Six-channel rail-to-rail clamp for Ethernet ports
The Texas Instruments TPD6E004RSER is a steering (rail to rail) TVS diode array packing six unidirectional channels into an 8-UFQFN package measuring 1.5x1.5 mm. It is designed specifically for Ethernet port protection, clamping transients on signal lines to the supply rails. With a reverse standoff voltage of 5.5V (max) and a minimum breakdown voltage of 6V, it sits on 3.3V or 5V Ethernet PHY interfaces without leaking.
Channel count and package — what fits your BOM
Six unidirectional channels protect three differential pairs — exactly what 100BASE-TX or 1000BASE-T Ethernet needs per port. One TPD6E004RSER covers one RJ45 jack's worth of signal lines, keeping the BOM count low. The 8-UQFN (1.5x1.5 mm) footprint is small enough to tuck under the magnetics or near the connector.