Panduit FHSN-24 HD Flex™ 24-Fiber Splice Cassette

The Panduit FHSN-24 is a high-density fiber cassette designed for data center and structured cabling installations requiring maximum port density in minimal rack space. This splice-ready module houses 24 fibers terminating to 12 duplex LC ports on the front panel, while the rear connector remains unterminated for field splicing to backbone or riser cable. Built on Panduit's HD Flex platform, the FHSN-24 delivers 288-fiber capacity per rack unit when deployed in compatible enclosures—triple the density of traditional fiber panels—making it the primary choice for hyperscale data centers, colocation facilities, and enterprise network core builds where horizontal space is constrained and per-port cost matters. The polycarbonate housing meets commercial-grade durability standards for repeated access during MACs (moves, adds, changes), while the splice-through architecture eliminates pre-terminated trunk cost and lead time, enabling installers to build custom fiber counts and lengths on-site without vendor dependency.

Key Features

• 24-fiber capacity terminating to 12 duplex LC ports for high-density patching in compact footprint
• Splice-ready design with unterminated rear connector—field-terminate to any fiber count or cable type on-site
• HD Flex platform compatibility for up to 288 fibers per 1U enclosure when fully populated
• Black polycarbonate housing engineered for repeated access cycles during MAC operations
• Factory-installed LC adapters with alignment sleeves—no field polishing or connector assembly required on patch side
• Integrated splice tray with fiber management routing—supports fusion or mechanical splice methods
• Color-coded for rapid visual identification in multi-cassette deployments
• Ships in cartons of 10 units for large-scale rollouts and inventory cost efficiency

Fiber cassette modules solve the core problem of traditional patch-panel architecture: wasted rack space. A legacy 1U LC panel maxes out at 48 fibers (24 duplex ports), consuming four rack units to reach 192-strand capacity. The FHSN-24 cassette inverts that equation—when deployed in Panduit's FHD series enclosures, twelve of these modules fit in a single rack unit, delivering 288 fibers in the same 1.75" vertical space a conventional panel uses for 48. That 6:1 density multiplier translates directly into capital cost savings: fewer racks purchased, less floor space leased, reduced cooling load per usable port. The splice-through topology adds operational flexibility absent from pre-terminated MTP trunk cassettes. Where MTP systems lock you into 12- or 24-fiber increments with fixed lengths ordered weeks in advance, splice cassettes let you land any fiber count—8-strand riser cable, 144-strand backbone, 216-count outside plant—using bulk cable you stock on-site. Installers fusion-splice the incoming cable to the cassette's pigtails inside the integrated splice tray, then snap the module into the enclosure. No vendor lead time, no over-purchasing fibers you won't use, no undersizing a run because the next MTP increment is too expensive. The result is a build-to-suit backbone infrastructure that adapts to your floor plan instead of forcing your floor plan to adapt to pre-fab trunk increments.

Deployment context determines whether splice cassettes or MTP trunks make economic sense. Greenfield data halls building 500+ fiber runs favor MTP for speed—a 24-fiber MTP trunk installs in under two minutes with zero splicing labor. But for phased deployments, building expansions, or retrofit projects where fiber counts are unpredictable and trunk lengths vary floor-to-floor, the FHSN-24's splice model eliminates waste. A typical scenario: colocation provider expanding from 10 to 40 racks across three phases over 18 months. Phase 1 needs 96 fibers, Phase 2 adds 144, Phase 3 another 192—each phase pulling cable from a different building entry point with different distances. Ordering three separate MTP trunk SKUs with three different lengths and three different fiber counts means three purchase orders, three lead times, and three chances to over- or under-provision. Stocking 864 meters of 12-strand single-mode bulk cable and a case of FHSN-24 cassettes handles all three phases with same-day turnaround: pull the length you need, splice to the count you need, rack the cassettes you need. The polycarbonate housing withstands the handling abuse of this workflow—installers removing cassettes mid-build to add another module, swapping cassette positions to match floor labeling, pulling cassettes out monthly for adds as tenants turn up new circuits. The material is impact-resistant to drops during rack installation and chemically stable in the temperature swings of under-construction data halls that haven't reached thermal stability. Fiber routing inside the cassette uses bend-radius-compliant guides that prevent kinking during splice tray access, and the LC adapter block is anchored with metal retention clips rather than plastic snap-fits that fatigue after 50 insertion cycles.

The FHSN-24 is UL and cUL listed for plenum installation when used with appropriate plenum-rated cable, and the 24-fiber/12-port configuration maps cleanly to TIA-568 structured cabling standards for backbone and horizontal distribution. Panduit publishes insertion loss and return loss specs for the factory-installed LC adapters, ensuring compliance with IEEE 802.3 10GBASE-SR, 40GBASE-SR4, and 100GBASE-SR10 link budgets when paired with OM3 or OM4 multimode fiber, and exceeds performance margins for single-mode 10G-LR, 40G-LR4, and 100G-LR4 applications common in storage-area-network and long-haul interconnects. For procurement planning: each cassette occupies one module slot in Panduit FHD enclosures, so a fully-loaded 1U FHD chassis holds twelve FHSN-24 units for 288-fiber capacity, while a 4U chassis scales to 1,152 fibers—sufficient backbone density to serve a 50-rack data hall with 24-strand homerun architecture from a single floor-mounted relay rack, eliminating the overhead-cable-tray congestion and multi-panel sprawl typical of distributed patching topologies.