Panduit FSUYBXRNNNNM015 OM4+ 24F LC Cassette LSZH 15m

Panduit FSUYBXRNNNNM015 OM4+ 24-Fiber Front-Access LC Cassette Assembly, LSZH B2ca, 15m

The Panduit FSUYBXRNNNNM015 is a FlexCore™ front-access ODF cassette assembly engineered for high-density datacenter and enterprise fiber deployments where space, signal integrity, and fire safety are non-negotiable. This 24-fiber OM4+ trunk delivers LC duplex connectivity on the cassette side with a 15-meter unterminated tail for field splicing or custom termination at the far end. Rated Euroclass B2ca with LSZH jacketing, it meets European building codes for low smoke and zero halogen emissions in enclosed pathways and plenum-equivalent spaces. The front-access cassette design allows live port maintenance without disrupting rear-mounted trunk routing—critical in populated racks where every U counts and downtime windows are measured in minutes.

Key Features

• OM4+ multimode fiber (50µm core) supports 40GBASE-SR4 to 150m, 100GBASE-SR4 to 100m, 400GBASE-SR8 to 70m per IEEE 802.3
• 24-fiber high-density cassette assembly consolidates two 12-fiber MPO trunks worth of connectivity in one module
• LC duplex connectors factory-terminated with ultra-low insertion loss (<0.35 dB typical) for minimal signal budget impact
• Front-access FlexCore ODF cassette permits port adds/moves/changes without accessing rear trunk splice enclosure
• Euroclass B2ca LSZH (Low Smoke Zero Halogen) jacket complies with EN 50575 for European indoor installations and plenum-equivalent spaces
• 15-meter tethered trunk cable with unterminated end allows field fusion splicing to building backbone or equipment pigtails
• Polycarbonate cassette housing rated for 11.7mm height × 292.8mm width fits standard 1U fiber enclosures with edge-to-edge mounting
• Black jacket and connectors for consistent appearance in front-facing patch panels and rack-mount enclosures
• RoHS 2002/95/EC compliant, meets ISO/IEC 11801, ANSI/TIA-568-C.3, TIA-604-5 (FOCIS-5), TIA-604-10 (FOCIS-10), IEEE 802.3, ANSI T11.2

OM4+ fiber extends the performance ceiling of traditional OM4 by tightening overfilled launch (OFL) bandwidth and effective modal bandwidth (EMB) tolerances, enabling longer reach for 40G/100G parallel optics and headroom for emerging 400G SR8 applications in campus backbones and leaf-spine datacenter fabrics. The 50µm core diameter balances modal dispersion control with launch coupling efficiency from VCSEL transceivers, while the factory-terminated LC duplex connectors undergo end-face geometry inspection to guarantee <0.35 dB insertion loss and >-50 dB return loss per TIA-604-5 standards. Ultra-low insertion loss matters in cascaded architectures—every 0.1 dB saved across six cassette interconnects preserves 0.6 dB of link budget for longer spans or additional splice points. The FlexCore cassette uses a staggered internal routing design that prevents fiber stress at the 90-degree turn from trunk cable to LC adapter block, maintaining the 30mm minimum bend radius required to avoid macrobend attenuation at 850nm and 1300nm wavelengths. Unlike slide-out cassette designs that risk fiber pinch during insertion, the front-access hinged door keeps the trunk cable stationary while exposing LC ports for patching—critical when the cassette is pre-loaded with 24 live links and a single kinked fiber could black out an entire top-of-rack switch uplink. The polycarbonate housing provides dimensional stability across -20°C to +70°C operating temperatures without the thermal expansion issues of stamped-metal cassettes that can misalign LC adapters and increase insertion loss by 0.2 dB or more in thermally-cycled environments.

Datacenter builds subject to European EN 50575 Construction Products Regulation require Euroclass B2ca or better for permanent links in vertical risers, horizontal cable trays, and above-grid pathways that lack independent fire suppression—traditional PVC-jacketed assemblies emit dense black smoke and hydrochloric acid vapor when exposed to flame, creating life-safety and equipment corrosion hazards that LSZH jacketing eliminates while maintaining the same 11.7mm outside diameter for existing conduit fills. The unterminated 15-meter trunk tail aligns with typical row-to-EOR (end-of-row) distances in modular datacenter pods, allowing the cassette to mount in a front-facing 1U fiber enclosure at the rack while the trunk routes overhead to a central splice cabinet where it fuses to OS2 single-mode backbone or OM4 building riser cables. Front-access architecture solves the "populated rack" problem: when 42U are filled with servers and the rear door barely opens, swapping a failed LC patch cord from the front takes 90 seconds instead of the 20-minute ordeal of dressing the rear door, unwrapping trunk strain relief, and re-securing cable management hardware. This assembly's 292.8mm width fits edge-to-edge in a standard 19-inch panel with 6mm clearance per side for mounting ears, while the 11.7mm height permits stacking four cassettes in a 2U enclosure for 96-fiber density—double the port count of traditional 1U 48-port panels at half the insertion loss of MPO-to-LC breakout modules that introduce two additional mated pairs and 0.5 dB typical penalty per channel.

Standards compliance spans ISO/IEC 11801 Ed. 2.2 Class OM4, ANSI/TIA-568-C.3 850nm laser-optimized multimode, TIA-604-5 (FOCIS-5) LC physical layer, TIA-604-10 (FOCIS-10) MPO interface geometry, and ANSI T11.2 Fibre Channel specifications, ensuring interoperability with Cisco/Juniper/Arista 40G/100G optics, Corning/CommScope backbone cable, and third-party LC patch cords without adapter mismatch penalties or polish-angle incompatibilities. The FlexCore cassette form factor integrates with Panduit's FOP family of wall-mount enclosures, rack-mount panels, and splice trays, allowing graceful capacity expansion—start with 24 fibers in one cassette serving initial tenant build-out, then populate three more in the same 2U enclosure as occupancy grows, all sharing a common breakout gland and trunk routing path without re-pulling cables or reconfiguring pathways. Use case example: A colocation provider deploying 100G leaf-spine in a retrofit building with legacy 2-inch PVC conduit runs FSUYBXRNNNNM015 cassettes at each leaf switch, fuses the unterminated tails to OM4 riser pairs in the MDF splice cabinet 90 meters away, and achieves <1.8 dB end-to-end insertion loss over 180-meter total spans—well within the 100GBASE-SR4 2.6 dB budget and leaving 0.8 dB margin for future re-splices, emergency break-fix jumpers, or migration to 400GBASE-SR8 optics that demand <2.4 dB channel budgets for 70-meter reach.