WHSG24002G Single Port SMD Gigabit Base-T PIN24 non-PoE Lan Transformer
For technical assistance, please click the button below to add customer service or visit the sample request page to fill out the form. We will serve you as soon as possible.
Technical Support Email: fae.thorne@voohu.cn Phone: +86 400-1048-018
For more details, please visit the Download Center to get documents or click the button below to add customer service. We will serve you as soon as possible.
For small-volume orders, you can place orders directly on VOOHU Shop. We support VAT general/special invoices with a convenient and efficient process.
For technical assistance or sample requests, please click the button below to add customer service or visit the sample request page to fill out the form. We will serve you as soon as possible.
Customer Service Email: song.lei@voohu.cn Phone: +86 180 2130 1120
A LAN transformer is a passive magnetic component whose core functions are electrical isolation, impedance transformation, signal transmission, and common-mode noise suppression. It does not itself distinguish between voltage or current modes; its operation depends entirely on the PHY chip it is connected to and the surrounding circuitry.
On the TX side, the CT works with a standard Bob Smith circuit (a 75Ω resistor in parallel with a 1000pF capacitor, then to protective ground) to suppress common-mode interference. On the RX side, the CT must be configured strictly per the PHY datasheet—it can be tied to the power supply, grounded through a capacitor, or grounded directly, but must never be left floating. In gigabit applications, avoid directly grounding both the TX and RX CTs at the same time, otherwise EMI can easily exceed limits and isolation can fail.
A 10G LAN transformer cannot meet the 100m transmission requirement at 100M/1000M, because there is a fundamental mismatch between the inductance design of LAN transformers for different rates and the needs of their respective transmission scenarios.
A 10G LAN transformer targets high-frequency transmission, aiming to preserve high-frequency signal integrity. To reduce copper losses at high frequencies and optimize S-parameters (such as insertion loss and return loss), it adopts a "low-inductance design," with an actual inductance typically only around 100-plus μH. However, 100m transmission at 100M/1000M has a clear minimum inductance requirement—industry standards call for 350μH or more. Only sufficient inductance can suppress signal attenuation over long distances, ensure interference immunity, and guarantee stable transmission.
Precisely because the 10G LAN transformer's inductance (~100-plus μH) is far below the 350μH minimum required for 100m transmission at 100M/1000M, the signal suffers excessive attenuation and reduced interference immunity due to insufficient inductance, ultimately causing the test to fail (NG).
You can request test reports by clicking "Contact Us" on the VOOHU official website.
