1658939-3 SFP 1X6 CAGE LIGHT PIPE KIT 16 Gbs EMI Springs

TE 1658939-3 1x6 SFP Ganged Cage Assembly with Lightpipes

Engineered to maximize faceplate I/O density and streamline visual diagnostics in next-generation networking equipment, the TE 1658939-3 is a high-performance 1x6 (6-port) ganged SFP cage assembly. Designed as a unified cable-to-board interconnect solution, it houses Small Form-factor Pluggable (SFP) optical transceivers and direct-attach copper (DAC) cables, reliably supporting high-bandwidth data transmission rates up to 16 Gb/s per channel. By consolidating six physical ports into a single, highly aligned mechanical structure, hardware architects can drastically optimize printed circuit board (PCB) real estate for 16G Fibre Channel (16GFC) and high-density Gigabit edge architectures.

Built to endure severe environmental extremes, this cage assembly delivers robust mechanical durability across an extended, military-grade temperature range of -55°C to 85°C. Utilizing a highly reliable solderless Through Hole Press-Fit mounting mechanism, the 1658939-3 ensures a permanent, gas-tight mechanical connection to the PCB without subjecting the motherboard to the thermal stress of secondary wave soldering processes.

Integrated Lightpipes for Visual Diagnostics

In high-density switching environments, providing clear, port-level diagnostic feedback is a critical design mandate. The 1658939-3 resolves this by incorporating precision-engineered integrated lightpipes into the cage structure. These optical channels efficiently capture and route light from surface-mounted LEDs located on the PCB directly to the front chassis bezel. This provides network administrators with immediate, unambiguous visual status indicators (such as Link and Activity) for all six individual ports, without compromising the cage’s electromagnetic shielding or structural rigidity.

Advanced EMI Containment & Shielding

Managing Electromagnetic Interference (EMI) at 16 Gbps frequencies requires aggressive containment strategies, especially as port densities scale on the faceplate.

• Multi-Point EMI Springs: Heavy-duty metallic EMI springs surround the front perimeter of the cage opening. These springs ensure continuous, low-impedance electrical contact with the metallic chassis bezel, aggressively sealing the enclosure against external Radio Frequency Interference (RFI).
• High-Frequency Containment: The metallic alloy structure acts as a continuous Faraday shield, containing internal high-frequency emissions generated by the PHY transceivers to ensure strict compliance with FCC, CE, and CISPR regulatory standards.
• Port-to-Port Isolation: The internal divider walls of the 1x6 ganged cage act as physical and electrical barriers, virtually eliminating near-end crosstalk (NEXT) and electromagnetic coupling between adjacent SFP modules.

Mechanical Design & Press-Fit PCB Integration

Hardware engineers prioritize long-term mechanical reliability alongside high-yield manufacturing. The 1658939-3 leverages advanced compliant pin technology to optimize the PCB assembly workflow.

• Press-Fit (Compliant Pin) Technology: Completely eliminates the need for wave soldering. The compliant pins press directly into plated through-holes (PTH) on the PCB, creating a cold-welded, gas-tight electrical and mechanical connection that heavily resists physical vibration and thermal cycling.
• Structural Rigidity: Acts as a rigid mechanical guide rail system, absorbing the physical stress of frequent SFP transceiver insertion and extraction, thereby protecting the delicate SFP surface-mount electrical connectors located beneath the cage assembly.
• Thermal Endurance: The extreme -55°C to 85°C operating range ensures uninterrupted physical protection for optics deployed in unconditioned outdoor telecom cabinets, industrial factory floors, and aerospace applications.

Typical Applications

Offering massive 6-port density, 16 Gb/s bandwidth support, rapid solderless assembly, and built-in diagnostic lightpipes, the 1658939-3 SFP cage is the optimal choice for high-throughput network infrastructure:

• Storage Area Networks (SAN): 16G Fibre Channel (16GFC) enterprise storage arrays, host bus adapters (HBAs), and SAN switching fabrics requiring uncompromised signal integrity.
• Telecommunications Infrastructure: Broadband aggregation routers, Central Office (CO) switches, and high-capacity 5G optical transport nodes.
• Enterprise & Data Center Networking: High-density Gigabit edge routing platforms, Top-of-Rack (ToR) switches, and core network aggregation devices.
• Industrial & Edge Computing: Hardened Industrial Ethernet switches deployed in extreme manufacturing, outside plant (OSP), and harsh energy sector environments.