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. 667-5947
Mfr. Part No.PT4SM
BrandOEP
MYR26.02
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. 170-9231
Mfr. Part No.76601/1C
MYR7.98
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. 756-7412
Mfr. Part No.750311305
MYR53.79
Each
units
50µH 0.175Ω 0.028Ω - 3:1 Surface Mount 2µH 15.24 x 13.34 x 11.43mm 11.43mm 15.24mm 13.34mm - - -
RS Stock No. 544-2471
Mfr. Part No.78250C
MYR11.64
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 800-4340
Mfr. Part No.1001C
MYR17.61
Each
units
3mH 1.2Ω - 1:1 PCB Mount 22µH 15.06 x 15.06 x 15.75mm 15.75mm 15.06mm 15.06mm - - -
RS Stock No. 106-8572
Mfr. Part No.78253/35C
MYR10.389
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Through Hole 1µH - - 9mm 9.52mm - - -
RS Stock No. 170-4970
Mfr. Part No.IT253
BrandSchaffner
MYR16.67
Each (In a Box of 200)
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. 715-6872
Mfr. Part No.78253/35MC
MYR10.88
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. 170-9324
Mfr. Part No.78602/9JC
MYR6.573
Each (On a Reel of 50)
units
10000µH 1.8Ω - - 1:1:1 Surface Mount 0.71µH - - 9.52mm 9mm - - Enclosed
RS Stock No. 756-7538
Mfr. Part No.750311591
MYR59.02
Each
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. 533-0160
Mfr. Part No.Z1258E
BrandOEP
MYR71.11
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. 800-4423
Mfr. Part No.78604/1C
MYR8.076
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. 210-6324
Mfr. Part No.PT6E
BrandOEP
MYR36.69
Each
units
3mH - 2.6Ω - 1:1+1 Through Hole - 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
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. 756-7430
Mfr. Part No.750311567
MYR40.54
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. 163-4323
Mfr. Part No.750311911
MYR39.627
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. 106-8570
Mfr. Part No.78250C
MYR11.316
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 756-7395
Mfr. Part No.750311691
MYR21.36
Each
units
60µH 0.315Ω 7.95Ω - 1:5 Surface Mount 1µH 8.26 x 6.6 x 5.59mm 5.59mm 8.26mm 6.6mm - - -
RS Stock No. 715-6898
Mfr. Part No.782485/35C
MYR8.59
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. 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 - - -