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. 163-4311
Mfr. Part No.750311599
HK$76.67
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. 715-6879
Mfr. Part No.78253/35C
HK$22.76
Each
units
0.38mH - - 1:2.27 Through Hole 1µH 9 x 9.52 x 6.35mm 6.35mm 9mm 9.52mm - - -
RS Stock No. 163-4316
Mfr. Part No.750311624
HK$56.99
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. 533-0198
Mfr. Part No.Z1656
BrandOEP
HK$53.00
Each
units
12H 63Ω 63Ω 0.8dB - Through Hole 35 mH, 35000 μH 18 x 12.7 x 18mm 18mm 18mm 12.7mm - - -
RS Stock No. 163-4310
Mfr. Part No.750311597
HK$76.67
Each (On a Reel of 125)
units
6µH 0.02Ω 0.004Ω - 3:1 Surface Mount 300nH 29.08 x 23.11 x 11.43mm 11.43mm 29.08mm 23.11mm - - -
RS Stock No. 170-4969
Mfr. Part No.IT255
BrandSchaffner
HK$32.703
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. 715-6905
Mfr. Part No.782482/53VC
HK$17.97
Each
units
260µH 600mΩ - - 1.14:1 Through Hole 8µH 9.77 x 9.14 x 6.35mm 9.77mm 6.35mm 9.14mm - - -
RS Stock No. 163-4301
Mfr. Part No.750311457
HK$48.35
Each (On a Reel of 200)
units
50µH 0.115Ω 0.012Ω - 4:1 Surface Mount 1.2µH 17.75 x 13.46 x 12.7mm 12.7mm 17.75mm 13.46mm - - -
RS Stock No. 106-8561
Mfr. Part No.782485/55C
HK$12.84
Each (In a Tube of 50)
units
513µH 0.6Ω - - 1:1.5 Through Hole 0.192µH - - 9.14mm 10.46mm - - -
RS Stock No. 170-9231
Mfr. Part No.76601/1C
HK$16.69
Each (On a Reel of 50)
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 831-9321
Mfr. Part No.ATB3225-75034CT
BrandTDK
HK$15.62
Each
units
- 0.7Ω - 2dB 3:4 Surface Mount - 3.2 x 2.5 x 2.3mm 2.3mm 3.2mm 2.5mm 100MHz 1MHz -
RS Stock No. 756-7529
Mfr. Part No.750311590
HK$105.94
Each
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. 756-7409
Mfr. Part No.750311486
HK$46.82
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 - - -
RS Stock No. 106-8565
Mfr. Part No.78253/55MC
HK$21.56
Each (In a Tube of 50)
units
0.83mH 1.5Ω - - 1:1.31 Surface Mount 1µH - - 9mm 12.7mm - - -
RS Stock No. 170-9232
Mfr. Part No.76601/2C
HK$16.69
Each (On a Reel of 50)
units
- - - - 1:1 Through Hole - 12.7 x 8.89 x 6.35mm 6.35mm 12.7mm 8.89mm - - -
RS Stock No. 173-6384
Mfr. Part No.IT255
BrandSchaffner
HK$49.55
Each
units
22mH - - - 1:1 Through Hole - 16.7 x 17.6 x 11.3mm 11.3mm 16.7mm 17.6mm - - -
RS Stock No. 106-8567
Mfr. Part No.78253/55VC
HK$27.98
Each (In a Tube of 50)
units
240µH 0.6Ω - - 1:1.31 Through Hole 8µH - - 9mm 9.52mm - - -
RS Stock No. 756-7535
Mfr. Part No.750311593
HK$118.81
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. 883-9124
Mfr. Part No.IT370
BrandSchaffner
HK$148.866
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. 756-7544
Mfr. Part No.750311594
HK$115.35
Each
units
15µH 0.035Ω 0.015Ω - 2.33:1 Surface Mount 550nH 32.31 x 27.03 x 13.69mm 13.69mm 32.31mm 27.03mm - - -
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