Telecom Transformers

HALO Electronics Telecom Transformers are for use with 56 and 64Kbps, T1/E1, E3/ DS3 and E4 applications and UL/EN60950 recognized. Their patented SMD construction provides high reliability SMD isolation modules for all leading Line Interface Units (LIUs). Isolation modules are available in Functional, Supplemental and Reinforced insulation to meet the most stringent safety requirements.

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Qty. RoHS ECAD Model Product
Type
Termination Style
Frequency Range
Inductance
Primary Impedance
Isolation Voltage
Minimum Operating Temperature
Maximum Operating Temperature
Number of Channels
Application
Package/Case
Length
Width
Height
Series
Packaging
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 6P SingleCh
Datasheet
522In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers E4/STM-01/STS-3/OC-3 16P SMD Single Ch
Datasheet
427In Stock
558Expected 4/9/2026
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 8 MHz to 240 MHz 36 uH 1.5 kV - 40 C + 85 C Dual E4/STM-1/STS-3/OC/3 Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-E4 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 6P SingleCh
Datasheet
158In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 20P Quad Ch
Datasheet
90In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Dual, Quad T1/E1 Line Interface SMD-20 15.62 mm 7.11 mm 6.35 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 Quatra SMD 40P QuadPort ISO MOD
Datasheet
153In Stock
Min.: 1
Mult.: 1

LAN Isolation Transformers Module SMD/SMT 100 kHz to 10 MHz 1.5 mH 800 mOhms 1.5 kV - 40 C + 85 C Quad T1/E1 SMD-40 27.94 mm 12.19 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 20P Quad Ch
Datasheet
338In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Dual, Quad T1/E1 Line Interface SMD-20 15.62 mm 7.11 mm 6.35 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD THT 6Pin 1:1:1 Single Ch
Datasheet
411In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module Through Hole 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface DIP-6 12.7 mm 8.89 mm 6.35 mm TD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD THT 6Pin 1:1.36CT 1Ch
Datasheet
40In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module Through Hole 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface DIP-6 12.7 mm 8.89 mm 6.35 mm TD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 6P SingleCh
Datasheet
506In Stock
Min.: 1
Mult.: 1

LAN Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD THT 6Pin 1CT:1CT 1Ch
Datasheet
237In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module Through Hole 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface DIP-6 12.7 mm 8.89 mm 6.35 mm TD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 6P SingleCh
Datasheet
100In Stock
Min.: 1
Mult.: 1
Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 Duet ISO MOD SMD 24P Dual Port
Datasheet
320In Stock
Min.: 1
Mult.: 1
Isolation Transformers Module SMD/SMT 500 nH 1.5 kV Dual T1/E1 Interface SMD-24 17.78 mm 12.19 mm 5.84 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T3/DS3/E3/STS-1 SMD 1-Port 1:2 Gullwing
Datasheet
540In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 35 uH 1.5 kV - 40 C + 85 C Single T3/DS3/E3/STS-1 Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T3 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 Quatra SMD 40P QuadPort ISO MOD
Datasheet
273In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 100 kHz to 10 MHz 1.5 mH 800 mOhms 1.5 kV - 40 C + 85 C Quad T1/E1 Interface SMD-40 27.94 mm 12.19 mm 5.84 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 MiniOctal SMD 32P 8Channel ISO MOD
Datasheet
386In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.5 mH 1.5 kV - 40 C + 85 C Quad T1/E1 Line Interface SMD-32 25.4 mm 7.62 mm 7.37 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers Co-Direct 64Kbps SMD 12P Dual Gullwing
Datasheet
208In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 20 mH 1.5 kV 0 C + 70 C Single 64kbps/DDS/DS interface SMD-12 17.15 mm 11.56 mm 8.64 mm DUALSMD-64 Tube
HALO Electronics Audio Transformers / Signal Transformers T3/DS3/E3/STS-1 SMD 1-Port 1:1 Gullwing
Datasheet
4In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 40 uH 1.5 kV 0 C + 70 C Single T3/DS3/E3/STS-1 Interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T3 Tube
HALO Electronics Audio Transformers / Signal Transformers E4/STM-01/STS-3/OC-3 16P SMD Dual Ch
Datasheet
65In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 8 MHz to 240 MHz 36 uH 1.5 kV - 40 C + 85 C Dual E4/STM-1/STS-3/OC/3 Interface SMD-16 12.7 mm 7.11 mm 5.08 mm SMD-E4 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 16P Dual Ch
Datasheet
60In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.2 mH 1.5 kV 0 C + 70 C Dual T1/E1 Line Interface SMD-16 12.7 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 6P SingleCh
Datasheet
114In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.5 mH 1.5 kV - 40 C + 85 C Single T1/E1 Line interface SMD-6 8.13 mm 7.11 mm 5.08 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD SMD GullWing 16P Dual Ch
Datasheet
36In Stock
Min.: 1
Mult.: 1

Isolation Transformers Module SMD/SMT 1.5 mH 1.5 kV - 40 C + 85 C Dual T1/E1 Line Interface SMD-16 12.7 mm 7.11 mm 6.35 mm SMD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers DIP ISOLATION MODULE T3/E3 Single StdTemp
Datasheet
Non-Stocked
Min.: 558
Mult.: 62
Isolation Transformers Module Through Hole 200 kHz to 340 MHz 40 uH 1.5 kV 0 C + 70 C Single T3/DS3/E3/STS-1 Interface DIP-6 8.13 mm 7.11 mm 5.33 mm TD-T3 Tube
HALO Electronics Audio Transformers / Signal Transformers DIP ISOLATION MODULE T3/E3 Single ExtTemp
Datasheet
Non-Stocked
Min.: 558
Mult.: 62
Isolation Transformers Module Single T3/DS3/E3/STS-1 Isolation TD-T3 Tube
HALO Electronics Audio Transformers / Signal Transformers T1/E1 ISO MOD THT 6P Single Ch StdTemp
Datasheet
Non-Stocked
Min.: 1
Mult.: 1

Isolation Transformers Module Through Hole 1.2 mH 1.5 kV 0 C + 70 C Single T1/E1 Line Interface DIP-6 12.7 mm 8.89 mm 6.35 mm TD-T1 Tube
HALO Electronics Audio Transformers / Signal Transformers T3/E3/DS3/STS-1 6P ISO MOD THT Single
Datasheet
Non-Stocked
Min.: 558
Mult.: 62
Isolation Transformers Module Single T3/DS3/E3/STS-1 Isolation TD-T3 Tube