WHSG50002PTG Gigabit PoE LAN Transformer

The datasheet states IEEE 802.3af compliant performance with 350 mA current capability — the original PoE class, where the PSE port tops out at 15.4 W.

For 802.3at (PoE+) or 802.3bt supply the WHSG50002PTG is not the right part. When budgeting port power, tell us the per-port current you are targeting and VOOHU will confirm the applicable scope against the current controlled document. Higher-class parts sit in the 100/1000 BASE-T range.

PoE class, package, pin net names and temperature grade all match; what differs is how the PoE line is written — the WHSG50001TG states that the 350 mA is a per-channel DC balance current, while the WHSG50002PTG states 350 mA current capability without naming the scope.

Every other electrical item matches value for value and the two share one land pattern. Where the design needs the per-channel basis spelled out, the WHSG50001TG datasheet gives it directly.

Entering from the pin 1–25 side (TCT/TD), the signal passes the 1CT:1CT transformer first and the common-mode choke second, then reaches the pin 26–50 side (MCT/MX).

The WHSG50002PTG holds eight 1CT:1CT units in total, four channels to each of two Gigabit ports. Fix the orientation from where the PHY and the RJ45 actually sit on the board, read against the net names. Other parts in the 100/1000 BASE-T range print their side labels directly on the drawing.