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. 162-0595
Mfr. Part No.IT243
BrandSchaffner
HK$36.299
Each (In a Box of 200)
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. 831-9327
Mfr. Part No.ATB3225-75032CT
BrandTDK
HK$16.09
Each
units
- 0.7Ω - 2dB 3:2 Surface Mount - 3.2 x 2.5 x 2.3mm 2.3mm 3.2mm 2.5mm 100MHz 5MHz -
RS Stock No. 106-8557
Mfr. Part No.1001C
HK$37.821
Each (In a Tube of 30)
units
3mH 1.2Ω - 1:1 PCB Mount 22µH - - 15.06mm 15.06mm - - -
RS Stock No. 167-4913
Mfr. Part No.DXP18BN5014TL
BrandMurata
HK$2.699
Each (On a Reel of 5000)
units
- 50Ω 200Ω 1.5dB 1:2 Surface Mount - 1.6 x 0.8 x 0.45mm 0.45mm 1.6mm 0.8mm 870MHz 50MHz -
RS Stock No. 715-6894
Mfr. Part No.78253/55MVC
HK$30.82
Each
units
240µH 0.6Ω - - 1:1.31 Surface Mount 8µH 9 x 12.7 x 6.55mm 6.55mm 9mm 12.7mm - - -
RS Stock No. 756-7474
Mfr. Part No.750311439
HK$64.24
Each
units
37µH 0.089Ω 0.028Ω - 2:1 Surface Mount 750nH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
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. 210-6330
Mfr. Part No.PT10E
BrandOEP
HK$73.15
Each
units
- 5.1Ω 2.6Ω - 2:1 Through Hole 115µH 15 x 15 x 16mm 16mm 15mm 15mm 1MHz 3kHz -
RS Stock No. 163-4316
Mfr. Part No.750311624
HK$59.745
Each (On a Reel of 200)
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 - - -
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. 163-4311
Mfr. Part No.750311599
HK$82.12
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. 162-1335
Mfr. Part No.750311590
HK$90.563
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. 173-6356
Mfr. Part No.IT242
BrandSchaffner
HK$56.61
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. 210-6318
Mfr. Part No.PT4E
BrandOEP
HK$77.94
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. 106-8563
Mfr. Part No.78253/35MC
HK$22.638
Each (In a Tube of 50)
units
0.38mH - - 1:2.27 Surface Mount 1µH - - 9mm 12.7mm - - -
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. 106-8817
Mfr. Part No.76250ENC
HK$39.26
Each (In a Tube of 30)
units
2mH - - 1:1 Through Hole 40µH - - 15mm 15mm - - -
RS Stock No. 170-4969
Mfr. Part No.IT255
BrandSchaffner
HK$34.409
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. 756-7412
Mfr. Part No.750311305
HK$92.92
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. 163-4320
Mfr. Part No.750311771
HK$98.564
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 - - -