WHDG24101G Gigabit LAN Transformer

Indoor Gigabit data ports with a component temperature between 0 °C and +70 °C, on boards that can host a 24-pin, 2.0 mm pitch through-hole footprint. The WHDG24101G is a single-port 100/1000 BASE-TX DIP transformer without PoE, so the port needs local power.

A 2.0 mm pitch is on the wider side for through-hole parts, which eases hole-position tolerance and insertion alignment but takes more board area – confirm the space first on low-profile or high-density boards. Other options are in the 10/100/1000 BASE-T range.

No. The datasheet assigns no DC balance current capability to the centre taps of the WHDG24101G, so they cannot be used as a supply path. Terminate them according to the reference design for the target PHY.

If the same board later needs PoE, the WHDG24102PTG is a 24-pin DIP part that does carry a PoE current statement and can be evaluated.

Lay out the 24-pin, 2.0 mm pitch hole pattern first, then settle the wave-solder process and how tubes are fed to the line. The WHDG24101G ships in tubes of 32 pcs, 1600 pcs per inner carton and 6400 pcs per export carton, in 530 mm tubes.

Round purchase quantities to whole tubes and plan line-side replenishment in tubes, since part-tube quantities create waste. Insertion support and thermal shadowing during wave soldering are worth listing as first-article checks.