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. 163-4323
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. 756-7430
Mfr. Part No.750311567
MYR36.78
Each
units
7µH 0.07Ω 0.023Ω - 2:1 Surface Mount 800nH 15.24 x 13.34 x 11.43mm 11.43mm 15.24mm 13.34mm - - -
RS Stock No. 831-9321
Mfr. Part No.ATB3225-75034CT
BrandTDK
MYR7.28
Each
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. 756-7468
Mfr. Part No.750311911
MYR43.25
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. 715-6860
Mfr. Part No.78250MC
MYR10.88
Each
units
2mH - - Surface Mount 3µH 9 x 12.7 x 6.65mm 6.65mm 9mm 12.7mm - - -
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. 715-6891
Mfr. Part No.78253/55VC
MYR14.03
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. 210-6245
Mfr. Part No.Z1612E
BrandOEP
MYR41.21
Each
units
- 68Ω 68Ω 1.5dB 1:1 Through Hole - 18 x 12.5 x 18mm 18mm 18mm 12.5mm - - -
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. 106-8566
Mfr. Part No.78253/55MVC
MYR13.37
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
MYR17.313
Each (In a Tube of 30)
units
3mH 1.4Ω 1.7Ω - 1:1 PCB Mount 9µH - - 15.06mm 15.06mm - - -
RS Stock No. 883-9121
Mfr. Part No.IT364
BrandSchaffner
MYR334.213
Each (In a Pack of 48)
units
1.5mH 0.16Ω 0.14Ω - 1:1 Through Hole 10µH - - 50mm 50mm 40 kHz, 500 (Data Transmission) kHz - Enclosed
RS Stock No. 210-6302
Mfr. Part No.PT10
BrandOEP
MYR28.34
Each
units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 756-7500
Mfr. Part No.750311599
MYR44.99
Each
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. 106-8569
Mfr. Part No.782485/35C
MYR5.86
Each (In a Tube of 50)
units
234µH 0.5Ω - - 1:2.2 Through Hole 0.168µH - - 9.14mm 10.46mm - - -
RS Stock No. 106-8817
Mfr. Part No.76250ENC
MYR17.87
Each (In a Tube of 30)
units
2mH - - 1:1 Through Hole 40µH - - 15mm 15mm - - -
RS Stock No. 106-8557
Mfr. Part No.1001C
MYR15.698
Each (In a Tube of 30)
units
3mH 1.2Ω - 1:1 PCB Mount 22µH - - 15.06mm 15.06mm - - -
RS Stock No. 106-8818
Mfr. Part No.76253/55ENC
MYR17.87
Each (In a Tube of 30)
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH - - 15mm 15mm - - -
RS Stock No. 715-6927
Mfr. Part No.76253/55ENC
MYR18.28
Each
units
2mH 0.9Ω - - 1:1.33 Through Hole 10µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 106-8563
Mfr. Part No.78253/35MC
MYR10.31
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
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