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. 106-8557
Mfr. Part No.1001C
$6.44
Each (In a Tube of 30)
units
3mH 1.2Ω - 1:1 PCB Mount 22µH - - 15.06mm 15.06mm - - -
RS Stock No. 210-6318
Mfr. Part No.PT4E
BrandOEP
$12.66
Each
units
3mH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 210-6330
Mfr. Part No.PT10E
BrandOEP
$9.61
Each
units
- 5.1Ω 2.6Ω - 2:1 Through Hole 115µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 170-4967
Mfr. Part No.IT245
BrandSchaffner
$5.67
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. 667-5947
Mfr. Part No.PT4SM
BrandOEP
$7.94
Each
units
3mH 0.36Ω 0.46Ω - 1:1 Surface Mount 3 μH, 4 μH 13.1 x 17 x 11.95mm 11.95mm 13.1mm 17mm - - -
RS Stock No. 196-454
Mfr. Part No.PT8
BrandOEP
$7.47
Each
units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 173-6340
Mfr. Part No.IT245
BrandSchaffner
$8.85
Each
units
8mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 210-6346
Mfr. Part No.PT8E
BrandOEP
$12.85
Each
units
- 4.2Ω - 2:1+1 Through Hole 30µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 162-0595
Mfr. Part No.IT243
BrandSchaffner
$5.98
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. 106-8564
Mfr. Part No.78253/35MVC
$5.00
Each (In a Tube of 50)
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH - - 9mm 12.7mm - - -
RS Stock No. 170-9232
Mfr. Part No.76601/2C
$2.98
Each (On a Reel of 50)
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 756-7468
Mfr. Part No.750311911
$15.14
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. 756-7399
Mfr. Part No.750311692
$8.41
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. 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. 163-4303
Mfr. Part No.750311564
$10.18
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. 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. 163-4323
Mfr. Part No.750311911
$14.214
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. 756-7484
Mfr. Part No.750311385
$13.45
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. 629-9183
Mfr. Part No.76601/2C
$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. 210-6302
Mfr. Part No.PT10
BrandOEP
$7.47
Each
units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
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