1. What Is a Single-Port RJ45 Connector?

A single-port RJ45 connector is a standard female Ethernet jack containing one Ethernet port (sometimes called 1×1 or single-port). It follows the 8P8C format (8 positions, 8 contacts), the universal connector configuration for network cabling such as Cat 5e, Cat 6, and beyond.

These connectors are used to connect one Ethernet link per connector and come in varieties like through-hole, surface-mount (SMT), right-angle, shielded or unshielded, and optionally with integrated magnetics and LED indicators

Features and Uses of a Single-Port RJ45 Connector

Aspect

Benefit

Signal Integrity

Gold-plated contacts support high data rates and prevent signal loss.

Shielding

Enhanced shielding reduces interference, boosting network reliability.

2. Main Features & Specifications

Feature

Details

Port Configuration

1 × 1 port (single RJ45 jack)

Connector Type

8P8C modular jack supporting Cat 5e/Cat 6/Cat 6a

Shielding Options

Available in shielded or unshielded versions

Mounting Styles

Through-hole solder or press-fit, SMT surface mount, right-angle tab-down or up

Integrated Magnetics

Optional magnetics support (MagJack) with PoE/PoE+/PoE++ according to IEEE 802.3 standards

LED Indicators

Can include Green/Yellow link/activity LEDs for status feedback

Operating Speeds

Support 10/100BASE‑T, 1000BASE‑T, and up to 5G/10G in advanced models

RoHS / UL Compliance

Most connectors meet RoHS and UL specifications for safety and environmental standards

Temperature Range

Typical −40 °C to +85 °C for industrial use, some support up to +105 °C

3. LINK‑PP Single-Port RJ45 Options

LINK‑PP offers a comprehensive portfolio of single-port RJ45 connectors, covering speeds from 10/100 Mbps up to 10G Base-T. Their single-port models include traditional and smart MagJacks with PoE support, LED indicators, and a variety of mounting styles.

An example product:

  • LPJG4928HENL: A 1×1 port, 1000Base-T (Gigabit RJ45) MagJack with integrated magnetics and PoE+ support. It features Green/Yellow LEDs, a down‑tab orientation, through‑hole mounting, and operates between –40 °C and +85 °C. It is RoHS‑compliant but does not include EMI grounding tabs.

4. Technical Background & Industry Insights

  • 8P8C Format: RJ45 connectors use the standard 8P8C design with eight conductive pins aligning with the Ethernet cable's eight wires, enabling full gigabit speeds across four twisted pairs.

  • Shielding Needs:

    • Shielded connectors must match shielded cables to maintain continuous ground shielding and ensure EMI protection.

    • Using shielded connectors on unshielded cable yields no benefit and may cause fitment issues.

  • Integrated Magnetics (MagJack):

    • Modules with built-in transformers provide embedded isolation, support PoE and EMI suppression, and simplify PCB design.

  • Mounting Orientation: Right-angle (tab-down/up) connectors help optimize PCB layout and panel fit, and choices depend on board assembly processes and form factor requirements.

5. Use Cases & Evaluation Tips

Typical Applications:

  • Embedded board sockets for network modules

  • Industrial controllers and communication equipment

  • Single‑port switches, gateways, or routers

  • PoE‑powered devices like IP cameras and access points

Selection Checklist:

  1. Speed requirement: Choose Cat 5e (1000Base‑T) or higher rated modules.

  2. Need for PoE: If powering devices via Ethernet, choose a MagJack with PoE support.

  3. LED feedback: Useful in network panels and indicators.

  4. Cable shielding: Match shielded connectors to shielded cable infrastructure.

  5. Mounting type: Select based on board design—THT or SMT, tab orientation.

  6. Environmental needs: Choose industrial-grade ratings if operating beyond commercial temperature range.

6. Summary

A single-port RJ45 connector (1×1 port) is a foundational networking component, supporting Ethernet connections at speeds from Fast Ethernet up to 10G Base-T. Many models integrate magnetics and support PoE, offering options for shielded/unshielded mounting and LED indicators for diagnostic feedback.

LINK‑PP’s single-port connectors provide solid reliability, RoHS compliance, and PoE integration in a range of physical formats and performance levels.

See Also

Common Applications And Uses Of RJ45 Connectors

A Guide To Important Specs Of Integrated RJ45 Connectors

LINK-PP’s LPJU3102ABNL RJ45 USB Combo For Base-T Networks

Top Reasons To Select LINK-PP Integrated RJ45 Connectors

Frequently Asked Questions Regarding LINK-PP PoE RJ45 Connectors