Panduit FY9WP77B005F131 48-Fiber Singlemode Plenum Trunk Cable Assembly
Overview
The Panduit FY9WP77B005F131 is a pre-terminated 48-fiber singlemode indoor trunk cable assembly from the QuickNet™ HD Flex sub-brand, sized at 131 feet (39.9 meters) and terminated with ST connectors on both ends. It's built for data centers, telecommunications rooms, entrance facilities, and equipment distribution areas where you need to eliminate field termination time and get structured fiber infrastructure commissioned in a single pull. The red jacket makes zone identification straightforward in high-density trays and conduit runs where color coding by circuit or pathway is part of your labeling discipline.
This assembly carries a Plenum (OFNP) flammability rating, which means it's rated for installation in air-handling spaces — suspended ceilings, raised floors, and other plenum plenums where NEC requires low-smoke, low-flame-spread materials. If your data center or telecom room has HVAC return-air pathways above or below the cable runs, the FY9WP77B005F131 satisfies that code requirement without needing a conduit sleeve workaround.
Key Features
- 48-Fiber Singlemode Core: Forty-eight individual singlemode fibers in a single trunk give you dense backbone capacity without multiplying pull counts. In a core-to-distribution or MDA-to-HDA run, that's enough strands to support 48 individual 10G/25G links, 12 parallel MTP-breakout legs of four fibers each, or high-count LC-duplex patch panels — useful when planning for growth without re-pulling backbone.
- Pre-Terminated with Pulling-Eye Ends: Factory-terminated assemblies with a stranded pulling-eye end eliminate field splicing and termination labor. The pulling-eye construction lets you draw the assembly through conduit without stressing the fiber bundle or connector ferrules — a detail that matters on 131-foot runs through occupied facilities where re-pulling isn't an option.
- ST Connector Termination: ST connectors are a bayonet-style push-twist interface common in legacy and mid-generation telecom infrastructure. If your patch panels, switches, or fiber distribution frames already use ST ports, this assembly lands directly without adapter sleeves or hybrid cords. Note that ST is a single-fiber connector: each of the 48 fibers terminates individually, which affects fan-out planning in your distribution frame layout.
- 131 ft (39.9 m) Standardized Length: At just under 40 meters, this assembly fits the typical MDA-to-HDA or IDF-to-MDF horizontal segment in mid-size data centers and telecom rooms without custom cutting. Pre-determined lengths simplify BOM accuracy and reduce on-site waste compared to bulk spooled cable.
- Plenum (OFNP) Flammability Rating: OFNP is the highest fiber cable fire rating under NEC Article 770. It's required — not optional — in any installation where cables run through air-handling spaces. Using non-plenum cable in a plenum space is a code violation and a liability; this assembly closes that gap without the cost of conduit throughout the run.
- Red Jacket — Visual Zone Identification: Color-coded red jacket supports structured color-discipline in dense pathways. If your site uses color coding to distinguish backbone tiers, directions, or building segments, red immediately communicates identity on a cable tray without pulling tags or reading labels under low light.
- QuickNet™ HD Flex Sub-Brand: Panduit's QuickNet HD Flex line is positioned for high-density deployments where pull flexibility and connector density are the primary constraints. The HD Flex construction is designed to navigate tighter bend radii and congested pathways compared to standard trunk designs — relevant in retrofits and fully populated racks where routing space is limited.
Integration & Compatibility
The FY9WP77B005F131 is a singlemode assembly, which pairs with singlemode transceivers and active equipment — verify that your switches, media converters, or fiber patch panels specify OS1 or OS2 singlemode compatibility before ordering. ST connectors are not interchangeable with LC, SC, or MPO ports without hybrid adapters; confirm your termination points accept ST before specifying this assembly. The OFNP rating is compatible with plenum, riser, and general-purpose installation environments — it's the most permissive rating, so it installs anywhere a lower-rated cable would be allowed. This assembly is suited for fiber optic trunk cable infrastructure across Panduit's structured cabling line, and integrates cleanly into fiber patch panel termination schemes used in enterprise distribution frames. For planning multi-leg backbone architectures, consult a cable management layout guide to confirm tray fill and bend radius clearances for 48-fiber assemblies at this diameter.
