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. 816-4947
Mfr. Part No.760301303
£8.56
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. 144-6532
Mfr. Part No.760301104
£6.40
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 330µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm -
RS Stock No. 151-1273
Mfr. Part No.760301108
£5.12
Each (On a Reel of 800)
Units
- 80V dc - 1 Surface Mount Signal & Power 460µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm 1500 (Test)V
RS Stock No. 106-8858
Mfr. Part No.78601/16C
£1.137
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. 181-0913
Mfr. Part No.TRH750-21S
BrandToyogiken
£183.06
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 106-8581
Mfr. Part No.78602/1C
£1.142
Each (In a Tube of 50)
Units
- - - 2 Through Hole Filtering 2mH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS Stock No. 151-1280
Mfr. Part No.760301106
£6.17
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 370µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm 1500 (Test)V
RS Stock No. 170-9245
Mfr. Part No.78615/16C
£0.862
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. 151-1284
Mfr. Part No.760301108
£10.06
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 460µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm 1500 (Test)V
RS Stock No. 715-6986
Mfr. Part No.78602/2C
£1.26
Each
Units
- - - 2 Through Hole Filtering 500µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 181-0910
Mfr. Part No.TRH200-21S
BrandToyogiken
£76.83
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 151-1278
Mfr. Part No.760301105
£8.71
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 260µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm 1500 (Test)V
RS Stock No. 715-6983
Mfr. Part No.78602/1C
£1.19
Each
Units
- - - 2 Through Hole Filtering 2mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 151-1282
Mfr. Part No.760301107
£6.17
Each
Units
- 80V dc - 1 Surface Mount Signal & Power 650µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm 1500 (Test)V
RS Stock No. 715-6967
Mfr. Part No.78601/16C
£1.29
Each
Units
- - - 1 Through Hole Filtering 4mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS Stock No. 106-8582
Mfr. Part No.78602/2C
£1.145
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. 181-0908
Mfr. Part No.TRH2K-21S
BrandToyogiken
£389.15
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 181-0907
Mfr. Part No.TRH150-21S
BrandToyogiken
£71.20
Each
Units
- - - - - - - - Screw - - - - -
RS Stock No. 715-7018
Mfr. Part No.78615/16C
£0.97
Each
Units
- - - 2 Through Hole Filtering 4mH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV