5554990-1 is a single port modular jack designed for Cat 3 performance in data communications applications. This vertical through-hole mount connector features 6 positions with 6 contacts, a height of 16.51 mm, and a tail length of 3.81 mm. The jack includes panel stops and an offset latch feature for secure panel mounting, with top entry PCB mount orientation. It is unshielded and does not include LEDs or grounding options. This modular jack is suitable for voice, data, and networking applications in communications equipment, telephones, routers, and business equipment.