Lumopt Lumopt

China Wholesale Wired Network Connector Factory & Suppliers

High-Speed Ethernet & Optical Transceiver Interconnect Architectures for Global Enterprise Networks, Telecom Infrastructure, and AI Compute Clusters

Wired Connectivity Showcase: Featured Products

Engineered to meet the stringent mechanical and electrical thresholds of global telecom operators and enterprise cloud environments.

J0G-0001NL Ethernet Low Profile RJ45 Connector

J0G-0001NL 10/100/1000 Base-t Tab up Ethernet Low Profile RJ45 Connector With Leds

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RJHSE-5085 RJ45 Female Connector

RJHSE-5085 without Transformer Jack RJ45 Female Connector

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Single Port Ethernet Female Jack RJ45 Connector

Single Port Ethernet Female Jack RJ45 Connector 7499161005A

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USB 3.0 Ethernet Modular RJ45 Connector

43F-1201DYD2NL 7497011611 8211-1X1T-36-F Single Port USB 3.0 Ethernet Modular RJ45 Female Connector

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Dual USB RJ45 Modular Jack

With Dual USB 10/100 Base-T With Leds RJ45 Modular Jack LPJU5125BONL

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QSFP+ 40GBASE-SR BiDi Optical Transceiver Module

QSFP+ 40GBASE-SR BiDi 300m Multi Mode Duplex LC Optical Transceiver Module QSFP-40G-SR-BD

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Entry Through-Hole PCB Mounting RJ45 Connector

Entry Through-Hole PCB Mounting RJ45 Connector ARJ045-010156

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SMT Magnetic RJ45 Surface Mount Ethernet Connector

JB0-1002NL 10/100 Base-t Tab up SMT Magnetic RJ45 Surface Mount Ethernet RJ45 Connector With Led

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Lumopt Opto Technology Co., Ltd.

Registered as Luguang Communication Technology Co., Ltd. in China

We stand at the interface of modern optical-electric systems, pioneering the design, manufacture, and deployment of top-tier networking components. Our expertise spans standard copper transmission systems, high-speed ethernet jacks, magnetic-integrated RJ45 modules, and optical modules (10G, 25G, 100G, 400G, 800G, and 1.6T transceivers). By bridging the physical layer with advanced micro-electronic layouts, we deliver robust connectivity solutions that power high-density cloud networks, automated factories, and edge computing nodes.

Leveraging dust-free production facilities and advanced signal-integrity testing laboratories in China, Lumopt supplies global markets with tailored OEM and ODM services. Our engineered components align with RoHS, CE, FCC, and IEEE standards, enabling reliable data transmissions under rigorous thermal and electromagnetic parameters.

Lumopt Opto Technology Production Facility Overview
Dust-Free Production Floor and Clean Room Operations

A Trusted One-Stop Factory for Optical Transceivers & RJ45 Connector Modules

In high-frequency communication design, physical layout constraints dictate network stability. Our facility specializes in high-isolation, low-insertion-loss network connectors that incorporate integrated magnetics (MagJacks). These prevent crosstalk (NEXT/FEXT) and mitigate common-mode EMI noise.

Whether provisioning ruggedized, waterproof RJ45 keystones for outdoor deployments or deploying sub-nanosecond latency optical modules for AI backend networks, we collaborate closely with system integrators to balance costs with performance.

Physical Interconnect Physics & Technology Roadmap

An in-depth look at performance parameters across ethernet categories and optoelectronic transceivers.

Modern network topologies demand robust noise isolation. Wired connectors must preserve signal integrity against electromagnetic interference (EMI), electrostatic discharge (ESD), and high insertion-force stress. Here is how modern ethernet standardizations align with physical hardware specifications:

Connector Type / Category Bandwidth Limit Maximum Transmission Rate Shielding (STP/UTP) Required Target Applications
Category 5e (Cat5e) 100 MHz 1 Gbps Optional (Usually UTP) Legacy Enterprise & Residential Networks
Category 6 (Cat6) 250 MHz 1 Gbps (10 Gbps @ <55m) Optional (UTP/FTP) Modern Commercial LANs & SOHO Installations
Category 6A (Cat6A) 500 MHz 10 Gbps Recommended (STP) Enterprise Servers, Storage Networks (SAN), VoIP Systems
Category 8 (Cat8) 2000 MHz 40 Gbps Mandatory (SFTP) Datacenter Switch-to-Server Switch Fabrics
Optical Modules (SFP28 to QSFP-DD) High Frequency / Dual Wavelength 25G / 100G / 400G / 800G Optical Duplex Fiber LC/MPO AI Compute Clusters, Hyperscale Edge, Core Telecom

Magnetic Integration (MagJacks)

Integrating isolation transformers directly into RJ45 housings limits physical PCB footprint. This configuration shields PHY chips from common-mode noise, prevents DC offsets, and blocks transient voltage surges (ESD) up to 1,500V.

