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. 823-5447
Mfr. Part No.760895731
€19.63
Each
units
12V - 250W 1 Through Hole - - 5A - 48mm 46mm 27.5mm 48 x 46 x 27.5mm 250V
RS Stock No. 163-5621
Mfr. Part No.760895731
€17.848
Each (In a Tray of 15)
units
12V - 250W 1 Through Hole - 475µH 5A - 48mm 46mm 27.5mm 48 x 46 x 27.5mm 250V
RS Stock No. 163-5620
Mfr. Part No.760895641
€15.08
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. 823-5440
Mfr. Part No.760895641
€16.59
Each
units
24 V - 200W 1 Through Hole - - 3.5A - 44mm 43mm 30mm 44 x 43 x 30mm 250V
RS Stock No. 162-1317
Mfr. Part No.760895441
€14.048
Each (In a Tray of 20)
units
24V - 150W 1 Through Hole - 600µH 2A - 36mm 36mm 26mm 36 x 36 x 26mm 250V
RS Stock No. 823-5434
Mfr. Part No.760895441
€15.45
Each
units
24V - 150W 1 Through Hole - - 2A - 36mm 36mm 26mm 36 x 36 x 26mm 250V
RS Stock No. 522-6099
Mfr. Part No.749196311
€6.19
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 23.3µH 970mA - 17.5mm 16mm 8.3mm 17.5 x 16 x 8.3mm 500V dc
RS Stock No. 522-6207
Mfr. Part No.749196511
€7.75
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 22.3µH 1.7A - 21mm 21mm 10.8mm 21 x 21 x 10.8mm 500V dc
RS Stock No. 163-5623
Mfr. Part No.760895751
€17.337
Each (In a Tray of 15)
units
48V - 250W 1 Through Hole - 400µH 4.3A - 48mm 46mm 27.5mm 48 x 46 x 27.5mm 250V
RS Stock No. 144-6532
Mfr. Part No.760301104
€7.42
Each
units
- 80V dc - 1 Surface Mount Signal & Power 330µH - Solder 7mm 7mm 6mm 7 x 7 x 6mm -
RS Stock No. 522-6055
Mfr. Part No.749196221
€4.96
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 11.6µH 950mA - 16.3mm 12mm 7.4mm 16.3 x 12 x 7.4mm 500V dc
RS Stock No. 522-6128
Mfr. Part No.749196341
€5.98
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 7.9µH 970mA - 17.5mm 16mm 8.3mm 17.5 x 16 x 8.3mm 500V dc
RS Stock No. 163-3830
Mfr. Part No.749196231
€2.635
Each (On a Reel of 400)
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 8.3µH 950mA - 16.3mm 12mm 7.4mm 16.3 x 12 x 7.4mm 500V dc
RS Stock No. 522-6077
Mfr. Part No.749196241
€3.49
Each
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. 522-6190
Mfr. Part No.749196501
€3.67
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 196µH 1.7A - 21mm 21mm 10.8mm 21 x 21 x 10.8mm 500V dc
RS Stock No. 151-1284
Mfr. Part No.760301108
€2.75
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. 151-1278
Mfr. Part No.760301105
€2.76
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. 162-1318
Mfr. Part No.760895451
€14.048
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. 163-5619
Mfr. Part No.760895431
€14.048
Each (In a Tray of 20)
units
12V - 150W 1 Through Hole - 600µH 2A - 36mm 36mm 26mm 36 x 36 x 26mm 250V
RS Stock No. 522-6005
Mfr. Part No.749196131
€4.55
Each
units
- - - - - Flyback, Forward, Push-Pull, SEPIC, Step Down, Step Up 10.9µH 550mA - 12.9mm 9.2mm 6.2mm 12.9 x 9.2 x 6.2mm 500V dc