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. 163-3832
Mfr. Part No.749196241
kr 41,711
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. 418-4130
Mfr. Part No.74094
BrandMyrra
kr 33,20
Each
Units
3.3 → 6V ac 85 → 265V ac 3.1W 1 PCB Mount Flyback 2.1mH 1.5A - 18mm 16mm 17.5mm 18 x 16 x 17.5mm -
RS Stock No. 418-5565
Mfr. Part No.74050
BrandMyrra
kr 76,77
Each
Units
3.3 → 6.5 V ac, 9 → 16.5 V ac 85 → 265V ac 60 → 80W 4 PCB Mount Flyback 500µH 1.5 A, 3 A, 5 A - 43mm 40mm 34mm 43 x 40 x 34mm -
RS Stock No. 106-8584
Mfr. Part No.78602/16C
kr 12,409
Each (In a Tube of 50)
Units
- - - 2 Through Hole Filtering 4mH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS Stock No. 144-6532
Mfr. Part No.760301104
kr 73,98
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 330µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm -
RS Stock No. 181-0910
Mfr. Part No.TRH200-21S
BrandToyogiken
kr 945,85
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 163-5620
Mfr. Part No.760895641
kr 150,347
Each (In a Tray of 15)
Units
24V - 200W 1 Through Hole - 500µH 3.5A - 44mm 43mm 30mm 44 x 43 x 30mm 250V
RS Stock No. 162-0231
Mfr. Part No.B82802A0012A215
BrandEPCOS
kr 12,602
Each (On a Reel of 300)
Units
12 (Output 1) V, 5 (Output 2) V 36 → 60V dc 12W 2 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 1.5kV ac
RS Stock No. 715-6983
Mfr. Part No.78602/1C
kr 13,66
Each
Units
- - - 2 Through Hole Filtering 2mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 792-4388
Mfr. Part No.47114
BrandMyrra
kr 101,20
Each
Units
12V dc 85 → 265 V ac, 85 → 370 V dc 2.4W 1 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 715-6973
Mfr. Part No.78602/4C
kr 13,66
Each
Units
- - - 2 Through Hole Filtering 100µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 715-7011
Mfr. Part No.78615/9C
kr 13,66
Each
Units
- - - 2 Through Hole Filtering 10mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 871-1650
Mfr. Part No.B82802A0012A315
BrandEPCOS
kr 12,89
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
kr 13,66
Each
Units
- - - 2 Through Hole Filtering 10mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 106-8829
Mfr. Part No.78601/4C
kr 13,146
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. 522-6033
Mfr. Part No.749196201
kr 39,78
Each
Units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 140µH 950mA - 16.3mm 12mm 7.4mm 16.3 x 12 x 7.4mm 500V dc
RS Stock No. 816-4950
Mfr. Part No.760301305
kr 66,50
Each
Units
80V ac 250V - 1 Surface Mount Flyback 735µH - Solder 10.5mm 10.5mm 11mm 10.5 x 10.5 x 11mm 1500 V dc, 2500 V ac
RS Stock No. 816-4947
Mfr. Part No.760301303
kr 99,00
Each
Units
80V ac 250V - 1 Surface Mount Flyback 750µH - Solder 10.5mm 10.5mm 11mm 10.5 x 10.5 x 11mm 1500 V dc, 2500 V ac
RS Stock No. 162-0295
Mfr. Part No.B82802A0055A325
BrandEPCOS
kr 25,207
Each (On a Reel of 80)
Units
12 (Output 3) V, 3.3 (Output 2) V, 5 (Output 1) V 36 → 60V dc 55W 3 Surface Mount DC to DC Converter, Flyback, Power Over Ethernet, Power Sourcing Equipment, Powered Devices 22µH - Gullwing 32.6mm - - 32.6 x 27 x 14.8mm 1.5kV ac
RS Stock No. 871-1657
Mfr. Part No.B82802A0012A215
BrandEPCOS
kr 12,89
Each
Units
12 (Output 1) V, 5 (Output 2) V 36 → 60V dc 12W 2 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
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