This jack is rated Cat3, meaning it's built for 10BASE-T Ethernet and voice-grade applications, not for Gigabit or higher data rates.
The Cat3 rating caps this jack at 16 MHz signal bandwidth, suitable for 10BASE-T Ethernet and analog phone lines. If you're routing 100BASE-TX or PoE, you need a Cat5e or higher jack — the unshielded construction and contact geometry here won't hold the impedance and crosstalk margins at 100 MHz. The 50.0µin gold finish gives you 750+ mating cycles before the contact resistance drifts, so it's a solid choice for field-serviceable panels where the cable gets swapped quarterly.
Board Layout Notes
The tab direction is down — the latch on the RJ45 plug clicks downward, which is standard for most vertical-panel cutouts.