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. 162-0295
Mfr. Part No.B82802A0055A325
BrandEPCOS
$6.034
Each (On a Reel of 80)
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) 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
$4.52
Each
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 1500V ac
RS Stock No. 871-1650
Mfr. Part No.B82802A0012A315
BrandEPCOS
$5.18
Each
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) 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. 841-6765
Mfr. Part No.B78304B1031A003
BrandEPCOS
$6.30
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. 171-1196
Mfr. Part No.B82802A0012A315
BrandEPCOS
$5.157
Each (On a Reel of 300)
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) 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 1.5kV ac
RS Stock No. 162-0296
Mfr. Part No.B82802A0055A225
BrandEPCOS
$6.034
Each (On a Reel of 80)
units
5 (Output 2) V, 12 (Output 1) V 30 → 60V ac 55W 2 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. 871-1666
Mfr. Part No.B82802A0055A225
BrandEPCOS
$9.77
Each
units
5 (Output 2) V, 12 (Output 1) V 30 → 60V ac 55W 2 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 1500V ac
RS Stock No. 162-0281
Mfr. Part No.B78304B1031A003
BrandEPCOS
$5.531
Each (On a Reel of 900)
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. 162-0231
Mfr. Part No.B82802A0012A215
BrandEPCOS
$3.017
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
RS Stock No. 871-1660
Mfr. Part No.B82802A0055A325
BrandEPCOS
$7.76
Each
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) 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 1500V ac
RS Stock No. 871-1654
Mfr. Part No.B82802A0030A220
BrandEPCOS
$6.81
Each
units
5 (Output 2) V, 12 (Output 1) 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. 167-0209
Mfr. Part No.B78304B1030A003
BrandEPCOS
$9.454
Each (On a Reel of 900)
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. 162-0279
Mfr. Part No.B82802A0030A220
BrandEPCOS
$4.022
Each (On a Reel of 160)
units
5 (Output 2) V, 12 (Output 1) 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 1.5kV ac
RS Stock No. 841-6762
Mfr. Part No.B78304B1030A003
BrandEPCOS
$7.31
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. 162-0280
Mfr. Part No.B82802A0030A320
BrandEPCOS
$4.022
Each (On a Reel of 160)
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) V 36 → 60V dc 30W 3 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 1.5kV ac
RS Stock No. 871-1663
Mfr. Part No.B82802A0030A320
BrandEPCOS
$6.55
Each
units
3.3 (Output 2) V, 5 (Output 1) V, 12 (Output 3) V 36 → 60V dc 30W 3 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