EMI/RFI Shielding Integrity

Nickel-plated copper alloy shields with ground tabs (EMI fingers) bypass high-frequency interference to ground. This is vital in dense industrial cabinets where motors, drives, and power lines generate field noise.

Gold Plating & Life Cycles

Engineered contact pins feature 30u" to 50u" gold plating over nickel barriers. This provides low contact resistance (<20 mΩ) and endures over 750 mating cycles without physical degradation.

100%
Integrated Testing
10G-1.6T
Optical Module Range
750+
Mating Life Cycles
RoHS
Material Compliance

Chronological Manufacturing & Testing Quality Assurance Flow

A transparent look inside our Chinese production facility, displaying step-by-step processes that guarantee stable mechanical and electrical parameters.

Twisting Wire Core Process
1. Twisting
PCB Tinned Pin Preparation
2. PCB Tinned
Soldering Component Joint Assembly
3. Soldering
Shear-LED-Pin Precision Cutting
4. Shear-LED-Pin
Semi-finished Testing Calibration
5. Semi-finished Testing
Plastic-Case-Assembly Housing Process
6. Plastic-Case-Assembly
Hi-pot Testing Safety High-Voltage Inspection
7. Hi-pot Testing
Integrated-Testing Performance Evaluation
8. Integrated-Testing
Final-Inspecting Output Control
9. Final-Inspecting
Packing Automated Safe Sealing
10. Packing

Advanced Quality Assurance Instruments & Systems

A showcase of the testing apparatus and automated machinery deployed in our factory floor to achieve zero-defect physical and electrical tolerances.

Comprehensive Tester Instrument
Comprehensive Tester
LED Lamp Tester Calibration
LED Lamp Tester
Hi-Pot Tester Isolation Validation
Hi-Pot Tester
Automatic Welding Machine Manufacturing
Automatic Welding Machine
Laser Marking Machine Labeling
Laser Marking Machine
Transformer Automatic Tester
Transformer Automatic Tester
Transformer Automatic Packing Machine
Transformer Packing
RJ45 Automatic Tester Analyzer
RJ45 Automatic Tester
Automated Testing Close Up
Precision Calibration Workbench

Targeted Architectural Application & Integration Scenarios

Analyzing how different network connectors are optimized to meet the physical and electrical conditions of diverse real-world environments.

1. Hyperscale Cloud Datacenters

Hardware Demand: Ultra-low insertion loss, sub-microsecond optical links, and high port-density profiles.
Wired Integration: High-density low-profile RJ45 jacks are utilized for out-of-band management and console switch architectures. Concurrently, 100G/400G optical transceivers operate along the leaf-spine fabric to manage inter-switch links and high-bandwidth east-west traffic.

2. High-EMI Industrial Automation

Hardware Demand: Complete magnetic shielding (STP/FTP) and structural resistance to chemical cleaners and vibrations.
Wired Integration: Automated manufacturing systems require specialized shielded waterproof RJ45 connector assemblies. Magnetic jacks with built-in common-mode filtering isolate delicate controller modules from variable frequency drives (VFDs) and electrical noise.

3. Smart Grids & Outdoor Telecom Nodes

Hardware Demand: Protection against surge currents, waterproof seals, and extended operating temperature ranges (-40°C to +85°C).
Wired Integration: Outdoor small-cell structures and municipal sensors utilize sealed, waterproof RJ45 connectors. The contact points are plated with heavy gold layers to resist corrosion, and combined with high-grade, UV-resistant housing materials.

Supply Chain Resilience & Manufacturing Efficiency Advantage

Procuring connectors and transceivers from China offers cost benefits, design customization, and reliable scalability. Lumopt operates vertical manufacturing structures that integrate lead-frame punching, plastic injection molding, and component winding.

