WHSQ48802C2 2.5G/5GBASE-T 4PPoE LAN Transformer

The WHSQ48802C2 specifies insertion loss, return loss, crosstalk and common-mode rejection only to 200 MHz, where most parts in this range are specified to 250 MHz. What that boundary means in practice is the scope of your sign-off evidence: a link margin analysis can cite the WHSQ48802C2 limits up to 200 MHz and no further, and figures taken from other parts in the range cannot be used to fill the gap.

Where the project needs limits out to 250 MHz, the WHSQ48802C1 is the direct alternative to the WHSQ48802C2, in the same package, with the same pin assignment and the same PoE rating.

Size the copper of the WHSQ48802C2 for 1200 mA per magnetic channel. The datasheet states PoE Support 60W and gives the current per channel: each channel supports 1200 mA of DC balance current. Route the eight centre-tap paths as eight balanced paths of that rating and calculate the width from your actual copper thickness and permitted rise.

The datasheet publishes no port-level total for the WHSQ48802C2, so keep the per-channel figure as the copper basis and route each port's four paths as its own group. No wattage available at the PD can be derived from the current – 60 W is the device-side rating.

Choose on the current each channel has to carry: the WHSQ48802C2 carries 1200 mA per magnetic channel at a stated PoE Support 60W, while the WHSQ48002P1 carries 360 mA per channel at a stated PoE Support 30W. Both operate from -40 °C to +85 °C with the temperature rise included and share the same isolation test.

They do not share a footprint: the WHSQ48802C2 stands 11.70 mm tall against 7.50 mm for the WHSQ48002P1, and neither the body outline nor the pad layout is common, so check each against your board and enclosure. Both are listed in the 2.5G/5G BASE-T range.