Frequently Asked Questions
Q: What fiber type does the FY9WP77B005F131 use — OS1 or OS2?
A: The FY9WP77B005F131 is specified as singlemode. The source evidence does not differentiate OS1 vs OS2 sub-type; verify with Panduit's full product datasheet if your design requires a specific ITU-T G.652 or G.657 designation.
Q: Can the FY9WP77B005F131 be installed in a riser-rated (non-plenum) pathway?
A: Yes. Plenum (OFNP) is the highest fiber fire rating under NEC Article 770. An OFNP-rated cable is permitted wherever a riser (OFNR) or general-purpose cable would be allowed — it satisfies both environments without substitution.
Q: Are the ST connectors on both ends, or is one end a different connector type?
A: The evidence identifies ST as the connector type for this assembly. The description references a pulling-eye end at one side for installation — once pulled through conduit, both active termination ends are ST. Confirm end-to-end connector scheme with the full Panduit product spec if your design requires verification.
Q: Is 131 feet the usable fiber length, or does it include the pulling-eye tail?
A: The overall length is specified as 131.0 ft (39.9 m). Factor in any pulling-eye end trim when measuring usable slack at the termination point — allow for service loop and panel dress in your segment length calculation.
Q: Does the FY9WP77B005F131 work with multimode transceivers or active equipment?
A: No. This is a singlemode fiber assembly. Mixing singlemode fiber with multimode transceivers causes severe optical loss and link failure. Pair only with singlemode (OS1/OS2) transceivers and singlemode-compatible patch panels.
Q: What is the jacket color, and does Panduit offer this assembly in other colors?
A: The FY9WP77B005F131 has a red jacket. Other color variants may exist in the QuickNet HD Flex family under different model numbers; this listing covers the red variant only.
The FY9WP77B005F131 is a detail-oriented specification purchase — 48 singlemode fibers, ST-terminated, at exactly 131 feet with a plenum OFNP jacket and a pulling-eye end for clean conduit installation. When I see this assembly specified, it's almost always a retrofit or expansion scenario in a facility where the patch panels and distribution frames are already ST-based and re-terminating in the field isn't acceptable.
Technical Highlights:
- 48-Fiber Density at 131 ft: Forty-eight singlemode fibers in a single pull at 39.9 meters covers the majority of MDA-to-HDA or IDF-to-MDF horizontal backbone distances without custom cutting — reducing BOM complexity and eliminating field splice labor.
- Plenum (OFNP) Rating: OFNP is the ceiling of NEC Article 770 fire ratings. Installing this in any air-handling space is fully code-compliant with no conduit workaround required — and because OFNP is upward-compatible, it substitutes cleanly for riser or general-purpose ratings wherever you have mixed pathway types.
- Pulling-Eye End Construction: The stranded pulling-eye is a practical installation detail on a 131-foot assembly — it distributes pull tension across the cable jacket rather than the fiber bundle or connector ferrules, which is how you avoid pre-commission optical loss on a long in-conduit pull.
Deployment Considerations:
- ST is a single-fiber bayonet connector — each of the 48 fibers terminates individually. Plan your patch panel real estate and fan-out layout accordingly; 48 ST ports occupy significantly more panel space than 24 LC-duplex or 12 MPO ports carrying the same fiber count.
- Singlemode fiber requires singlemode transceivers at both ends — OS1/OS2 compatible equipment only. A common field error is connecting singlemode trunk assemblies to multimode-designated switch ports; the link will not function and the cause isn't always obvious without an optical power meter on site.
This assembly is the right call for data center backbone refreshes and telecom room builds where the termination infrastructure is already ST-based, air-handling pathways require OFNP, and the 131-foot segment length matches your MDA-to-HDA span — particularly in enterprise campuses doing phased structured cabling upgrades rather than a full rip-and-replace.
