Panduit FWUYL7575LNM041 QuickNet OM5 24-Fiber Trunk Cable Assembly
The Panduit FWUYL7575LNM041 is a 41-meter OM5 wideband multimode trunk cable assembly engineered for high-speed datacenter backbones supporting 100GBASE-SR4, 400GBASE-SR8, and future short-wavelength division multiplexing (SWDM) applications. Featuring PanMPO female connectors on both ends, this 24-fiber trunk supports Method B polarity for seamless integration with structured cassette-based systems and provides Ultra Insertion Loss performance to maximize link budget. The lime-jacketed LSZH (Low Smoke Zero Halogen) cable uses Panduit's HD Flex design, reducing pathway congestion by 30-40% compared to legacy round trunk assemblies while maintaining bend-radius compliance in dense top-of-rack and spine-switch deployments.
Key Features
- OM5 wideband multimode fiber (50 µm core) supports 100G SWDM over duplex LC, 100GBASE-SR4 over 8 fibers, and 400GBASE-SR8 over 16 fibers with extended reach over OM3/OM4
- 24-fiber count in a single trunk assembly reduces connector touchpoints and simplifies structured cabling architecture for spine-leaf or modular cassette breakout systems
- PanMPO female-to-female connectors with Method B (key-up to key-down) polarity enable straight-through array mapping for 12-fiber or 24-fiber cassette modules
- Ultra Insertion Loss grade delivers ≤0.35 dB typical loss per mated pair to preserve link margin on 100m+ extended-reach deployments
- HD Flex transition cable design uses reduced-diameter construction (30-40% space savings) for high-density vertical cable managers, overhead ladder rack, and horizontal runway routing
- LSZH jacket meets IEC 60332-3-24 and produces minimal smoke and corrosive gas under fire conditions, required for enclosed equipment rooms and under-floor plenums in EMEA and APAC datacenters
- 41-meter (134.5 ft) length covers typical intra-row ToR-to-spine distances or inter-aisle core switch interconnects in structured datacenter layouts
- Lime cable jacket provides instant visual identification of OM5 trunks in mixed OM3 (aqua) and OM4 (magenta/violet) installations per TIA-598 color coding
- Factory-terminated and tested assemblies eliminate field splicing, reduce installation time by 60-80% versus fusion-spliced backbone cabling, and guarantee insertion loss and return loss performance out of the box
- Compliant with ISO/IEC 11801, TIA-568-C.3, TIA-604-5 (FOCIS-5), and RoHS; supports 40/100/400G Ethernet per IEEE 802.3ba/bm/bs standards
OM5 wideband multimode fiber represents the latest evolution in enterprise multimode standards, extending the wavelength range from OM3/OM4's 850 nm single-wavelength operation to a 840-953 nm window supporting SWDM transmission. This enables 100GBASE-SR4 applications to run over a single duplex LC connection (using four wavelengths per fiber) instead of eight fibers, cutting transceiver costs and connector density in half. For 400G deployments, OM5 supports 400GBASE-SR4.2 over eight fibers with SWDM, compared to 16 fibers required for parallel 850 nm optics over OM4. The FWUYL7575LNM041's 24-fiber array can support twelve 100G SWDM duplex links or three 400G SWDM 8-fiber links in a single trunk assembly. Even in legacy parallel-optic deployments (100GBASE-SR4, 400GBASE-SR8) without SWDM transceivers, OM5's 953 nm bandwidth specification delivers lower modal dispersion and extends effective reach by 20-30% over OM4, providing headroom for longer cross-connect distances or additional passive interconnects in the channel. The 50 µm graded-index core maintains full backward compatibility with installed OM3 and OM4 transceiver bases, allowing seamless migration as switch ports are upgraded to SWDM-capable optics without requiring a forklift replacement of horizontal or backbone cabling infrastructure.
Panduit's HD Flex cable construction addresses the primary constraint in modern hyperscale and colocation datacenters: vertical and horizontal pathway fill. Traditional round 24-fiber trunk assemblies using 3.0 mm round buffered fibers create a 12-15 mm outer diameter, consuming significant cable-tray and manager capacity and restricting airflow in enclosed vertical channels. The FWUYL7575LNM041 uses a flat ribbon-style layup inside a reduced-profile LSZH jacket, achieving a cross-sectional area 30-40% smaller than equivalent round trunks. In a 4-inch-wide vertical cable manager serving a 42U rack with twelve ToR switches, this reduction translates to fitting 18-20 HD Flex trunks in the same space that accommodates twelve round assemblies, directly enabling higher port density in leaf-spine architectures. The flat profile also improves bend-radius compliance in tight 90° turns at the top and bottom of vertical managers, where round cables tend to kink or exceed minimum bend radius under bundle pressure. For overhead ladder-rack routing between rows, the reduced diameter lowers weight per linear foot and wind loading on trapeze hangers, while the LSZH jacket's flexibility allows tighter coiling in service loops at patch panel terminations. Installers working in retrofit datacenters with legacy cable trays at 60-80% fill can deploy HD Flex trunks without adding new pathways, significantly reducing project cost and timeline compared to infrastructure expansion.
