What This RJ45 Jack Does in the Assembly
The TE Connectivity 5-2337992-3 is a single-port RJ45 jack built for 10/100 Base-T and Power over Ethernet (PoE) applications. It routes four signal pairs through a shielded body with integrated EMI fingers, which bleed common-mode noise to the chassis ground before it reaches the PHY.
Shielding and EMI Protection
The brass shield carries EMI fingers that contact the mating plug's shell, creating a low-impedance path for conducted emissions. In a 10/100 Base-T link with PoE, the shield prevents the switching noise from the power supply from coupling into the differential pairs. The tab direction is up, which means the latch on the mating RJ45 plug faces the top of the jack — a detail that matters when routing cables in a dense panel.
Contact Finish and Durability
The gold layer also resists corrosion in industrial environments where humidity or airborne contaminants are present.
LED Indication and Operating Range
A green-yellow bicolor LED provides link/activity indication — the green side typically signals a valid link, yellow flashes for activity. The liquid crystal polymer (LCP) housing handles the reflow temperatures of the through-hole solder process without warping.