C
MYR8.17
Each
units
- - - 2 Through Hole Filtering 4mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 106-8829
Mfr. Part No.78601/4C
MYR6.14
Each (In a Tube of 50)
units
- - - 1 Through Hole Filtering 100µH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS Stock No. 792-4385
Mfr. Part No.47156
BrandMyrra
MYR62.61
Each
units
24V dc 85 → 265 V ac, 85 → 370 V dc 5W 1 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 163-3832
Mfr. Part No.749196241
MYR22.521
Each (On a Reel of 400)
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 6.6µH 950mA - 16.3mm 12mm 7.4mm 16.3 x 12 x 7.4mm 500V dc
RS Stock No. 792-4394
Mfr. Part No.47134
BrandMyrra
MYR100.98
Each
units
12V dc 85 → 265 V ac, 85 → 370 V dc 3.2W 1 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 715-6958
Mfr. Part No.78601/3C
MYR6.98
Each
units
- - - 1 Through Hole Filtering 200µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 816-4953
Mfr. Part No.760301306
MYR27.70
Each
units
80V ac 250V ac - 1 Surface Mount Flyback 1.8mH - Solder 10.5mm 10.5mm 11mm 10.5 x 10.5 x 11mm 1500 V dc, 2500 V ac
RS Stock No. 792-4417
Mfr. Part No.47244
BrandMyrra
MYR65.24
Each
units
7 V dc, 15 V dc 85 → 265 V ac, 85 → 370 V dc 4W 2 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 522-5989
Mfr. Part No.749196111
MYR19.28
Each
units
- - - 3 Surface Mount Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 27.4µH 550mA - 12.9mm 9.2mm 6.2mm 12.9 x 9.2 x 6.2mm 500V dc
RS Stock No. 106-8582
Mfr. Part No.78602/2C
MYR6.14
Each (In a Tube of 50)
units
- - - 2 Through Hole Filtering 500µH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS Stock No. 736-9987
Mfr. Part No.TGM-240NSRL
MYR18.61
Each
units
- - - 2 Surface Mount - - - - 8.13mm 7.11mm 5.08mm 8.13 x 7.11 x 5.08mm -
RS Stock No. 823-5440
Mfr. Part No.760895641
MYR72.13
Each
units
24 V - 200W 1 Through Hole - - 3.5A - 44mm 43mm 30mm 44 x 43 x 30mm 250V