Panduit FHCZA-24-10U HD Flex™ OM4 Fiber Cassette

The Panduit FHCZA-24-10U HD Flex fiber cassette delivers ultra-low-loss 24-fiber breakout in a compact, rack-mount form factor engineered for 40G/100G data center spine-leaf architectures. This cassette transitions two MPO-12 male trunk connectors to twelve duplex LC interfaces using OM4 laser-optimized 50µm multimode fiber with ultra-low insertion loss performance that extends reach and preserves link budget in high-speed parallel optics deployments. Universal polarity design supports Method A, B, or C configurations without field re-termination, while ceramic zirconia ferrules ensure <0.15 dB typical IL across all 24 fibers. Purpose-built for Panduit FHD-series enclosures in enterprise campus backbones, colocation meet-me rooms, and hyperscale structured cabling systems.

Key Features

• 24-Fiber OM4 Breakout Architecture — Two MPO-12 male trunk ports break out to twelve duplex LC interfaces, delivering 24 fibers of OM4 multimode connectivity in a single cassette module for maximum rack density
• Ultra-Low Insertion Loss — Factory-terminated with grade-B ferrule endface geometry and precision alignment sleeves to achieve typical IL <0.15 dB per mated pair, preserving link budget for extended 40GBASE-SR4 and 100GBASE-SR4 reach
• Universal Polarity Compatible — Supports TIA-568 Method A (straight-through key-up/key-down), Method B (A-to-B crossover), and Method C (pairs flipped) without field modification, enabling flexible trunk cable polarity management
• OM4 Laser-Optimized Fiber — 50µm core diameter with 850nm VCSEL optimization delivers 400 m at 40 Gb/s (40GBASE-SR4) and 150 m at 100 Gb/s (100GBASE-SR4) per TIA-568.3-D, supporting current and future parallel optics speeds
• Ceramic Zirconia Ferrules — Split-sleeve LC duplex connectors use ceramic zirconia ferrules with 1.25 mm diameter for minimal insertion loss variation across temperature cycling and 500+ mating cycles
• 10U Rack Form Factor — Mounts in Panduit FHD fiber enclosures with 10U vertical pitch for organized cassette stacking in 19" and 23" rack systems
• HD Flex System Integration — Part of Panduit's modular HD Flex cassette-based fiber platform, field-swappable with other HD Flex modules (OM3/OS2/MTP) for mixed-mode enclosure population
• Factory Pre-Terminated — Arrives with all 24 fibers fusion-spliced and connector-polished at Panduit facility, eliminating field termination labor and endface defect risk on-site
• Black Housing — Matte black thermoplastic cassette body with laser-etched port labels for low-light rack visibility and professional aesthetics in customer-facing spaces
• 10-Pack Carton Quantity — Supplied in bulk cartons of 10 cassettes for efficient material staging on large structured cabling installations and data center fit-outs

The FHCZA-24-10U cassette solves the fundamental data center challenge of migrating from high-fiber-count MPO backbone trunks to structured LC patch field interfaces without sacrificing performance or density. In spine-leaf network designs, 40G and 100G parallel optics transceivers (QSFP+/QSFP28) typically connect via MPO trunk cables to inter-building pathways or vertical riser shafts, then break out to individual LC duplex drops at each rack or row for server/storage connectivity. This cassette performs that breakout function inside a Panduit FHD enclosure, presenting twelve clean duplex LC ports on the front panel while accepting two pre-terminated MPO-12 trunks on the rear. The OM4 fiber inside is laser-optimized 50µm core multimode with effective modal bandwidth (EMBc) ≥4700 MHz·km at 850 nm, allowing 40GBASE-SR4 links to span 400 meters and 100GBASE-SR4 to reach 150 meters per IEEE 802.3ba — well beyond typical intra-building horizontal distances. Ultra-low insertion loss is critical in these parallel optics applications because each QSFP transceiver drives four or ten fiber lanes simultaneously; even 0.2 dB additional loss per connection can push marginal lanes below the receiver sensitivity threshold on fully-loaded 100-meter links. Panduit's ULL cassettes achieve <0.15 dB typical IL (≤0.35 dB max per TIA-568.3-D) through precision ferrule endface radius control, co-planarity <50 nm, and apex offset <50 µm, paired with grade-A ceramic alignment sleeves that maintain concentricity under thermal cycling from -40°C to +75°C.

Universal polarity support means this cassette works with any TIA-568 trunk cable polarity method without field rework or adapter modules. In Method A (key-up to key-up straight), the cassette's internal fiber mapping presents position 1 on the MPO trunk as fiber A on LC port 1, position 2 as fiber B on LC port 1, and so forth in sequential order — ideal for array-style breakout panels. Method B (key-up to key-down) applications reverse the trunk mapping so position 1 becomes fiber A on LC port 12, enabling A-to-B crossover trunks common in switch-to-switch 40G links. Method C (pairs-flipped) supports Cisco/Juniper legacy installations where fiber pairs swap positions within each duplex channel. This flexibility eliminates the cassette SKU explosion that plagued earlier-generation fiber systems, letting installers stock a single part number and adapt to discovered polarity in the field. Deployment workflow is straightforward: mount the FHD enclosure in the rack, slide cassettes into numbered slots (up to 12 per 2U FHD enclosure for 288-fiber capacity), route pre-terminated MPO trunk cables from the rear cable management tray to cassette MPO ports, then dress LC jumpers from cassette front ports to switch faceplates. No epoxy, no polish, no insertion-loss testing per connection — factory performance is guaranteed and traceable via Panduit's per-cassette serial number and test report. Cable management is inherent in the cassette design: MPO trunks stay dressed in the rear horizontal manager, LC patch cords route forward through the enclosure's front cable guide, and the cassette itself acts as a physical barrier preventing jumper slack from migrating into the trunk zone.

The FHCZA-24-10U meets TIA-568.3-D Category OM4 multimode fiber specifications for chromatic dispersion, numerical aperture (0.200 ± 0.015), and overfilled launch bandwidth, and complies with ISO/IEC 11801-1 OF-500 (OM4 equivalent) cabling standards for international deployments. When combined with Panduit FHD enclosures, HD Flex MPO trunk cables, and OptiCam LC connectors in a complete channel, the assembly qualifies for Panduit's integrated system warranty covering material and performance for the life of the installation — a critical risk-transfer mechanism for mission-critical finance, healthcare, and hyperscale builds where downtime costs exceed hardware replacement by 100:1. The 10-pack carton quantity (versus single-unit packaging) is purpose-designed for contractors staging material across 20+ racks in a single data hall; bulk packaging reduces per-unit cost, minimizes cardboard waste on-site, and ensures SKU consistency when cassettes are installed in adjacent enclosures that must maintain identical pinouts for future troubleshooting. For large enterprise campus backbone refreshes migrating from 10G to 40G uplinks, or colocation providers lighting 100G meet-me room cross-connects to tenant cage handoffs, this cassette is the field-proven migration point between MPO trunk infrastructure and the LC duplex patch field that end-users and network teams expect to see at the rack.