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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Omschrijving Prijs 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-stocknr. 418-5515
Fabrikantnummer74010
FabrikantMyrra
4,90 €
Each
Aantal stuks
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-stocknr. 871-1654
FabrikantnummerB82802A0030A220
FabrikantEPCOS
1,76 €
Each
Aantal stuks
12 (Output 1) V, 5 (Output 2) 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-stocknr. 509-0979
FabrikantnummerTCM 230V/12V 3VA
FabrikantEliwell
12,56 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 162-0279
FabrikantnummerB82802A0030A220
FabrikantEPCOS
1,717 €
Each (On a Reel of 160)
Aantal stuks
12 (Output 1) V, 5 (Output 2) 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-stocknr. 715-6933
Fabrikantnummer77205C
6,14 €
Each
Aantal stuks
- - - - Through Hole TRIAC Firing - - Pin 25.4mm 20.3mm 12.3mm 25.4 x 20.3 x 12.3mm -
RS-stocknr. 715-6936
Fabrikantnummer77202C
5,87 €
Each
Aantal stuks
- - - - Through Hole TRIAC Firing - - Pin 25.4mm 20.3mm 12.3mm 25.4 x 20.3 x 12.3mm -
RS-stocknr. 715-6945
Fabrikantnummer77209C
6,14 €
Each
Aantal stuks
- - - 2 Through Hole TRIAC Firing - - Pin 25.4mm 20.3mm 12.3mm 25.4 x 20.3 x 12.3mm -
RS-stocknr. 792-4372
Fabrikantnummer47154
FabrikantMyrra
18,87 €
Each
Aantal stuks
12V 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-stocknr. 715-6958
Fabrikantnummer78601/3C
1,32 €
Each
Aantal stuks
- - - 1 Through Hole Filtering 200µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS-stocknr. 162-0281
FabrikantnummerB78304B1031A003
FabrikantEPCOS
2,596 €
Each (On a Reel of 900)
Aantal stuks
- - - 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-stocknr. 792-4376
Fabrikantnummer47155
FabrikantMyrra
19,38 €
Each
Aantal stuks
15V 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-stocknr. 106-8855
Fabrikantnummer78601/1C
1,245 €
Each (In a Tube of 50)
Aantal stuks
- - - 1 Through Hole Filtering 2mH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
RS-stocknr. 715-6939
Fabrikantnummer77204C
5,87 €
Each
Aantal stuks
- - - - Through Hole TRIAC Firing - - Pin 25.4mm 20.3mm 12.3mm 25.4 x 20.3 x 12.3mm -
RS-stocknr. 715-6973
Fabrikantnummer78602/4C
1,37 €
Each
Aantal stuks
- - - 2 Through Hole Filtering 100µH - Pin 9.52mm 9mm 6.35mm 9.52 x 9 x 6.35mm 1kV
RS-stocknr. 162-1312
Fabrikantnummer760895631
FabrikantWurth Elektronik
14,364 €
Each (In a Tray of 20)
Aantal stuks
12V - 200W 1 Through Hole - 500µH 3.5A - 44mm 43mm 30mm 44 x 43 x 30mm 250V
RS-stocknr. 792-4354
Fabrikantnummer47125
FabrikantMyrra
16,01 €
Each
Aantal stuks
15V 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-stocknr. 418-5537
Fabrikantnummer74020
FabrikantMyrra
3,80 €
Each
Aantal stuks
10 → 17 V ac, 4 → 7 V ac 85 → 265V ac 10 → 16W 2 Through Hole Flyback - 1.4 A, 3 A Pin 21mm 31mm 17mm 21 x 31 x 17mm -
RS-stocknr. 418-4146
Fabrikantnummer74095
FabrikantMyrra
4,90 €
Each
Aantal stuks
7.5 → 15V ac 85 → 265V ac 4.2W 1 PCB Mount Flyback 2.1mH 900mA - 18mm 16mm 17.5mm 18 x 16 x 17.5mm -
RS-stocknr. 871-1660
FabrikantnummerB82802A0055A325
FabrikantEPCOS
2,86 €
Each
Aantal stuks
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 1500V ac
RS-stocknr. 106-8800
Fabrikantnummer78615/1C
1,268 €
Each (In a Tube of 50)
Aantal stuks
- - - 2 Through Hole Filtering 2mH - Pin 9.52mm - - 9.52 x 9 x 6.35mm 1kV
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