Hubs
Optimized Ethernet Connectivity for Legacy and Embedded Hubs
Ethernet hubs, though largely phased out in favor of switches, remain relevant in embedded systems, industrial automation, and low-cost local networks. These devices require robust magnetic connectivity for stable data transmission, electromagnetic interference (EMI) immunity, and optional Power over Ethernet (PoE) support. LINK‑PP offers high-quality RJ45 connectors and LAN magnetics designed specifically for such requirements.
Hub Connectivity Challenges
- Signal Collision Tolerance — Shared-medium devices must minimize packet corruption caused by signal reflections or crosstalk.
- EMI & ESD Resistance — Especially in industrial or unshielded environments, protecting against external interference is critical.
- Compact Layout — Many embedded hubs require small-form RJ45 or low-profile LAN transformers for dense PCB design.
- Passive Power Delivery — Some hubs distribute power passively via PoE passthrough, demanding compliant magnetics.
LINK‑PP's Magnetic Interface Solutions for Hubs
Surface-Mount RJ45 Connectors with Integrated Magnetics
Our magnetic RJ45 connectors are suitable for legacy 10Base-T and 100Base-T applications, as well as modern 1GBase-T embedded hubs. These connectors support:
- Built-in isolation transformers and common-mode chokes
- Optional EMI shielding with shielded metal housing
- Operating temperature range from –40 °C to +85 °C
- Compatibility with T568A/B wiring standards
Discrete LAN Magnetics for Passive Hub Designs
For hubs with custom PCB connector layouts, discrete LAN transformers offer flexibility in component placement and electrical tuning. Our solutions provide:
- Low insertion loss and high return loss (e.g., ≥ 16 dB @ 100 MHz)
- High common-mode rejection to mitigate noise
- 1000Vrms isolation voltage standard
- PoE transformer options for passive or semi-active power passthrough
Applications in Modern Hub Deployments
Even though switching technology dominates modern networks, Ethernet hubs are still used in scenarios such as: Industrial automation controllers Low-latency data broadcast systems Legacy embedded platforms with shared Ethernet buses Educational or lab setups requiring packet collision demonstration In these deployments, LINK‑PP provides compact and durable connectivity modules that balance cost-efficiency and signal reliability.
Why Choose LINK‑PP for Hub Connectivity?
| Feature | LINK‑PP Capability |
|---|---|
| Network Speeds | 10/100/1000 Mbps supported |
| EMI Compliance | Shielded RJ45 + high CMRR LAN transformers |
| Temperature Rating | Industrial grade (–40°C to +85°C) |
| Power Integration | PoE passthrough and transformer support |
| Signal Integrity | Optimized insertion and return loss for stable legacy Ethernet |
| Certifications | RoHS, REACH, ISO 9001, UL94V-0 |
FAQ: Designing Ethernet Hubs with Magnetic Interfaces
Q1: Are hubs still used in modern networked devices?
A: Yes. While less common in enterprise networks, hubs are still embedded in industrial systems, automation setups, and certain educational or legacy platforms.
Q2: What's the difference between hub magnetics and switch magnetics?
A: Hub magnetics emphasize shared-bus impedance tuning and higher isolation, whereas switch magnetics are optimized for point-to-point communication.
Q3: Can LINK‑PP magnetic RJ45s be used in passive hubs?
A: Yes. Our components are designed for compatibility with passive Ethernet designs and can support PoE passthrough when required.
Compliance & Reliability
LINK‑PP magnetic connectivity components are built to meet international compliance standards, including:
- RoHS / REACH for environmental safety
- ISO 9001 certified manufacturing
- IEEE 802.3 electrical conformance
- UL94V-0 flame retardancy (housing material)
All products are tested under industrial temperature conditions and high‑volume EMI/ESD stress testing to ensure reliability in long-term deployments.