634108149621 8P8C RJ45 Vertical SMT WR-MJ Cat 3 Modular Jacks

The 634108149621 WR-MJ Cat 3 Modular Jack is a single-port 8P8C vertical SMT RJ45 connector designed for reliable Ethernet connectivity in networking and embedded electronic systems.

Developed by Würth Elektronik, this modular jack belongs to the WR-MJ series and supports Category 3 Ethernet applications while maintaining compatibility with higher network categories under certain conditions.

With tape-and-reel packaging, soldering tab reinforcement, and reflow-compatible UL94-V0 housing, the connector is optimized for automated SMT assembly and stable long-term electrical performance.

It is widely used in network devices, IoT equipment, and smart building infrastructure requiring compact and reliable Ethernet interfaces.

The 634108149621 Cat 3 RJ45 Modular Jack is designed to provide stable electrical performance for Ethernet and communication interfaces.

Key electrical characteristics include:

• 1.5 A rated current capacity, ensuring reliable signal and power transmission.
• 120 V AC working voltage, suitable for standard network equipment.
• 1000 V AC dielectric withstand capability, providing strong insulation protection.
• Low contact resistance (≤20 mΩ) to maintain signal integrity.
• High insulation resistance (≥500 MΩ) for improved electrical isolation.

The tape-and-reel packaging allows high-speed pick-and-place assembly, improving manufacturing efficiency in large-volume electronics production.

The integrated soldering tab enhances mechanical stability, ensuring secure attachment to the PCB during operation and repeated cable insertion.

The WR-MJ modular jack family offers multiple configuration options including:

• Shielded or unshielded versions
• Integrated EMI springs
• Optional LED indicators
• Vertical or horizontal mounting orientations

This flexibility enables engineers to adapt the connector to a wide range of network device designs.

• 8P8C RJ45 modular jack
• Vertical surface-mount (SMT) design
• Single port (1×1) configuration
• Soldering tab for improved PCB retention
• Shieldingless plastic housing
• Tape & Reel packaging for automated pick-and-place
• Reflow-compatible UL94-V0 insulator
• UL and cULus certified
• Designed for Cat 3 Ethernet applications