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1000Base-T LAN Transformer Modules 24Pin SMT 350uH TG24118S1

1000Base-T LAN Transformer Modules 24Pin SMT 350uH TG24118S1

The TG24118S1 is a 1000Base-T LAN Transformer Modules component providing quad-channel magnetic isolation for Gigabit Ethernet physical layer interfaces.

With a 24-pin surface-mount single-port configuration and 350 uH minimum open-circuit inductance, this module delivers reliable signal coupling, EMI suppression, and high-voltage isolation for networking equipment, industrial automation, and embedded computing systems.

  • Part Number :

    TG24118S1
  • Product Category :

    LAN Magnetics

Product Overview

The 1000Base-T LAN Transformer Modules model TG24118S1 is a 24-pin SMT single-port isolation transformer rated for 1000 Mbps Ethernet operation. Each of the four channels features a 1CT:1CT turns ratio with center-tapped windings supporting full-duplex bidirectional data transmission per IEEE 802.3ab.

The module integrates common-mode chokes for superior EMI suppression and achieves a minimum 350 uH OCL at 100 kHz with 8 mA DC bias. Constructed with LCP UL94 V-0 housing and RoHS-compliant materials, the TG24118S1 delivers 1500 VAC hipot isolation between the primary and secondary sides.

Its compact SMT footprint enables automated assembly and is compatible with standard Gigabit Ethernet PHY reference designs from major chipset vendors.

 

Product Specifications / Attributes

Attribute

Value

Product Model

TG24118S1

Manufacturer

VITALCONN Electronics

Product Category

24 pin SMT magnetics LAN Transformer Modules

Ethernet Standard

1000Base-T (IEEE 802.3ab)

Number of Ports

1 (Single Port)

Number of Pins

24

Turns Ratio

1CT:1CT (±3%)

OCL (Open Circuit Inductance)

350 uH Min @ 100 kHz, 100 mV, 8 mA DC Bias

Insertion Loss

-1.0 dB Max (1 to 100 MHz)

Return Loss

-16 dB Min (1 to 30 MHz); -12.5 dB Min (30 to 60 MHz); -10 dB Min (60 to 100 MHz)

Cross Talk

-45 dB Min (1 to 40 MHz); -40 dB Min (40 to 80 MHz); -33 dB Min (80 to 100 MHz)

DCMR (Differential to Common Mode Rejection)

-43 dB Min (1 to 60 MHz); -37 dB Min (60 to 100 MHz)

HIPOT Isolation

1500 VAC (Transformer Primary to Secondary)

Mounting Type

Surface Mount (SMT)

Operating Temperature

0 to 70 °C

Housing Material

LCP (UL94 V-0)

RoHS Compliance

Yes

 

Features&Benefits

  • 1000Base-T Gigabit-Ready Magnetics: Meets IEEE 802.3ab electrical requirements for 1000 Mbps Ethernet, providing signal isolation, impedance matching, and common-mode noise suppression.
  • 350 uH Minimum OCL with DC Bias: Maintains high inductance under 8 mA DC bias current, ensuring stable low-frequency response essential for Gigabit Ethernet baseline wander compliance.
  • Quad 1CT:1CT Channel Architecture: Four independent center-tapped transformer channels enable full-duplex communication across all four twisted pairs simultaneously for true gigabit throughput.
  • 1500 VAC HiPot Protection: Robust transformer isolation barrier protects PHY transceivers from ground loop currents, electrostatic discharge, and common-mode voltage transients.
  • Industry-Standard 24-Pin SMT Footprint: Drop-in compatible with major PHY reference designs, simplifying PCB layout and reducing design cycle time for networking products.
  • Integrated CMC on All Channels: Built-in common-mode chokes attenuate radiated and conducted EMI, helping products pass FCC/CE EMC compliance testing with fewer external filter components.
  • LCP UL94 V-0 Rated Housing: High-temperature liquid crystal polymer withstands reflow soldering and maintains mechanical integrity across the full operating temperature range.
  • RoHS Compliant Manufacturing: All materials and processes meet RoHS directive requirements for lead-free electronic component production.

 

Packing Details

If you need detailed information about our packaging specifications and requirements, please feel free to contact us directly. We will be happy to provide you with the details.

 

Applications

  • Enterprise and SMB Gigabit network switches
  • Multi-port router and gateway boards
  • Industrial Ethernet switches for factory automation
  • Embedded computing and IoT gateway modules
  • PoE-capable networked device mainboards (consult for PoE variants)
  • Wireless access point and controller circuit boards
  • Network-attached storage (NAS) and media server systems

 

Frequently Asked Questions (FAQ) 

  • Q: Is the TG24118S1 pin-compatible with other 1000Base-T LAN Transformer Modules?
  • A: Yes, the TG24118S1 uses the industry-standard 24-pin SMT footprint commonly adopted by major Gigabit Ethernet PHY reference designs. However, pin-to-pin compatibility should always be verified against the target PHY datasheet before layout, as subtle differences in center-tap connections or channel mapping may exist between transformer vendors.
  • Q: What is the difference between TG24118S1 and TG24107S1 LAN Transformer Modules?
  • A: Both models are 1000Base-T single-port 24-pin SMT LAN Transformer Modules with 1CT:1CT turns ratio and 1500 VAC hipot isolation. The primary difference lies in subtle electrical parameter variations such as return loss performance across frequency sub-bands. The -07 and -18 model suffixes correspond to different customer part numbers and may have minor differences in insertion loss or crosstalk specifications. Please refer to the individual product datasheets for exact parameter comparisons.
  • Q: Does the TG24118S1 support Auto MDI/MDI-X crossover detection?
  • A: The TG24118S1 is a passive magnetic module that provides transformer isolation and common-mode filtering. Auto MDI/MDI-X crossover detection is a function performed by the Ethernet PHY transceiver chip, not by the transformer module. The TG24118S1's 1CT:1CT turns ratio and center-tapped topology are fully compatible with PHY chips that implement Auto MDI/MDI-X functionality.

 

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