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. 210-6273
Mfr. Part No.OEP8000
BrandOEP
SGD8.73
Each
units
3.6H 111Ω 111Ω 4dB 1:1 Surface Mount 4100µH 9 x 7.3 x 14.2mm 14.2mm 9mm 7.3mm 4kHz 200Hz -
RS Stock No. 210-6324
Mfr. Part No.PT6E
BrandOEP
SGD12.09
Each
units
3mH - 2.6Ω - 1:1+1 Through Hole - 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 116-9144
Mfr. Part No.PT42E
BrandOEP
SGD7.12
Each
units
3mH 0.8Ω 0.8Ω - 1:1 Through Hole 85µH 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 196-369
Mfr. Part No.PT4
BrandOEP
SGD5.15
Each
units
19µH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 163-4322
Mfr. Part No.750311889
SGD11.068
Each (On a Reel of 100)
units
37µH 0.038Ω 0.175Ω - 1:2.5 Surface Mount 160nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 544-2471
Mfr. Part No.78250C
SGD3.87
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 715-6920
Mfr. Part No.76250ENC
SGD6.62
Each
units
2mH - - 1:1 Through Hole 40µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 106-8817
Mfr. Part No.76250ENC
SGD6.59
Each (In a Tube of 30)
units
2mH - - 1:1 Through Hole 40µH - - 15mm 15mm - - -
RS Stock No. 756-7535
Mfr. Part No.750311593
SGD20.31
Each
units
15µH 0.032Ω 0.008Ω - 3.5:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 106-8557
Mfr. Part No.1001C
SGD6.118
Each (In a Tube of 30)
units
3mH 1.2Ω - 1:1 PCB Mount 22µH - - 15.06mm 15.06mm - - -
RS Stock No. 170-4973
Mfr. Part No.IT313
BrandSchaffner
SGD14.78
Each (In a Box of 100)
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 106-8818
Mfr. Part No.76253/55ENC
SGD6.59
Each (In a Tube of 30)
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH - - 15mm 15mm - - -
RS Stock No. 106-8570
Mfr. Part No.78250C
SGD3.658
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 756-7440
Mfr. Part No.750311564
SGD13.19
Each
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. 163-4307
Mfr. Part No.750311593
SGD15.951
Each (On a Reel of 100)
units
15µH 0.032Ω 0.008Ω - 3.5:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 715-6927
Mfr. Part No.76253/55ENC
SGD6.49
Each
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 800-4340
Mfr. Part No.1001C
SGD6.72
Each
units
3mH 1.2Ω - 1:1 PCB Mount 22µH 15.06 x 15.06 x 15.75mm 15.75mm 15.06mm 15.06mm - - -
RS Stock No. 173-6435
Mfr. Part No.IT313
BrandSchaffner
SGD23.06
Each
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 756-7538
Mfr. Part No.750311591
SGD19.58
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. 196-454
Mfr. Part No.PT8
BrandOEP
SGD7.04
Each
units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
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