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. 756-7519
Mfr. Part No.750311607
R 201.59
Each
units
14µH 0.04Ω 0.01Ω - 2.5:1 Surface Mount 500nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS stock no. 163-4314
Mfr. Part No.750311607
R 163.604
Each (On a Reel of 125)
units
14µH 0.04Ω 0.01Ω - 2.5:1 Surface Mount 500nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS stock no. 210-6302
Mfr. Part No.PT10
BrandOEP
R 81.70
Each
units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS stock no. 106-8570
Mfr. Part No.78250C
R 44.044
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS stock no. 544-2471
Mfr. Part No.78250C
R 47.17
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS stock no. 170-4967
Mfr. Part No.IT245
BrandSchaffner
R 68.43
Each (In a Box of 200)
units
8mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS stock no. 210-6273
Mfr. Part No.OEP8000
BrandOEP
R 101.19
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. 173-6429
Mfr. Part No.IT258
BrandSchaffner
R 175.50
Each
units
2.5mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS stock no. 196-454
Mfr. Part No.PT8
BrandOEP
R 81.70
Each
units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS stock no. 170-4972
Mfr. Part No.IT258
BrandSchaffner
R 109.997
Each (In a Box of 200)
units
2.5mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS stock no. 173-6340
Mfr. Part No.IT245
BrandSchaffner
R 100.67
Each
units
8mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS stock no. 161-8042
Mfr. Part No.DXW21BN7511TL
R 3.88
Each (On a Reel of 2000)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS stock no. 210-6223
Mfr. Part No.OEP1200
BrandOEP
R 103.71
Each
units
4.15H 65Ω 65Ω 1.3dB 1:1 Through Hole 20mH 18 x 18 x 12.5mm 12.5mm 18mm 18mm 4kHz 300Hz -
RS stock no. 106-8559
Mfr. Part No.782482/33VC
R 27.169
Each (In a Tube of 50)
units
310µH 600mΩ - - 1:1.33 Through Hole 8µH - - 6.35mm 9.14mm - - -
RS stock no. 106-2888
Mfr. Part No.DXW21BN7511TL
R 3.925
Each (In a Pack of 10)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS stock no. 106-8563
Mfr. Part No.78253/35MC
R 44.987
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
RS stock no. 109-4149
Mfr. Part No.ATB322524-0110
BrandTDK
R 15.068
Each (On a Reel of 1000)
units
7µH 0.5Ω 60Ω - 0.0008125 Surface Mount 0.4µH - - 3.2mm 2.5mm - - -
RS stock no. 715-6905
Mfr. Part No.782482/53VC
R 37.87
Each
units
260µH 600mΩ - - 1.14:1 Through Hole 8µH 9.77 x 9.14 x 6.35mm 9.77mm 6.35mm 9.14mm - - -
RS stock no. 715-6872
Mfr. Part No.78253/35MC
R 52.13
Each
units
0.38mH - - 1:2.27 Surface Mount 1µH 9 x 12.7 x 6.55mm 6.55mm 9mm 12.7mm - - -
RS stock no. 756-7406
Mfr. Part No.750311889
R 181.88
Each
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 - - -