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. 756-7399
Mfr. Part No.750311692
SGD8.29
Each
units
80µH 0.325Ω 8.7Ω - 5:1 Surface Mount 2µH 9.14 x 9.78 x 10.54mm 10.54mm 9.14mm 9.78mm - - -
RS Stock No. 106-8569
Mfr. Part No.782485/35C
SGD2.407
Each (In a Tube of 50)
units
234µH 0.5Ω - - 1:2.2 Through Hole 0.168µH - - 9.14mm 10.46mm - - -
RS Stock No. 106-8572
Mfr. Part No.78253/35C
SGD4.039
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Through Hole 1µH - - 9mm 9.52mm - - -
RS Stock No. 629-9199
Mfr. Part No.76601/3C
SGD3.28
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 629-9177
Mfr. Part No.76601/1C
SGD3.09
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 756-7529
Mfr. Part No.750311590
SGD18.66
Each
units
8µH 0.015Ω 0.008Ω - 2:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 756-7412
Mfr. Part No.750311305
SGD15.37
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. 106-8565
Mfr. Part No.78253/55MC
SGD4.039
Each (In a Tube of 50)
units
0.83mH 1.5Ω - - 1:1.31 Surface Mount 1µH - - 9mm 12.7mm - - -
RS Stock No. 163-4310
Mfr. Part No.750311597
SGD13.50
Each (On a Reel of 125)
units
6µH 0.02Ω 0.004Ω - 3:1 Surface Mount 300nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 883-9099
Mfr. Part No.IT233
BrandSchaffner
SGD7.16
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. 715-6898
Mfr. Part No.782485/35C
SGD3.16
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. 210-6318
Mfr. Part No.PT4E
BrandOEP
SGD11.80
Each
units
3mH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 170-9231
Mfr. Part No.76601/1C
SGD3.131
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. 163-4312
Mfr. Part No.750311604
SGD13.50
Each (On a Reel of 125)
units
8µH 0.03Ω 0.035Ω - 1:1 Surface Mount 400nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 883-9124
Mfr. Part No.IT370
BrandSchaffner
SGD25.45
Each (In a Pack of 300)
units
0.3mH 0.16Ω 0.18Ω - 1:1 Through Hole 6µH - - 27mm 32.2mm 40 kHz, 500 (Data Transmission) kHz - Enclosed
RS Stock No. 162-1335
Mfr. Part No.750311590
SGD15.19
Each (On a Reel of 100)
units
8µH 0.015Ω 0.008Ω - 2:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 170-4971
Mfr. Part No.IT248
BrandSchaffner
SGD6.21
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. 667-5940
Mfr. Part No.PT6SM
BrandOEP
SGD7.43
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. 161-8042
Mfr. Part No.DXW21BN7511TL
SGD0.538
Each (On a Reel of 2000)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS Stock No. 106-8563
Mfr. Part No.78253/35MC
SGD4.039
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
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