The assembly's PanMPO female-to-female connectors with Method B polarity are purpose-built for structured connectivity systems using cassette-based breakout modules at the equipment end. Method B uses a key-up to key-down orientation (one end has the key slot on top, the opposite end has the key slot on the bottom), creating a straight-through fiber mapping across the array: fiber 1 on end A maps to fiber 1 on end B, fiber 12 to fiber 12, and so on for 24-fiber arrays. This polarity scheme pairs with Panduit's QuickNet cassette modules, which handle the transmit-receive crossover internally via a mirrored LC adapter arrangement, eliminating the need for field-flipped patch cords or crossover trunks. In a typical spine-leaf deployment, the FWUYL7575LNM041 runs from an MDA (main distribution area) cassette panel to an EDA (equipment distribution area) cassette mounted in the ToR rack; both cassettes present 12 or 24 duplex LC ports on the front, and the trunk handles backbone transmission between cassettes using the full 24-fiber count. Because the connectors are female, they mate with male MTP/MPO adapter modules or male-pinned cassette interfaces, maintaining physical-contact alignment and low insertion loss across the mated pair. The Ultra Insertion Loss performance grade guarantees ≤0.35 dB typical loss per mated connector pair (measured at 850 nm), compared to 0.5-0.75 dB for standard-grade MPO assemblies. On a two-connector channel (one trunk plus two cassettes), this saves 0.3-0.8 dB of link budget, directly extending reach for 100GBASE-SR4 from 70m over OM3 to 100m, or enabling an additional mid-span cross-connect without exceeding the IEEE 802.3 loss budget. The female-to-female configuration also simplifies inventory management: all backbone trunks use the same part-number pattern, and polarity selection is handled at the cassette level rather than stocking Type A, Type B, and Type C trunk variants.
The LSZH jacket compound is a datacenter-grade flame-retardant formulation that meets IEC 60332-3-24 Category C vertical flame spread requirements and IEC 61034 <50% light transmission (smoke density) limits under combustion. Unlike PVC-jacketed cables, which release hydrochloric acid gas and dense black smoke when burned, LSZH cables produce minimal particulate smoke and negligible halogenated gases, reducing the risk of equipment corrosion and toxic exposure during fire evacuation. This jacket is mandatory for under-floor and overhead plenum installations in EMEA, UK, and APAC datacenters governed by IEC-based building codes, and increasingly specified in U.S. facilities pursuing LEED certification or housing mission-critical equipment with strict environmental controls. The lime jacket color provides instant visual identification of OM5 infrastructure per TIA-598-D recommendations (aqua for OM3, magenta or violet for OM4, lime green for OM5), allowing installers and maintenance teams to differentiate fiber types at a glance during adds, moves, or troubleshooting. The cable's overall length of 41 meters (134.5 feet) covers typical datacenter backbone distances: 30-35 meters of horizontal routing from an MDA in a central meet-me room to an end-of-row aggregation rack, plus 6-10 meters of vertical rise and service loop at each termination point. This length also suits inter-aisle connections between core routers in large enterprise datacenters or cross-connect runs between colocation cages in carrier-neutral facilities. The factory-terminated and tested assembly ships with insertion loss and return loss test reports traceable to NIST-certified reference standards, eliminating the need for field fusion splicing, connector polishing, or post-installation OTDR certification. Installers can pull the trunk, plug both ends into cassette modules, and validate link integrity with a simple light source and power meter, reducing installation labor by 60-80% and avoiding the costly rework associated with damaged field-terminated connectors or improper fiber mapping.
The FWUYL7575LNM041 is ideal for greenfield 100G/400G spine-leaf datacenter builds using cassette-based structured cabling, migration projects upgrading 10G leaf switches to 100G while preserving existing OM5 backbone infrastructure, and high-density rack deployments where pathway congestion limits the number of round trunk cables that can be routed through vertical managers. Pair this trunk with Panduit's FMT cassette modules (12-fiber or 24-fiber breakout to duplex LC) for plug-and-play connectivity to QSFP28, QSFP56, or QSFP-DD transceivers, and use lime-jacketed OM5 LC patch cords on the equipment side to maintain the visual identification scheme end-to-end. The assembly's Method B polarity and female-to-female orientation integrate seamlessly with Panduit's QuickNet structured cabling system, ensuring consistent fiber mapping across the channel and eliminating the polarity troubleshooting that accounts for 40-60% of post-installation fiber link failures in traditional field-terminated deployments.
