WHSG48603PTG Gigabit PoE+ LAN Transformer

Because adjacent channels are coupled by design: the WHSG48603PTG drawing pairs the cable-side common-mode chokes of neighbouring channels, and the electrical item is written to match as Cross Talk (Adjacent Channels).

The -30 dB Min figure is therefore stated specifically between adjacent channels rather than as a general channel-to-channel number. Read the link budget on that basis; where the design also has a defined requirement between non-adjacent channels, tell us and we will confirm it. Other parts in the 100/1000 BASE-T range state cross talk without that qualifier.

Package, pinout, PoE rating and every electrical value are identical, so the choice is purely structural: take the WHSG48603PTG for coupled cable-side chokes between adjacent channels, or the WHSG48601-2PTG for eight fully independent channels.

The decision follows the target PHY's reference design and the EMC result on the finished unit, not a better or worse number — the parameter table shows no difference at all. Either will fit a finished board, but the structure has changed and EMC has to be re-measured.

Dual Gigabit port 802.3at powered equipment where the component temperature can reach -40 °C or +85 °C.

The WHSG48603PTG states 720 mA current capability, suitable for IEEE 802.3at, and annotates its operating range as including the part's own temperature rise. The part is surface-mount, MSL 1, assembled by reflow, with a 9.95 mm body — noticeably taller than the non-PoE parts on the same land pattern, so slim chassis need the clearance checked first. Lower-profile options sit in the 100/1000 BASE-T range.