F-tone FT21AC01201 SFP 2x1 Cage Connector With Inner LightPipe

F-tone FT21AC01201 2x1 SFP Stacked Receptacle and Cage Assembly

Engineered to maximize faceplate I/O density while streamlining printed circuit board (PCB) assembly, the F-tone FT21AC01201 is a highly integrated 2x1 (stacked) SFP cage and electrical receptacle. By vertically stacking two Small Form-factor Pluggable (SFP) ports within a narrow 14.00mm footprint, this connector empowers data center architects and hardware designers to effectively double the port capacity of standard 1U or 2U chassis designs. Unlike standalone cages, this comprehensive module integrates both the mechanical EMI shielding cage and the electrical receptacle into a single, pre-aligned unit, ensuring flawless transceiver mating and simplified manufacturing.

Constructed from a premium Copper Alloy with 30u" plating, this robust cage assembly delivers superior structural integrity and long-term resistance to oxidation. Featuring a rugged industrial operating temperature range of -40°C to +85°C, the FT21AC01201 guarantees mission-critical reliability for climate-controlled enterprise data centers as well as unconditioned outdoor edge computing environments.

Integrated Inner LightPipes for Visual Diagnostics

Providing clear, port-level diagnostic feedback in high-density stacked configurations is a significant mechanical challenge. The FT21AC01201 intelligently resolves this by incorporating precision-engineered Inner LightPipes.

• Targeted Visibility: This internal optical channel efficiently captures light from surface-mounted LEDs located on the PCB and routes it directly to the front chassis bezel.
• Streamlined Outer Profile: By utilizing only the inner lightpipe, the outer profile of the cage remains completely unobstructed. This design is highly advantageous for custom faceplate bezels that require tight external clearances while still delivering essential visual status indicators (such as Link and Activity) to network administrators.

Advanced EMI Containment & Shielding

Managing Electromagnetic Interference (EMI) in high-density, multi-port chassis configurations is a critical design mandate. The FT21AC01201 achieves superior electromagnetic compatibility (EMC) through its heavy-duty construction.

• Continuous Faraday Shielding: The premium copper alloy cage acts as a continuous shield, aggressively containing internal high-frequency emissions generated by the PHY transceivers and ensuring strict compliance with FCC, CE, and CISPR regulatory standards.
• Chassis Grounding: Designed to mate seamlessly with metallic chassis bezels, the cage creates a low-impedance electrical path to ground, effectively sealing the enclosure against external Radio Frequency Interference (RFI).
• Port-to-Port Isolation: Internal metallic dividers between the upper and lower receptacles act as physical and electrical barriers, dramatically reducing near-end crosstalk (NEXT) between the stacked SFP transceiver modules.

Mechanical Design & Press-Fit PCB Integration

Hardware engineers prioritize long-term mechanical reliability and high-yield manufacturing. The FT21AC01201 leverages advanced solderless technology to optimize the assembly workflow.

• Press-Fit (Compliant Pin) Technology: The assembly utilizes a Through-Hole Press-Fit mounting style. The compliant pins are driven directly into plated through-holes (PTH) on the PCB, creating a cold-welded, gas-tight mechanical bond that heavily resists vibration, physical shock, and completely eliminates the thermal stress of secondary wave soldering.
• Optimized PCB Compatibility: Specifically designed for heavier, multi-layer telecom-grade boards, requiring a recommended PCB thickness of 2.36mm (0.093 inches) to ensure proper press-fit engagement and long-term mechanical stability.

Typical Applications

Combining massive stacked port density, industrial-grade thermal resilience, and targeted inner lightpipe diagnostics, the FT21AC01201 is the optimal interconnect solution for high-throughput network architectures:

• Data Center & Enterprise Switching: High-density Top-of-Rack (ToR) switches, core routers, and network aggregation devices demanding space-saving stacked port matrices.
• Telecommunications Infrastructure: Broadband access hubs, 5G baseband units (BBUs), and fiber-to-the-x (FTTX) optical line terminals (OLTs).
• Industrial & Edge Computing: Ruggedized industrial Ethernet switches and micro-data center nodes deployed in extreme temperature environments (-40°C to +85°C).
• Network Security: Next-generation firewalls, intrusion detection systems (IDS), and unified threat management (UTM) hardware with specialized front-bezel clearances.