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. 196-375
Mfr. Part No.PT6
BrandOEP
£3.87
Each
Units
3mH 1.1Ω 0.9Ω - 1:1 Through Hole 19µH 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 210-6223
Mfr. Part No.OEP1200D
BrandOEP
£4.21
Each
Units
4.15H 65Ω 65Ω 1.3dB 1:1 Through Hole 20mH 18 x 18 x 12.5mm 12.5mm 18mm 18mm 4kHz 300Hz -
RS Stock No. 106-8570
Mfr. Part No.78250C
£1.843
Each (In a Tube of 50)
Units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 544-2471
Mfr. Part No.78250C
£1.95
Each
Units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 210-6273
Mfr. Part No.OEP8000
BrandOEP
£4.36
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. 196-369
Mfr. Part No.PT4
BrandOEP
£3.70
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. 210-6324
Mfr. Part No.PT6E
BrandOEP
£4.73
Each
Units
3mH - 2.6Ω - 1:1+1 Through Hole - 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 167-5963
Mfr. Part No.78604/1C
£1.106
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. 800-4423
Mfr. Part No.78604/1C
£1.144
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. 172-8671
Mfr. Part No.SM-LP-5001
BrandBourns
£1.086
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. 218-9880
Mfr. Part No.SM-LP-5001
BrandBourns
£1.63
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. 116-9144
Mfr. Part No.PT42E
BrandOEP
£4.52
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. 196-454
Mfr. Part No.PT8
BrandOEP
£3.65
Each
Units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 109-4149
Mfr. Part No.ATB322524-0110
BrandTDK
£0.616
Each (On a Reel of 1000)
Units
7µH 0.5Ω 60Ω - 0.0008125 Surface Mount 0.4µH - - 3.2mm 2.5mm - - -
RS Stock No. 831-9315
Mfr. Part No.ATB322524-0110
BrandTDK
£1.38
Each
Units
7µH 0.5Ω 60Ω - 1:10.2 Surface Mount 0.4µH 3.2 x 2.5 x 2.4mm 2.4mm 3.2mm 2.5mm - - -
RS Stock No. 210-6302
Mfr. Part No.PT10
BrandOEP
£2.83
Each
Units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 106-8558
Mfr. Part No.1002C
£3.405
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
£3.49
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. 163-4302
Mfr. Part No.750311486
£2.316
Each (On a Reel of 200)
Units
100µH 0.22Ω 31Ω - 1:10 Surface Mount 4.5µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 756-7409
Mfr. Part No.750311486
£2.36
Each
Units
100µH 0.22Ω 31Ω - 1:10 Surface Mount 4.5µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
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