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. 163-4301
Mfr. Part No.750311457
MYR23.257
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. 163-4297
Mfr. Part No.750311307
MYR27.41
Each (On a Reel of 250)
units
100µH 0.29Ω 0.104Ω - 2:1 Surface Mount 3µH 15.24 x 13.34 x 11.43mm 11.43mm 15.24mm 13.34mm - - -
RS Stock No. 173-6429
Mfr. Part No.IT258
BrandSchaffner
MYR39.67
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. 715-6882
Mfr. Part No.78253/35MVC
MYR14.03
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. 715-6908
Mfr. Part No.782485/55C
MYR8.59
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. 106-8571
Mfr. Part No.78253/55C
MYR10.31
Each (In a Tube of 50)
units
0.83mH 1.5Ω - - 1:1.31 Through Hole 1µH - - 9mm 9.52mm - - -
RS Stock No. 173-6435
Mfr. Part No.IT313
BrandSchaffner
MYR62.58
Each
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 170-4971
Mfr. Part No.IT248
BrandSchaffner
MYR16.85
Each (In a Box of 200)
units
17mH - - - 2:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 163-4323
Mfr. Part No.750311911
MYR36.544
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. 667-5940
Mfr. Part No.PT6SM
BrandOEP
MYR19.69
Each
units
3mH 0.65Ω 0.55Ω - 1:1:1 Surface Mount 1.8 μH, 3.5 μH 13.1 x 17 x 11.95mm 11.95mm 13.1mm 17mm - - -
RS Stock No. 756-7440
Mfr. Part No.750311564
MYR37.14
Each
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. 756-7373
Mfr. Part No.749118205
MYR32.68
Each
units
0.9mH 4.3Ω 26mΩ - 19:1:1 Through Hole 175µH 18 x 16.5 x 18mm 18mm 18mm 16.5mm - - -
RS Stock No. 173-6390
Mfr. Part No.IT253
BrandSchaffner
MYR25.03
Each
units
1.1mH - - - 1:1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 210-6223
Mfr. Part No.OEP1200D
BrandOEP
MYR16.24
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. 218-9852
Mfr. Part No.IT243
BrandSchaffner
MYR25.03
Each
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. 715-6905
Mfr. Part No.782482/53VC
MYR8.59
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. 109-4149
Mfr. Part No.ATB322524-0110
BrandTDK
MYR3.49
Each (On a Reel of 1000)
units
7µH 0.5Ω 60Ω - 0.0008125 Surface Mount 0.4µH - - 3.2mm 2.5mm - - -
RS Stock No. 106-8562
Mfr. Part No.78250MC
MYR10.31
Each (In a Tube of 50)
units
2mH - - Surface Mount 3µH - - 9mm 12.7mm - - -
RS Stock No. 544-2471
Mfr. Part No.78250C
MYR10.88
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 883-9095
Mfr. Part No.IT213
BrandSchaffner
MYR34.23
Each (In a Pack of 100)
units
6.5mH 1.4Ω 1.4Ω - 1:1:1 Through Hole 20µH - - 19mm - 40 kHz, 500 (Data Transmission) kHz - Enclosed
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