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. 106-8567
Mfr. Part No.78253/55VC
$5.53
Each (In a Tube of 50)
units
240µH 0.6Ω - - 1:1.31 Through Hole 8µH - - 9mm 9.52mm - - -
RS Stock No. 715-6891
Mfr. Part No.78253/55VC
$5.24
Each
units
240µH 0.6Ω - - 1:1.31 Through Hole 8µH 9 x 9.52 x 6.35mm 6.35mm 9mm 9.52mm - - -
RS Stock No. 106-8564
Mfr. Part No.78253/35MVC
$5.53
Each (In a Tube of 50)
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH - - 9mm 12.7mm - - -
RS Stock No. 162-0595
Mfr. Part No.IT243
BrandSchaffner
$6.61
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. 715-6882
Mfr. Part No.78253/35MVC
$5.24
Each
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH 9 x 12.7 x 6.55mm 6.55mm 9mm 12.7mm - - -
RS Stock No. 756-7468
Mfr. Part No.750311911
$16.73
Each
units
6.78µH 0.02Ω 0.45 (12-11 and 10-9) Ω, 0.47 (14-13 and 8-7) Ω - 1:3 Surface Mount 200nH 25 x 22.2 x 16mm 16mm 25mm 22.2mm - - -
RS Stock No. 163-4323
Mfr. Part No.750311911
$14.99
Each (In a Tray of 70)
units
6.78µH 0.02Ω 0.45 (12-11 and 10-9) Ω, 0.47 (14-13 and 8-7) Ω - 1:3 Surface Mount 200nH 25 x 22.2 x 16mm 16mm 25mm 22.2mm - - -
RS Stock No. 715-6908
Mfr. Part No.782485/55C
$3.21
Each
units
513µH 0.6Ω - - 1:1.5 Through Hole 0.192µH 9.14 x 10.46 x 6.35mm 6.35mm 9.14mm 10.46mm - - -
RS Stock No. 756-7484
Mfr. Part No.750311385
$14.87
Each
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. 831-9315
Mfr. Part No.ATB322524-0110
BrandTDK
$3.29
Each
units
7µH 0.5Ω 60Ω - 1:10.2 Surface Mount 0.4µH 3.2 x 2.5 x 2.4mm 2.4mm 3.2mm 2.5mm - - -
RS Stock No. 629-9199
Mfr. Part No.76601/3C
$3.24
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 756-7519
Mfr. Part No.750311607
$18.59
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. 800-4344
Mfr. Part No.1002C
$7.51
Each
units
3mH 1.4Ω 1.7Ω - 1:1:1 PCB Mount 9µH 15.06 x 15.06 x 15.75mm 15.75mm 15.06mm 15.06mm - - -
RS Stock No. 173-6435
Mfr. Part No.IT313
BrandSchaffner
$25.86
Each
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 210-6324
Mfr. Part No.PT6E
BrandOEP
$12.85
Each
units
3mH - 2.6Ω - 1:1+1 Through Hole - 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 106-8818
Mfr. Part No.76253/55ENC
$7.39
Each (In a Tube of 30)
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH - - 15mm 15mm - - -
RS Stock No. 167-5963
Mfr. Part No.78604/1C
$2.29
Each (In a Tube of 50)
units
2000µH 0.6Ω - - 2:1 Through Hole 0.99µH 9.52 x 9 x 6.35mm 6.35mm 9.52mm 9mm - - -
RS Stock No. 163-4308
Mfr. Part No.750311594
$18.54
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. 170-4969
Mfr. Part No.IT255
BrandSchaffner
$6.27
Each (In a Box of 200)
units
22mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 756-7531
Mfr. Part No.750311592
$22.78
Each
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 - - -
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