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. 196-369
Mfr. Part No.PT4
BrandOEP
HK$50.15
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. 196-375
Mfr. Part No.PT6
BrandOEP
HK$60.15
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. 196-454
Mfr. Part No.PT8
BrandOEP
HK$43.84
Each
units
- - - - 2:1+1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 178-9748
Mfr. Part No.IT314
BrandSchaffner
HK$146.99
Each
units
35mH - - - 3:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 210-6223
Mfr. Part No.OEP1200
BrandOEP
HK$54.58
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. 210-6251
Mfr. Part No.Z1260
BrandOEP
HK$51.36
Each
units
- 65Ω 65Ω 1.5dB 1:1 Through Hole - 19 x 11 x 15mm 15mm 19mm 11mm - - -
RS Stock No. 170-4980
Mfr. Part No.IT314
BrandSchaffner
HK$94.164
Each (In a Box of 100)
units
35mH - - - 3:1:1 Through Hole - 25.5 x 25.5 x 25mm 25mm 25.5mm 25.5mm - - -
RS Stock No. 210-6324
Mfr. Part No.PT6E
BrandOEP
HK$83.94
Each
units
3mH - 2.6Ω - 1:1+1 Through Hole - 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 173-6390
Mfr. Part No.IT253
BrandSchaffner
HK$56.61
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. 544-2471
Mfr. Part No.78250C
HK$25.86
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 163-4306
Mfr. Part No.750311592
HK$94.427
Each (On a Reel of 100)
units
8µH 0.015Ω 0.02Ω - 1:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 756-7531
Mfr. Part No.750311592
HK$121.12
Each
units
8µH 0.015Ω 0.02Ω - 1:1 Surface Mount 400nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
RS Stock No. 106-8570
Mfr. Part No.78250C
HK$22.638
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 667-5966
Mfr. Part No.LAD4613
BrandOEP
HK$60.57
Each
units
2.5mH - - - 1:1 Through Hole 0.5µH 10.16 x 8.89 x 6.35mm 6.35mm 10.16mm 8.89mm 55MHz 100kHz -
RS Stock No. 170-4970
Mfr. Part No.IT253
BrandSchaffner
HK$36.299
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. 218-9880
Mfr. Part No.SM-LP-5001
BrandBourns
HK$17.52
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. 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 -
RS Stock No. 756-7484
Mfr. Part No.750311385
HK$79.07
Each
units
15µH 0.02Ω 0.012Ω - 1.25:1 Surface Mount 200nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 800-4344
Mfr. Part No.1002C
HK$42.68
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. 756-7459
Mfr. Part No.750311624
HK$81.59
Each
units
9µH 0.034Ω 0.021Ω - 1.5:1 Surface Mount 250nH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -