Panduit F9UYBZLNNSNM015 FlexCore™ OS2 24-Fiber LC/APC Front-Access Cassette Assembly

The Panduit F9UYBZLNNSNM015 is a factory-terminated 24-fiber OS2 singlemode cassette assembly engineered for high-density datacenter and telecom deployments where rack space is constrained and splice-free installation is mandatory. This FlexCore™ front-access ODF cassette ships with 12 LC/APC duplex connectors factory-polished on the front panel and a 15-meter unterminated tail for field splicing to backbone infrastructure, enabling rapid deployment of low-loss singlemode links without on-site connector termination. The assembly meets Euroclass B2ca flammability requirements and ships with LSZH jacketing for installations subject to European fire-safety codes or plenum-alternative pathways in hospitals, airports, and occupied spaces where toxic smoke generation during fire is unacceptable.

Key Features

• 24 OS2 singlemode fibers in compact 1U-height cassette housing (11.7 mm × 292.8 mm footprint) for maximum port density per rack unit
• 12 factory-terminated LC/APC duplex connectors with angled physical contact ferrules deliver ≤ -60 dB return loss, eliminating back-reflection that degrades coherent optics and long-haul DWDM transmission
• Front-access FlexCore™ design allows connector access and cable management from the front of the ODF frame without disturbing adjacent cassettes or requiring rear-side clearance
• 15-meter unterminated tail enables field splicing to backbone or riser cables, reducing pre-deployment measurement uncertainty and accommodating varied cabinet-to-backbone distances
• Euroclass B2ca / LSZH construction meets EN 13501-6 fire-performance requirements for limited smoke and zero halogen emission during combustion, required for EU installations and recommended for critical-occupancy facilities
• Left-stub orientation (connectors exit left side of cassette) for structured polarity management in MTP-to-LC breakout architectures
• Standard insertion loss grade (typically ≤ 0.35 dB per mated pair) suitable for 10GBASE-LR, 40GBASE-LR4, 100GBASE-LR4, and Fibre Channel 16GFC/32GFC applications within the 10 km OS2 reach window
• Polycarbonate cassette housing with integrated strain relief and bend-radius protection prevents fiber damage during installation and service
• Complies with ISO/IEC 11801, ANSI/TIA-568-C.3, TIA-604-5 (FOCIS-5), TIA-604-10 (FOCIS-10), IEEE 802.3, and ANSI T11.2 Fibre Channel standards
• RoHS 2002/95/EC compliant for EU environmental directives

OS2 singlemode fiber supports 9 µm core diameter and operates across the 1310 nm and 1550 nm wavelength windows, providing the chromatic-dispersion characteristics required for 10 km, 40 km, and 80 km link budgets without inline amplification. The LC/APC connector's 8-degree ferrule angle reflects any residual light out of the fiber core rather than back toward the transmitter, a critical requirement for coherent modulation formats (100G and above) and analog video transport where reflected power creates interference. Unlike flat-polished LC/UPC connectors that exhibit -40 to -50 dB return loss, LC/APC connectors consistently achieve ≤ -60 dB, reducing bit-error rates on sensitive transponders and extending the useful lifespan of high-power lasers in DWDM systems. The factory termination eliminates field-polishing variables—connector end-face geometry is verified to IEC 61300-3-35 standards under interferometric inspection before the cassette leaves the factory, ensuring every port meets insertion-loss and return-loss specifications without requiring on-site testing equipment or re-termination labor. The 24-fiber count in a single cassette replaces twelve individual duplex patch cables, reducing congestion in the front cable-management trough and simplifying moves/adds/changes when re-patching active links.

FlexCore™ front-access cassettes install into Panduit FAP (Front Access Panels) or compatible 19-inch rack-mount ODF enclosures, allowing technicians to access connectors, route jumpers, and perform port tracing from the cabinet's front face without removing rear doors or displacing adjacent equipment—essential in colocation facilities where cabinet rear access requires coordination with neighboring tenants or in seismic-braced racks where rear doors are structural elements. The left-stub design positions the 15-meter tail to exit from the cassette's left side, aligning with TIA-568 polarity Method B when deployed in MTP trunk breakout architectures: backbone MTP-24 trunk cables land on the rear of the ODF frame, fanout to individual cassettes, and the left-stub orientation ensures transmit fibers on position A correspond to receive fibers on position B without crossover adapters. Installers splice the unterminated tail to incoming backbone or riser cables using fusion splicers in the ODF's rear splice tray, then coil excess fiber within the frame's splice management area; the 15-meter length accommodates typical cabinet-to-backbone distances in raised-floor datacenters (5–10 meters horizontal + 2–3 meters vertical drop) with sufficient slack for re-splicing during future reconfigurations. The cassette's compact 11.7 mm height allows up to 72 cassettes (1,728 LC ports) in a standard 42U rack when deployed with high-density FAP chassis, supporting the port counts required for spine-leaf datacenter fabrics and 100G/400G breakout applications.

B2ca flammability classification under EN 13501-1 indicates the cable contributes minimally to fire propagation and produces limited smoke opacity and no corrosive halogen gases during combustion, meeting the European Construction Products Regulation (CPR) mandate for fixed building installations. LSZH jacketing is specified for installations in occupied spaces (hospitals, schools, transportation hubs) where PVC combustion products would pose respiratory hazards during evacuation, and increasingly for datacenter hot-aisle containment systems where cable pathways run above IT equipment and smoke migration into airflow would damage sensitive electronics. Unlike standard PVC-jacketed assemblies that generate hydrochloric acid vapor when burned, LSZH compounds use mineral fillers that release only water vapor and carbon dioxide, reducing equipment corrosion and allowing faster facility recovery after fire events. The assembly's compliance with ISO/IEC 11801 Edition 2.2 and TIA-568-C.3 ensures compatibility with structured cabling design rules for commercial buildings, while TIA-604-5 and TIA-604-10 (FOCIS) conformance certifies connector end-face geometry for multimode and singlemode applications. This Panduit cassette is the field-proven solution for European datacenter builds under CPR mandates, enterprise campus backbone upgrades requiring splice-free deployment, and telecom central-office installations where technician access to rear cable trays is restricted by live power distribution or limited aisle clearance.