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. 509-0979
Mfr. Part No.TCM 230V/12V 3VA
BrandEliwell
kr 122,69
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 823-5437
Mfr. Part No.760895451
kr 74,62
Each
Units
48V - 150W 1 Through Hole - - 2A - 36mm 36mm 26mm 36 x 36 x 26mm 250V
RS Stock No. 162-1318
Mfr. Part No.760895451
kr 73,408
Each (In a Tray of 20)
Units
48V - 150W 1 Through Hole - 600µH 2A - 36mm 36mm 26mm 36 x 36 x 26mm 250V
RS Stock No. 774-8213
BrandRS PRO
kr 265,84
Each
Units
- - 12W 1 Encapsulated - - - - 50mm 48mm 40mm - -
RS Stock No. 418-5515
Mfr. Part No.74010
BrandMyrra
kr 48,85
Each
Units
4 → 7 V ac, 8 → 17 V ac 85 → 265V ac 7 → 10W 2 Through Hole Flyback - 2 A, 850 mA Pin 18mm 17.5mm 16mm 18 x 17.5 x 16mm -
RS Stock No. 163-3821
Mfr. Part No.749196101
kr 34,997
Each (On a Reel of 500)
Units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 198.6µH 550mA - 12.9mm 9.2mm 6.2mm 12.9 x 9.2 x 6.2mm 500V dc
RS Stock No. 792-4360
Mfr. Part No.47152
BrandMyrra
kr 183,15
Each
Units
5V 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. 792-4382
Mfr. Part No.47132
BrandMyrra
kr 61,32
Each
Units
5V dc 85 → 265 V ac, 85 → 370 V dc 2.5W 1 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 522-5973
Mfr. Part No.749196101
kr 33,50
Each
Units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 198.6µH 550mA - 12.9mm 9.2mm 6.2mm 12.9 x 9.2 x 6.2mm 500V dc
RS Stock No. 792-4433
Mfr. Part No.47257
BrandMyrra
kr 194,02
Each
Units
5 V dc, 12 V dc 85 → 265 V ac, 85 → 370 V dc 5W 2 Through Hole - - - - 31.7mm 26.7mm 21.8mm 31.7 x 26.7 x 21.8mm -
RS Stock No. 792-4385
Mfr. Part No.47156
BrandMyrra
kr 188,13
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. 792-4420
Mfr. Part No.47246
BrandMyrra
kr 194,22
Each
Units
5 V dc, 12 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. 841-6762
Mfr. Part No.B78304B1030A003
BrandEPCOS
kr 60,02
Each
Units
- - - 1 Surface Mount Broadband Transformers, Drive Transformers for Power Semiconductors, Low-power DC/DC Converters, Pulse Transformers 100nH - Gullwing 8mm 7mm 5.4mm 8 x 7 x 5.4mm -
RS Stock No. 841-6765
Mfr. Part No.B78304B1031A003
BrandEPCOS
kr 60,02
Each
Units
- - - 1 Surface Mount Broadband Transformers, Drive Transformers for Power Semiconductors, Low-power DC/DC Converters, Pulse Transformers 1µH - Gullwing 8mm 7mm 5.4mm 8 x 7 x 5.4mm -
RS Stock No. 715-6936
Mfr. Part No.77202C
kr 61,22
Each
Units
- - - - Through Hole TRIAC Firing - - Pin 25.4mm 20.3mm 12.3mm 25.4 x 20.3 x 12.3mm -
RS Stock No. 181-0906
Mfr. Part No.TRH100-21S
BrandToyogiken
kr 754,13
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 163-3826
Mfr. Part No.749196141
kr 28,888
Each (On a Reel of 500)
Units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 8.5µH 550mA - 12.9mm 9.2mm 6.2mm 12.9 x 9.2 x 6.2mm 500V dc
RS Stock No. 106-8858
Mfr. Part No.78601/16C
kr 9,192
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. 715-7018
Mfr. Part No.78615/16C
kr 13,96
Each
Units
- - - 2 Through Hole Filtering 4mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 162-0231
Mfr. Part No.B82802A0012A215
BrandEPCOS
kr 12,555
Each (On a Reel of 300)
Units
5 (Output 2) V, 12 (Output 1) 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
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