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. 109-4149
Mfr. Part No.ATB322524-0110
BrandTDK
€0.647
Each (On a Reel of 1000)
units
7µH 0.5Ω 60Ω - 0.0008125 Surface Mount 0.4µH - - 3.2mm 2.5mm - - -
RS Stock No. 756-7409
Mfr. Part No.750311486
€6.91
Each
units
100µH 0.22Ω 31Ω - 1:10 Surface Mount 4.5µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 756-7459
Mfr. Part No.750311624
€4.40
Each
units
9µH 0.034Ω 0.021Ω - 1.5:1 Surface Mount 250nH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 196-375
Mfr. Part No.PT6
BrandOEP
€4.37
Each
units
3mH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 715-6872
Mfr. Part No.78253/35MC
€2.34
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. 629-9177
Mfr. Part No.76601/1C
€1.72
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 715-6927
Mfr. Part No.76253/55ENC
€4.07
Each
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 106-8566
Mfr. Part No.78253/55MVC
€2.769
Each (In a Tube of 50)
units
240µH 0.6Ω - - 1:1.31 Surface Mount 8µH - - 9mm 12.7mm - - -
RS Stock No. 106-8558
Mfr. Part No.1002C
€3.847
Each (In a Tube of 30)
units
3mH 1.4Ω 1.7Ω - 1:1 PCB Mount 9µH - - 15.06mm 15.06mm - - -
RS Stock No. 667-5966
Mfr. Part No.LAD4613
BrandOEP
€5.70
Each
units
2.5mH - - - 1:1 Through Hole 0.5µH 10.16 x 8.89 x 6.35mm 6.35mm 10.16mm 8.89mm 55MHz 100kHz -
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. 756-7519
Mfr. Part No.750311607
€9.68
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. 163-4303
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. 210-6346
Mfr. Part No.PT8E
BrandOEP
€5.31
Each
units
- 4.2Ω - 2:1+1 Through Hole 30µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 106-8563
Mfr. Part No.78253/35MC
€2.126
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
RS Stock No. 756-7529
Mfr. Part No.750311590
€11.29
Each
units
8µH 0.015Ω 0.008Ω - 2:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 533-0198
Mfr. Part No.Z1656
BrandOEP
€2.39
Each
units
12H 63Ω 63Ω 0.8dB - Through Hole 35 mH, 35000 μH 18 x 12.7 x 18mm 18mm 18mm 12.7mm - - -
RS Stock No. 163-4311
Mfr. Part No.750311599
€5.476
Each (On a Reel of 125)
units
8µH 0.03Ω 0.012Ω - 1.5:1 Surface Mount 1µH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 173-6407
Mfr. Part No.IT248
BrandSchaffner
€5.44
Each
units
17mH - - - 2:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
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