  • Automated Assembly: Specialized automatic welding and laser-marking systems reduce labor variances, maintaining stable physical quality.
  • OEM/ODM Flexibility: We adjust shell layouts, PCB routing patterns, LED configurations, and pin arrangements to align with custom system boards.
  • Sourcing Stability: Direct links with copper sheet refineries and precision plastics suppliers insulate production schedules from global supply disruptions.

Compliance & Reliability Standards

We maintain structured quality tracking records. Each finished product undergoes multi-stage inspections, including return-loss checks and high-pot isolation trials.

Our products meet global standards for mechanical, electrical, and thermal endurance.

IEEE 802.3 RoHS Compliant IEC 60603-7 UL 94V-0

Technical Consultation & Engineering FAQ

Addressing core mechanical, electrical, and commercial layout questions from system designers and sourcing managers.

Q1: What are the differences between an RJ45 connector with integrated magnetics (MagJack) and a standard RJ45 connector?
A standard RJ45 is a passive metal connector that requires isolation transformers on the main PCB system. A MagJack integrates these transformers directly inside the connector housing. This saves PCB board space, simplifies routing, improves EMI shielding by positioning the magnetic core closer to the port, and protects PHY chips from electrical surges.
Q2: How do your ethernet connectors handle PoE, PoE+, and PoE++ requirements?
Our high-spec connectors use low-resistance copper-alloy contacts and thermal-resistant plastic housings rated to UL 94V-0. They support current loads up to 1A per pin, enabling compatibility with IEEE 802.3at (PoE+ up to 30W) and IEEE 802.3bt (PoE++ up to 90W) without thermal degradation or signal loss.
Q3: Why is gold plating thickness on contacts critical for high-reliability applications?
Gold is resistant to oxidation and corrosion. Thicker gold layers (like 30u" or 50u") maintain low contact resistance over repeated mating cycles. This is vital in humid, high-vibration, or marine environments where thin plating can wear away, causing signal dropouts and transmission errors.
Q4: What customization options are available for OEM/ODM orders?
We support complete physical adjustments, including tab-up or tab-down configurations, low-profile designs, vertical or right-angle pins, surface-mount (SMT) or through-hole mounting, custom LED colors (yellow, green, orange, or bi-color), and variable EMI ground-tab layouts.
Q5: How does your factory verify signal integrity for high-speed components?
Every production batch undergoes testing with network analyzers and high-pot testers. We check insertion loss, return loss, near-end crosstalk (NEXT), far-end crosstalk (FEXT), and insulation resistance up to 1,500V AC. This ensures each batch complies with TIA-568-C.2 and IEEE standards.
Q6: How do optical transceivers integrate with wired network layouts in modern system boards?
Modern network designs often combine optical transceivers (for high-speed, long-distance backhaul) and wired RJ45 connectors (for local, low-cost device connections). Lumopt manufactures both product lines, allowing us to support system designs that require unified optical and copper architectures.

Complete Portfolio Directory

Explore our high-performance transceivers, low-profile sockets, and specialized waterproof network components.

LEDs 100 Base-T Dual USB RJ45 Magnetic Jack

RU1-161A9WGF RU7-160F7G1F RU1-161A1Z2F With LEDs 100 Base-T Dual USB RJ45 Magnetic Jack

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100GBASE-ER4 SMF QSFP28 Transceiver

100GBASE-ER4 SMF QSFP28 Transceiver Duplex LC Single Mode 1310nm 100G Optical Module 40km

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Customized Connecteur RJ45 Keystone Modular

Customized Connecteur Rj 45 Keystone Modular Pcb Jack Waterproof Ethernet Rj45 Pass Through Female Connectors

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Tab up Low Profile Magnetic RJ45 Socket

Tab up Low Profile Magnetic RJ 45 Socket Shielded 1 Port 10G Female RJ45 Jack

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Ethernet Vertical Jack RJ45 Female Socket

Ethernet Vertical Jack RJ45 Female Socket HFJV1-1G46RL HFJV1-2450-L55RL 1840459-1 1840453-1

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25G CWDM SFP28 Transceiver

Single Mode 25G CWDM SFP28 Transceiver 10km Duplex LC SMF Optical Transceiver Module

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Female RJ45 Modular Plug

Female RJ45 for Internet Modular Plug TIC-L003-11

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RJ45 Connector MagJack 100BASE-TX

0879-2C2R-DA RJ45 Connector MagJack 100BASE-TX 2X2 ETHERNET BOTH RoHS With EMI finger

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