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
PHP204.12
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
PHP181.72
Each
units
115µH 5.10Ω 2.6Ω - 2:1 Through Hole - 13 x 13 x 15mm 15mm 13mm 13mm 1MHz 3kHz -
RS Stock No. 210-6273
Mfr. Part No.OEP8000
BrandOEP
PHP279.70
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. 170-4969
Mfr. Part No.IT255
BrandSchaffner
PHP245.925
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. 196-369
Mfr. Part No.PT4
BrandOEP
PHP336.20
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. 173-6384
Mfr. Part No.IT255
BrandSchaffner
PHP281.57
Each
units
22mH - - - 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
PHP112.057
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. 161-8042
Mfr. Part No.DXW21BN7511TL
PHP29,394.00
1 Reel of 2000
Reel(s)
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS Stock No. 170-4970
Mfr. Part No.IT253
BrandSchaffner
PHP330.725
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. 163-4293
Mfr. Part No.749118205
PHP489.734
Each (In a Box of 154)
units
0.9mH 4.3Ω 26mΩ - 19:1:1 Through Hole 175µH 18 x 16.5 x 18mm 18mm 18mm 16.5mm - - -
RS Stock No. 544-2471
Mfr. Part No.78250C
PHP186.88
Each
units
2mH - 1:1 Through Hole 3µH 9 x 10.19 x 6.35mm 6.35mm 9mm 10.19mm - - Enclosed
RS Stock No. 106-2888
Mfr. Part No.DXW21BN7511TL
PHP23.731
Each (In a Pack of 10)
units
- - - 1dB - Surface Mount - - - 2mm 1.2mm 870MHz 50MHz Enclosed
RS Stock No. 883-9124
Mfr. Part No.IT370
BrandSchaffner
PHP1,158.935
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. 218-9880
Mfr. Part No.SM-LP-5001
BrandBourns
PHP109.14
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. 756-7383
Mfr. Part No.7491182112
PHP351.83
Each
units
0.9mH 94mΩ - 9.5:1:1 Through Hole 112µH 24.5 x 20.2 x 16.5mm 16.5mm 24.5mm 20.2mm - - -
RS Stock No. 173-6390
Mfr. Part No.IT253
BrandSchaffner
PHP370.48
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. 163-4294
Mfr. Part No.7491182112
PHP489.731
Each (In a Tray of 108)
units
0.9mH 94mΩ - 9.5:1:1 Through Hole 112µH 24.5 x 20.2 x 16.5mm 16.5mm 24.5mm 20.2mm - - -
RS Stock No. 756-7373
Mfr. Part No.749118205
PHP372.98
Each
units
0.9mH 4.3Ω 26mΩ - 19:1:1 Through Hole 175µH 18 x 16.5 x 18mm 18mm 18mm 16.5mm - - -
RS Stock No. 106-8570
Mfr. Part No.78250C
PHP134.202
Each (In a Tube of 50)
units
2mH - 0.042361111111 Through Hole 3µH - - 9mm 10.19mm - - Enclosed
RS Stock No. 756-7531
Mfr. Part No.750311592
PHP623.93
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 - - -
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