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. 196-454
Mfr. Part No.PT8
BrandOEP
PHP319.19
Each
units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 210-6302
Mfr. Part No.PT10
BrandOEP
PHP227.56
Each
units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 883-9124
Mfr. Part No.IT370
BrandSchaffner
PHP870.835
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. 161-8042
Mfr. Part No.DXW21BN7511TL
PHP16.616
Each (On a Reel of 2000)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS Stock No. 172-8671
Mfr. Part No.SM-LP-5001
BrandBourns
PHP74.03
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 -
RS Stock No. 170-4970
Mfr. Part No.IT253
BrandSchaffner
PHP187.758
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. 196-369
Mfr. Part No.PT4
BrandOEP
PHP235.59
Each
units
19µH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 173-6390
Mfr. Part No.IT253
BrandSchaffner
PHP293.88
Each
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. 210-6273
Mfr. Part No.OEP8000
BrandOEP
PHP402.68
Each
units
3.6H 111Ω 111Ω 4dB 1:1 Surface Mount 4100µH 9 x 7.3 x 14.2mm 14.2mm 9mm 7.3mm 4kHz 200Hz -
RS Stock No. 106-2888
Mfr. Part No.DXW21BN7511TL
PHP33.291
Each (In a Pack of 10)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS Stock No. 218-9880
Mfr. Part No.SM-LP-5001
BrandBourns
PHP105.56
Each
units
3.8H 115Ω 115Ω 2dB 1:1 Surface Mount 6mH 9.6 x 7.36 x 14mm 14mm 9.6mm 7.36mm 4kHz 0.2kHz -
RS Stock No. 170-4969
Mfr. Part No.IT255
BrandSchaffner
PHP178.154
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. 544-2471
Mfr. Part No.78250C
PHP126.48
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 106-8570
Mfr. Part No.78250C
PHP121.011
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 173-6384
Mfr. Part No.IT255
BrandSchaffner
PHP275.79
Each
units
22mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 883-9095
Mfr. Part No.IT213
BrandSchaffner
PHP397.577
Each (In a Pack of 100)
units
6.5mH 1.4Ω 1.4Ω - 1:1:1 Through Hole 20µH - - 19mm - 40 kHz, 500 (Data Transmission) kHz - Enclosed
RS Stock No. 756-7535
Mfr. Part No.750311593
PHP667.76
Each
units
15µH 0.032Ω 0.008Ω - 3.5:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 883-9121
Mfr. Part No.IT364
BrandSchaffner
PHP3,475.936
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. 756-7399
Mfr. Part No.750311692
PHP283.57
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. 756-7430
Mfr. Part No.750311567
PHP468.16
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 - - -
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