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. 715-6882
Mfr. Part No.78253/35MVC
HK$30.82
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. 106-8572
Mfr. Part No.78253/35C
HK$24.502
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
HK$18.42
Each
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 162-1335
Mfr. Part No.750311590
HK$93.713
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. 106-8560
Mfr. Part No.782482/53VC
HK$13.482
Each (In a Tube of 50)
units
260µH 600mΩ - - 1.14:1 Through Hole 8µH - - 6.35mm 9.14mm - - -
RS Stock No. 173-6340
Mfr. Part No.IT245
BrandSchaffner
HK$54.45
Each
units
8mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 170-4973
Mfr. Part No.IT313
BrandSchaffner
HK$92.079
Each (In a Box of 100)
units
3mH - - - 1:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 106-8564
Mfr. Part No.78253/35MVC
HK$29.379
Each (In a Tube of 50)
units
142µH 0.5Ω - - 1:2.14 Surface Mount 5µH - - 9mm 12.7mm - - -
RS Stock No. 715-6905
Mfr. Part No.782482/53VC
HK$18.87
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. 715-6920
Mfr. Part No.76250ENC
HK$40.16
Each
units
2mH - - 1:1 Through Hole 40µH 15 x 15 x 12.5mm 12.5mm 15mm 15mm - - -
RS Stock No. 163-4322
Mfr. Part No.750311889
HK$71.833
Each (On a Reel of 100)
units
37µH 0.038Ω 0.175Ω - 1:2.5 Surface Mount 160nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 163-4296
Mfr. Part No.750311305
HK$74.939
Each (On a Reel of 250)
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. 170-4967
Mfr. Part No.IT245
BrandSchaffner
HK$34.409
Each (In a Box of 200)
units
8mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 163-4303
Mfr. Part No.750311564
HK$62.725
Each (On a Reel of 200)
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. 163-4320
Mfr. Part No.750311771
HK$103.553
Each (On a Reel of 100)
units
500µH 0.45Ω 0.05Ω - 6:1 Surface Mount 10µH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 533-0176
Mfr. Part No.Z1640E
BrandOEP
HK$122.93
Each
units
1.9H 32Ω 42Ω 1.1dB 1:1 Through Hole 1.6mH 18 x 14.5 x 18mm 18mm 18mm 14.5mm 4kHz 200Hz -
RS Stock No. 163-4311
Mfr. Part No.750311599
HK$83.38
Each (On a Reel of 125)
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. 210-6318
Mfr. Part No.PT4E
BrandOEP
HK$80.98
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. 218-9852
Mfr. Part No.IT243
BrandSchaffner
HK$57.37
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. 172-8671
Mfr. Part No.SM-LP-5001
BrandBourns
HK$12.401
Each (In a Bag of 53)
units
3.8H - - 2dB 1:1 Surface Mount 6mH 9.6 x 7.36 x 14mm 14mm 9.6mm 7.36mm 4kHz 0.2kHz -