WHSG50009G Gigabit LAN Transformer

No. The WHSG50009G datasheet carries no PoE current item, so both ports are powered locally on the board.

Its centre taps serve as AC termination and common-mode reference only. Where power over the cable is needed, PoE-rated parts exist on the same 50-pin land pattern and the change costs no PCB work if it is made at selection time — they are listed in the 100/1000 BASE-T range.

The body is 8.35 mm ±0.50 mm high, 27.80 × 7.60 mm in plan and 10.80 mm across the leads.

The WHSG50009G is surface-mount, with coplanarity across 50 terminations held to 0.10 mm, a 1.15 mm foot and a 0° to 8° lead angle; it is reflow-assembled and supplied on tape. The 48-pin surface-mount dual-port parts in the 100/1000 BASE-T range stand 7.50 mm Max — lower but wider — which is worth comparing where internal clearance is tight.

No. Within this package family the WHSG50009G uses its own pin assignment: pin 1 is the centre tap TCT1 and pin 2 is TD1+, while the other 50-pin parts on the same land pattern put TD1+ on pin 1 and TCT1 on pin 2.

The swap runs through all eight channels and the cable side is transposed to match. The land pattern is identical, so either type will place and no machine will flag it — the problem shows up in the routing, where a board drawn to the other assignment lands a differential line on a centre tap. Check the pinout pin by pin against this part's own drawing rather than reusing a table from another part in the 100/1000 BASE-T range.