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. 170-4969
Mfr. Part No.IT255
BrandSchaffner
€3.134
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. 629-9177
Mfr. Part No.76601/1C
€1.72
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 171-0807
Mfr. Part No.ATB3225-75034CT
BrandTDK
€0.838
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. 800-4423
Mfr. Part No.78604/1C
€1.328
Each (In a Bag of 5)
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. 116-9144
Mfr. Part No.PT42E
BrandOEP
€5.11
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. 533-0160
Mfr. Part No.Z1258E
BrandOEP
€6.17
Each
units
2H 45Ω 45Ω 1.1dB 1:1 Through Hole 6mH 19 x 15 x 11.3mm 11.3mm 19mm 15mm - - -
RS Stock No. 667-5966
Mfr. Part No.LAD4613
BrandOEP
€5.70
Each
units
2.5mH - - - 1:1 Through Hole 0.5µH 10.16 x 8.89 x 6.35mm 6.35mm 10.16mm 8.89mm 55MHz 100kHz -
RS Stock No. 106-8558
Mfr. Part No.1002C
€3.921
Each (In a Tube of 30)
units
3mH 1.4Ω 1.7Ω - 1:1 PCB Mount 9µH - - 15.06mm 15.06mm - - -
RS Stock No. 800-4344
Mfr. Part No.1002C
€4.02
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. 715-6882
Mfr. Part No.78253/35MVC
€3.05
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. 629-9183
Mfr. Part No.76601/2C
€1.70
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 106-8571
Mfr. Part No.78253/55C
€1.558
Each (In a Tube of 50)
units
0.83mH 1.5Ω - - 1:1.31 Through Hole 1µH - - 9mm 9.52mm - - -
RS Stock No. 715-6920
Mfr. Part No.76250ENC
€3.77
Each
units
2mH - - 1:1 Through Hole 40µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 167-5963
Mfr. Part No.78604/1C
€1.25
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. 106-8561
Mfr. Part No.782485/55C
€1.268
Each (In a Tube of 50)
units
513µH 0.6Ω - - 1:1.5 Through Hole 0.192µH - - 9.14mm 10.46mm - - -
RS Stock No. 170-4972
Mfr. Part No.IT258
BrandSchaffner
€5.122
Each (In a Box of 200)
units
2.5mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 167-4838
Mfr. Part No.DXW21BN7511SL
BrandMurata
€0.171
Each (On a Reel of 2000)
units
- 75Ω 75Ω 1.4dB 1:1 Surface Mount - 2 x 1.2 x 1.2mm 1.2mm 2mm 1.2mm - - -
RS Stock No. 667-5947
Mfr. Part No.PT4SM
BrandOEP
€4.63
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. 883-9099
Mfr. Part No.IT233
BrandSchaffner
€4.02
Each (In a Pack of 100)
units
3mH 0.8Ω 0.8Ω - 1:1:1 Through Hole 45µH - - 27mm 22.5mm 40 kHz, 500 (Data Transmission) kHz - Enclosed
RS Stock No. 162-0595
Mfr. Part No.IT243
BrandSchaffner
€3.714
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 - - -