Lumetra
Lumetra
Industrial-grade stacked integrated connectors engineering high-speed network connectivity and space-saving PCB designs globally.
Explore our top-tier catalog of space-efficient stacked and single-port modular jacks engineered for maximum throughput and EMI suppression.
In modern industrial hardware engineering, PCB (Printed Circuit Board) real estate is at a premium. The convergence of Ethernet communication and high-speed data peripheral access has pushed the development of the RJ45 female connector with USB ports. By combining these two distinct interface types into a single component, hardware designers achieve multiple mechanical and structural advantages.
Typically referred to as a "combo jack" or "stacked connector," this component houses integrated magnetics for filtering high-frequency noise alongside standard USB female differential data rails. For global procurement officers and electronic system architects, specifying the right RJ45 USB stack means examining crosstalk parameters, structural stability under high mating-cycle fatigue, and electromagnetic interference (EMI) containment characteristics.
Integrating RJ45 and USB interfaces into one single metal-shielded container saves up to 45% of the PCB surface footprint compared to separate configurations, while reducing overall trace-routing length and parasitics on critical high-speed differential pairs.
Behind the outer metal shell lies a complex arrangement of passive components. The RJ45 portion is not merely a collection of copper pins; it includes integrated magnetics (known as MagJacks) consisting of:
Concurrently, the adjacent USB port is physically isolated using dedicated thick steel internal partitions to prevent the differential data lines of USB 2.0 (480 Mbps) or USB 3.0 (5 Gbps+) from coupling with the Ethernet magnetics. Without this robust architecture, cross-talk would significantly degrade both Ethernet packets and USB signal integrity.
For engineering design-ins, consult the operational parameters for our RJ45 with USB stacked modules to ensure thermal and signal boundaries match application standards.
| Parameter / Specification | RJ45 Ethernet Segment | USB Interface Segment (USB 3.0 / USB 2.0) | Overall Component Environmentals |
|---|---|---|---|
| Operating Voltage / Current | 125 VAC RMS / 1.5 Amps max | 5 VDC (standard) / up to 1.8 Amps for charging | Dielectric Strength: 1500V AC RMS min |
| Contact Resistance | < 30 mΩ (milliohms) max | < 30 mΩ max | Tested post-mechanical stress cycles |
| Insulation Resistance | > 500 MΩ min at 500V DC | > 1000 MΩ min at 500V DC | Maintains isolation in high-humidity ambient environments |
| Mating / Unmating Force | 22.5 N (Newton) max latch strength | 35 N max insertion; 10 N min withdrawal | Engineered to prevent accidental disconnection |
| Gold Plating Selection | Gold Flash / 15u" / 30u" / 50u" Min over Nickel | 30u" / 50u" Gold plating on contacts | Protects against contact oxidation in corrosive environments |
| Operating Temp Range | -40°C to +85°C (Industrial Grade Option) | -40°C to +85°C (Industrial Grade Option) | Suitable for embedded computing & outdoor IoT nodes |
In high-frequency transmission, signal losses are inevitable. Our manufacturing process focuses heavily on reducing Insertion Loss ($S_{dd21}$) and improving Return Loss ($S_{dd11}$) metrics. The internal design keeps RJ45 insertion losses below -1.0 dB up to 100 MHz (suitable for Cat5e and Cat6 performance). For USB 3.0 lines, we run strict time-domain reflectometry (TDR) measurements to maintain differential impedance at $90 \Omega \pm 10\%$. Deviations beyond this limit create signal reflections, resulting in packet drops and a fall-back to USB 2.0 fallback rates.
Statistical snapshot of how modern communication, optical integration, and hardware technologies are driving stacked connector sourcing requirements globally.
Founded in 2016, Lumetra Optoelectronics Technologies Co., Ltd. is a recognized leader in high-speed datacom, telecom, and cloud infrastructure applications. With an 11-year depth of overall industry expertise and 7 years of global export experience, Lumetra has built a robust reputation as a reliable connector and transceiver partner for telecom operators, data center integrators, and OEM system manufacturers.
Operating out of an 8,500㎡ facility, the company maintains advanced manufacturing and assembly lines that combine automated performance verification, environmental stress screening, and rigorous quality inspection. Our engineering capability extends from active optical transceivers to passive copper interconnects such as high-density RJ45 female connectors with USB integration.
Lumetra's commitment to innovation is backed by 86 R&D engineers specializing in signal integrity, RF layout optimization, thermal dissipation modeling, and mechanical design. With 220 new product introductions in the past year alone, our roadmap continues to support advanced customization, protocol compatibility, and compliance with the most stringent industrial standards.
Our quality control team comprises 48 trained inspectors. Each product batch undergoes strict testing including mechanical mating endurance, solderability, contact retention force, and high-frequency vector network analyzer checking. This guarantees zero defect rates for missions where failure is not an option.
We support extensive customization parameters: multi-port configurations, variable LED indicator colors, custom shield ground pin lengths, integrated PoE capabilities (up to 90W standard), and specialty housing materials to withstand extreme operations.
From enterprise server farms to harsh factory floors, integrated RJ45 & USB connectors act as the reliable bridge for local data control and backhaul networking.
In modern data center nodes, space is calculated by vertical rack units (U). By deploying stacked RJ45 + USB units, network interface cards (NICs) and baseboard management controller (BMC) card surfaces are freed, enabling better airflow, improved thermal pathways, and higher density CPU clustering configurations.
PLCs (Programmable Logic Controllers) and industrial gateway nodes require ruggedized Ethernet for Modbus/IP communication alongside USB ports for local sensor log recovery. Our connectors feature robust shield tabs that ground stray ESD, protecting core circuitry from heavy machinery voltage surges.
Telecommunications equipment brands require stable interfaces with long service life. Lumetra's connector series features heavy phosphor-bronze contact pins with gold plating options up to 50 micro-inches, preventing connection degradation under hot plug-unplug operations.
The progression of edge-computing demands faster throughput from local connections. The historical RJ45 copper interface is adapting to meet high-speed networks, evolving from standard 10/100/1000Base-T toward Multi-Gigabit speeds (2.5G, 5G, and 10G Ethernet). The USB interface has similarly transitioned from USB 2.0 to USB 3.0/3.2, and currently towards Type-C configurations.
As a leading RJ45 connector manufacturer, Lumetra is actively prototyping the next generation of hybrid connectors. This includes:
This technical roadmap ensures that as our clients' systems advance, our interconnect components remain optimized for reliability, transmission quality, and mechanical durability.
Exporting to markets in North America, Europe, Southeast Asia, and the Middle East requires strict compliance with international manufacturing and environmental protocols. Lumetra ensures our entire manufacturing supply chain adheres to environmental regulations:
In partnering with over 1,200 verified supply chain suppliers, Lumetra mitigates risk related to raw material shortages. From phosphor bronze raw stock to high-frequency magnetic cores, we maintain safety inventory levels of raw elements to guarantee stable delivery schedules for large-volume OEM projects, even during times of macroeconomic stress.
For board designers and system architects. If your query is not resolved below, please reach out to our R&D support team.
Discover more variations including single-port, shielded, and active magnetic modules engineered for diverse board layouts.
Take a look inside Lumetra's state-of-the-art production environments, showcasing automated optical testing systems and cleanroom assembly operations.
