Modular Jack Connector

A modular jack connector is the board-mounted receptacle an Ethernet or telephone plug latches into — an RJ45 (8P8C) or RJ11 (6P6C / 4P4C) housing carrying the contact set, and on integrated types the isolation magnetics as well. TeleWire Technology manufactures 565 of them in Taiwan.

  • Integrated or not — 449 carry the transformer in the shell; 116 leave isolation on the PCB.
  • Speed — 10/100 Base-T through 10G, including 2.5G and 5G over installed Cat5e.
  • Form factor — right-angle, vertical (180°), low-profile, and stacked arrays to 2x8.
  • Power — PoE, PoE+ and PoE++ to IEEE 802.3af, 802.3at and 802.3bt.

Most parts publish equivalents from Halo, Bel Fuse, Pulse, Würth Elektronik, TE Connectivity and Amphenol, so a second source can be qualified against a footprint already on your board. Samples and mechanical drawings are available.

Modular jack connector RJ45 shielded PoE 100Mbps to 10Gbps, TeleWire Technology
Product Catalog

Modular Jacks by Category

Integrated RJ45 Connector

Integrated RJ45 Connector

RJ Connector With Magnetics

Explore Series
Discrete RJ45 Connector

Discrete RJ45 Connector

Non-integrated RJ45 Connector

Explore Series
Vertical RJ45 Connector

Vertical RJ45 Connector

Top Entry (180°)

Explore Series
Stacked/ Multi-port RJ45 Jack

Stacked/ Multi-port RJ45 Jack

2xN, 1xN Ganged

Explore Series
Low Profile RJ45 Connector

Low Profile RJ45 Connector

Mid-Mount / Sunk

Explore Series
ISO 9001:2015
Certified Quality
Taiwan Factory
Direct Manufacturing
US Technical Sales
Direct Engineering Support
TE Connectivity Alternative
Cross-Reference Support

Can't Find The RJ Connector You Need?

Our website lists only a fraction of our capabilities. We manufacture thousands of modular jacks not shown online. Upload your drawing or specs here, and we will conduct the cross-reference for you.

Flexible Gold Plating Options (Flash to 50u")
High-Speed Signal Integrity
High-Power PoE/PoE++ Capabilities
Pin-to-Pin Cross Compatibility
Same-day engineering review
Request for Quote

We reply within 24 hours. No account needed. Your specifications stay confidential; NDA available on request.

Industry Applications

Proven Performance Across Industries

Industrial Automation

Ruggedized vertical and shielded jacks for PLCs, HMIs, and Industrial PCs.

IP Surveillance & Security

High-reliability PoE and PoE++ connectors capable of powering 4K IP cameras, NVRs, and access control systems over a single Ethernet cable.

Consumer Electronics

Cost-effective discrete and low-profile jacks for Set-Top Boxes, Game Consoles, and Smart TVs.

Security & Surveillance

PoE-capable MagJacks for IP Cameras and NVR systems.

Medical Devices

High-reliability jacks with isolation transformers for patient monitoring equipment.

Medical Instrumentation

High-reliability jacks with isolation transformers for patient monitoring equipment.

Why Choose Our Modular Jack?

Taiwan-Made Precision Engineering

Unlike generic commodity connectors, our jacks are engineered in Taiwan with high-precision stamping and molding to ensure consistent mechanical stability.

Comprehensive Range (ISO 9001 Certified)

From standard Cat5e discrete jacks to complex 10G PoE++ integrated modules, we manufacture the entire spectrum of RJ45 solutions in our Taiwan facilities.

Direct Cross-Reference Capabilities

We provide pin-to-pin compatible replacements for TE Connectivity, Amphenol, Pulse, Belfuse, and Molex, helping you secure your supply chain and reduce BOM costs.

Customization Expert

We support custom modifications including LED color changes, selective gold plating (up to 50u"), special EMI finger configurations, and custom pinouts.

Why Choose Our Modular Jack?

Technical FAQs

Common questions from procurement and engineering teams.

What types of Modular Jack Connectors do you manufacture?

We manufacture a complete range of PCB-mount modular jacks, including Integrated (MagJack), Discrete (Non-Integrated), Vertical (Top Entry), Multi-port (Ganged/Stacked), Low-Profile (Sunk), and RJ45+USB Combo jacks. We support speeds from 10/100 Base-T to 10G Base-T.

Can you cross-reference major brands like TE, Amphenol, or Pulse?

Yes. A core part of our service is providing high-quality, Taiwan-made alternatives to major brands. We can cross-reference part numbers from TE Connectivity, Amphenol, Molex, Pulse Electronics, Belfuse, and Wurth, often offering shorter lead times and better cost structures.

Do you offer custom RJ45 configurations for specific LED or shielding requirements?

Absolutely. We offer customization for LED colors, housing dimensions, gold plating thickness (up to 50u"), shield EMI finger configurations, and specific internal magnetic schematics to match your PHY chip requirements.

Do you offer samples for testing and validation?

Yes, we support OEM/ODM projects with samples for engineering validation. For standard "catalogue" parts, samples can often be shipped within 48 hours. For custom specifications (e.g., specific LED colors or magnetics), we can produce prototypes quickly due to our in-house engineering in Taiwan.

What is the standard lead time for modular jacks?

For standard stock items, we can ship immediately. For volume production orders, our typical lead time is 4-6 weeks, which is significantly faster than the current industry average for major brands. Expedited services are available for urgent NPI builds.