• Q&A

    What's the Difference Between 2-Prong and 3-Prong RJ45 Terminals?

    The terminal (contact pin) design inside an RJ45 plug is critical to ensuring stable signal transmission, secure wire contact, and long-term performance.

    2-Prong Terminal

    Structure: Two side prongs that press against the conductor from both sides.

    Advantages:

    • Lower cost and simpler structure
    • Two prongs angled adequate for solid conductor cables, however, straight pin is used for only stranded cables.


    Disadvantages:

    • Weaker contact with stranded wires
    • Less durable under frequent insertions
    • May cause signal loss or instability over time
      　

    3-Prong Terminal

    Structure: One center prong with two side arms, providing three-point contact.

    Advantages:

    • Compatible with both solid and stranded wires
    • Stronger and more stable connection
    • Reduced insertion loss; ideal for high-speed and PoE applications
    • Higher resistance to loosening and oxidation over time


    Disadvantages:

    • Slightly higher production cost
    • Requires more precision in manufacturing
      　

    Why Choose 3-Prong Terminals?

    For modern applications such as Cat.6A, or Power over Ethernet (PoE++), 3-prong terminals are the preferred choice due to:

    • Larger contact area for better conductivity
    • More reliable connection, especially under repeated use
    • Greater compatibility across different wire types


    At Plug Master, we prioritize reliability and performance. Our RJ45 plugs with 3-prong terminals are designed to deliver consistent signal integrity and durability — a key differentiator for high-end OEM clients.