Telecom Transformers

Telecom transformers can serve a variety of roles. For example, they can function as isolation transformers, preparing the voltage before transmission across telecom cables or adjusting the voltage so that it is suitable for a low-voltage application inside the home.

What are telecom transformers used for?

The telecom transformer is one of the most common and vital components in any telecommunications system. Other types of equipment, such as resistors and capacitors, are sometimes used to achieve the same goals that a telecom transformer achieves. However, telecom transformers perform these tasks with a greater degree of efficiency and ease of use, and thus are more commonly used than their alternatives.

Types of telecom transformers

Telecom transformers are designed with different types of inductance, mounting styles and other specifications that dictate whether those devices will be appropriate for a given application or use in a given device.

They can be mounted in different ways. Some designs are surface mounted, while others are mounted through the holes in a breadboard.


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Description Price Primary Inductance Primary DC Resistance Secondary DC Resistance Insertion Loss Turns Ratio Mounting Type Leakage Inductance Dimensions Depth Length Width Maximum Operating Frequency Minimum Operating Frequency Construction
RS Stock No. 163-4308
Mfr. Part No.750311594
€9.479
Each (On a Reel of 100)
units
15µH 0.035Ω 0.015Ω - 2.33:1 Surface Mount 550nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 162-0595
Mfr. Part No.IT243
BrandSchaffner
€3.714
Each (In a Box of 200)
units
2.5mH - - - 1:1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 756-7538
Mfr. Part No.750311591
€15.02
Each
units
8µH 0.015Ω 0.012Ω - 1.5:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 218-9880
Mfr. Part No.SM-LP-5001
BrandBourns
€1.88
Each
units
3.8H 115Ω 115Ω 2dB 1:1 Surface Mount 6mH 9.6 x 7.36 x 14mm 14mm 9.6mm 7.36mm 4kHz 0.2kHz -
RS Stock No. 163-4306
Mfr. Part No.750311592
€6.704
Each (On a Reel of 100)
units
8µH 0.015Ω 0.02Ω - 1:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 163-4303
Mfr. Part No.750311564
€4.516
Each (On a Reel of 200)
units
9.07µH 0.036Ω 0.007Ω - 3:1 Surface Mount 250nH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 170-9324
Mfr. Part No.78602/9JC
€1.262
Each (On a Reel of 50)
units
10000µH 1.8Ω - - 1:1:1 Surface Mount 0.71µH - - 9.52mm 9mm - - Enclosed
RS Stock No. 163-4301
Mfr. Part No.750311457
€5.172
Each (On a Reel of 200)
units
50µH 0.115Ω 0.012Ω - 4:1 Surface Mount 1.2µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 106-8562
Mfr. Part No.78250MC
€2.083
Each (In a Tube of 50)
units
2mH - - Surface Mount 3µH - - 9mm 12.7mm - - -
RS Stock No. 170-4968
Mfr. Part No.IT242
BrandSchaffner
€3.689
Each (In a Box of 200)
units
2.5mH - - - 1:1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 756-7399
Mfr. Part No.750311692
€5.30
Each
units
80µH 0.325Ω 8.7Ω - 5:1 Surface Mount 2µH 9.14 x 9.78 x 10.54mm 10.54mm 9.14mm 9.78mm - - -
RS Stock No. 831-9321
Mfr. Part No.ATB3225-75034CT
BrandTDK
€1.60
Each
units
- 0.7Ω - 2dB 3:4 Surface Mount - 3.2 x 2.5 x 2.3mm 2.3mm 3.2mm 2.5mm 100MHz 1MHz -
RS Stock No. 715-6885
Mfr. Part No.78253/55MC
€2.24
Each
units
0.83mH 1.5Ω - - 1:1.31 Surface Mount 1µH 9 x 12.7 x 6.55mm 6.55mm 9mm 12.7mm - - -
RS Stock No. 173-6435
Mfr. Part No.IT313
BrandSchaffner
€12.93
Each
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 106-8564
Mfr. Part No.78253/35MVC
€2.769
Each (In a Tube of 50)
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH - - 9mm 12.7mm - - -
RS Stock No. 163-4299
Mfr. Part No.750311385
€6.438
Each (On a Reel of 125)
units
15µH 0.02Ω 0.012Ω - 1.25:1 Surface Mount 200nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 167-4838
Mfr. Part No.DXW21BN7511SL
BrandMurata
€0.318
Each (On a Reel of 2000)
units
- 75Ω 75Ω 1.4dB 1:1 Surface Mount - 2 x 1.2 x 1.2mm 1.2mm 2mm 1.2mm - - -
RS Stock No. 171-0807
Mfr. Part No.ATB3225-75034CT
BrandTDK
€0.863
Each (On a Reel of 1000)
units
- 0.7Ω - 2dB 3:4 Surface Mount - 3.2 x 2.5 x 2.3mm 2.3mm 3.2mm 2.5mm 100MHz 1MHz -
RS Stock No. 715-6898
Mfr. Part No.782485/35C
€1.74
Each
units
234µH 0.5Ω - - 1:2.2 Through Hole 0.168µH 9.14 x 10.46 x 6.35mm 6.35mm 9.14mm 10.46mm - - -
RS Stock No. 170-4970
Mfr. Part No.IT253
BrandSchaffner
€3.94
Each (In a Box of 200)
units
1.1mH - - - 1:1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
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