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. 196-375
Mfr. Part No.PT6
BrandOEP
$8.07
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. 106-8563
Mfr. Part No.78253/35MC
$4.235
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
RS Stock No. 715-6872
Mfr. Part No.78253/35MC
$4.48
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. 756-7519
Mfr. Part No.750311607
$19.24
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. 106-8570
Mfr. Part No.78250C
$4.235
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 116-9144
Mfr. Part No.PT42E
BrandOEP
$8.52
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. 544-2471
Mfr. Part No.78250C
$3.92
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 163-4314
Mfr. Part No.750311607
$15.67
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. 715-6879
Mfr. Part No.78253/35C
$4.48
Each
units
0.38mH - - 1:2.27 Through Hole 1µH 9 x 9.52 x 6.35mm 6.35mm 9mm 9.52mm - - -
RS Stock No. 667-5947
Mfr. Part No.PT4SM
BrandOEP
$8.81
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. 171-0807
Mfr. Part No.ATB3225-75034CT
BrandTDK
$1.64
Each (On a Reel of 1000)
units
- 0.7Ω - 2dB 3:4 Surface Mount - 3.2 x 2.5 x 2.3mm 2.3mm 3.2mm 2.5mm 100MHz 1MHz -
RS Stock No. 163-4301
Mfr. Part No.750311457
$9.88
Each (On a Reel of 200)
units
50µH 0.115Ω 0.012Ω - 4:1 Surface Mount 1.2µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 800-4344
Mfr. Part No.1002C
$8.38
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. 715-6898
Mfr. Part No.782485/35C
$3.70
Each
units
234µH 0.5Ω - - 1:2.2 Through Hole 0.168µH 9.14 x 10.46 x 6.35mm 6.35mm 9.14mm 10.46mm - - -
RS Stock No. 163-4305
Mfr. Part No.750311591
$19.19
Each (On a Reel of 100)
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. 210-6245
Mfr. Part No.Z1612E
BrandOEP
$21.75
Each
units
- 68Ω 68Ω 1.5dB 1:1 Through Hole - 18 x 12.5 x 18mm 18mm 18mm 12.5mm - - -
RS Stock No. 210-6330
Mfr. Part No.PT10E
BrandOEP
$9.07
Each
units
- 5.1Ω 2.6Ω - 2:1 Through Hole 115µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 173-6435
Mfr. Part No.IT313
BrandSchaffner
$25.73
Each
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 756-7406
Mfr. Part No.750311889
$16.35
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 - - -
RS Stock No. 715-6882
Mfr. Part No.78253/35MVC
$5.76
Each
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH 9 x 12.7 x 6.55mm 6.55mm 9mm 12.7mm - - -
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