The EMI finger on the shield bleeds chassis noise before it couples into the signal pairs — a detail that matters when the jack sits near a switching supply or a display interface.
Rated Cat5, this jack supports 100 MHz signaling — enough for 100BASE-TX and 1000BASE-T in a controlled industrial environment. The shielded body with integrated EMI finger mates with a shielded RJ45 plug to complete the ground path around the twisted-pair cable. Without that shield continuity, the common-mode rejection of the differential pair drops and the link margin erodes in a noisy plant-floor run.
Right-angle orientation means the jack sits parallel to the PCB, plugging from the board edge. The through-hole solder tails anchor into plated through-holes — no reflow-profile sensitivity like an SMT shield.