WHSM48702G 10GBASE-T LAN Transformer

The WHSM48702G is a 10G BASE-T transformer in a 48-pin dual-port package, so one device covers two ports. Its electrical limits are written the 10G way: segmented insertion and return loss defined out to 500 MHz, with crosstalk and common-mode rejection quoted from 1 to 500 MHz.

A Gigabit part is not specified like that. Running the WHSM48702G on a Gigabit link is fine, but comparing it against Gigabit parts on price or specification is not a like-for-like comparison. The full speed class is listed in the 10G BASE-T range.

No. The datasheet assigns no DC balance current capability to the centre taps of the WHSM48702G, so the taps on neither port can be used as a supply path. The WHSM48702G provides signal transformation and isolation for two 10G BASE-T ports, and the ports are powered by the equipment itself.

If either port has to deliver power, the WHSM48702P2 is the direct counterpart in the same 48-pin dual-port format and publishes a DC balance current of 1200 mA per magnetic channel.

There is no electrical difference to choose on: operating and storage temperature, OCL, DCR, segmented insertion and return loss, crosstalk, common-mode rejection and the isolation test are the same on the WHSM48702G and the WHSM48701G, and both are non-PoE 48-pin dual-port 10G parts. The decision therefore sits outside the electrical block.

Check pin assignment and package dimensions against each drawing, because a matching pin count is not evidence of interchangeability. Otherwise decide on availability and on what is already in the bill of materials, and confirm with us before listing the WHSM48702G as a substitute for the other part.