Hubbell DFHPCLCASCAS3SM LC/APC to SC/APC Plenum SingleMode Duplex Fiber Patch Cord

The Hubbell DFHPCLCASCAS3SM is a 2-meter, plenum-rated, singlemode duplex fiber optic patch cord terminated with LC/APC connectors on one end and SC/APC connectors on the other. It is built for environments where the NEC requires low-smoke, low-flame jacket materials — specifically air-handling spaces, above-ceiling cable trays, and raised-floor plenums in commercial and enterprise facilities. The yellow jacket is the industry-standard visual identifier for singlemode fiber, making fiber-type verification fast during moves, adds, and changes in high-density patching environments.

Overview

APC (Angled Physical Contact) connectors on both ends are the key differentiator here. The 8-degree angled ferrule reduces back-reflection to -65 dB or better, compared to roughly -55 dB for UPC connectors — a meaningful gap in applications where return loss directly affects system performance. Singlemode fiber patch cords with APC terminations are the standard specification for PON (passive optical network) infrastructure, DWDM systems, and long-haul backbone runs where reflected light causes signal degradation and equipment sensitivity issues. If your head-end equipment specifies APC — and most current GPON and XGS-PON ONTs do — the DFHPCLCASCAS3SM matches that requirement without requiring an adapter that would add another insertion-loss point.

The duplex configuration means both fibers travel in a single, bonded jacket assembly rather than as two loose simplex cords. In active equipment connections — SFP transceivers, media converters, managed switches, NVRs with fiber uplinks — duplex is the standard physical format. The bonded jacket also reduces cable management clutter in fiber patch panels and keeps transmit/receive pairs physically organized, which matters when you are tracing circuits under live traffic conditions.

Key Features

• Plenum (CMP) Jacket Rating: The plenum-rated jacket meets NEC Article 770 requirements for installation in air-handling spaces without conduit. This is not optional in most commercial builds — AHJs enforce it, and installing riser-rated (CMR) or general-purpose cable in a plenum space is a code violation that triggers remediation. Specifying the DFHPCLCASCAS3SM from the start avoids a costly re-pull.
• APC Connectors (Both Ends): The 8-degree angled polish returns -65 dB or lower back-reflection, keeping reflected light out of laser sources. This matters on EDFA-amplified links and coherent optics where reflected power can cause laser instability and bit errors. Do not substitute UPC patch cords on APC-terminated infrastructure — the physical mismatch causes insertion loss spikes and voids the optical budget on the link.
• Singlemode Fiber (OS2): Singlemode supports wavelengths from 1260 nm to 1625 nm and is the correct choice for backbone runs between IDF and MDF closets, campus fiber rings, and any link using CWDM or DWDM multiplexing. If your run is under 100 meters and cost is a constraint, multimode OM3/OM4 may be more appropriate — but if the infrastructure on either end is already singlemode, this cord maintains the optical continuity of the link.
• LC to SC Connector Pairing: The LC/APC-to-SC/APC configuration bridges LC-terminated equipment (SFP cages on switches, routers, and NVRs) to SC-terminated patch panels or wall plates that are common in legacy and mid-tier enterprise fiber infrastructure. Rather than running a coupler and two same-end cords — which adds two connector interfaces and their associated insertion loss — this hybrid cord handles the transition in a single run.
• 2-Meter Length: At 2 meters, this cord is sized for within-cabinet or adjacent-rack patching — connecting an active device in one rack unit to a fiber patch panel two to four rack units away, or bridging equipment across a short intra-cabinet span. Measure before ordering; fiber patch cords should not be looped or coiled tightly, and excess slack creates management issues in high-density panels. If the run is longer than 2 meters, plan accordingly with the correct length variant.
• Yellow Jacket — Singlemode Visual Identification: Yellow is the TIA-598-C and ISO/IEC 11801 standard color for singlemode fiber. In mixed-fiber environments where both singlemode and multimode (aqua OM3, orange OM1/OM2, violet OM4) cords terminate at the same panel, color coding is the first line of defense against mispatching. Plugging a singlemode cord into a multimode-optimized transceiver — or vice versa — causes immediate link failure or severe performance degradation.

Integration and Compatibility

The DFHPCLCASCAS3SM connects to any LC-duplex APC interface on the equipment side — SFP/SFP+ cages on managed network switches, fiber uplink ports on NVRs, media converters, and WDM multiplexers — and terminates at any SC-duplex APC receptacle on the plant side. Confirm APC (green connector body or angled ferrule) versus UPC (blue connector body) on both ends of your link before ordering. Mixing APC and UPC on the same connection is a physical incompatibility that causes elevated insertion loss and must be avoided. For installations that include PoE fiber-uplink switches or fiber-connected NVRs in surveillance infrastructure, verify the SFP module installed in the equipment specifies APC receptacles before deploying this cord.

Hubbell's fiber patch cord line is built to TIA-568 performance standards. Consult the structured cabling category for compatible keystone jacks, patch panels, and enclosures from the same product family if you are building out a complete fiber termination solution.

Frequently Asked Questions

Q: What does the APC connector designation mean, and why does it matter for my installation?

A: APC stands for Angled Physical Contact — the ferrule is polished at an 8-degree angle, which reflects light back at an angle rather than straight back into the fiber core. This reduces back-reflection to -65 dB or lower, versus approximately -55 dB for standard UPC connectors. In laser-based systems (GPON, DWDM, coherent optics), lower back-reflection improves link stability and reduces bit errors. APC connectors are typically identified by a green connector body. Do not mix APC and UPC connectors on the same link — the physical geometry mismatch causes insertion loss spikes.

Q: Is the DFHPCLCASCAS3SM safe to install in ceiling plenums without conduit?

A: Yes. The plenum-rated (CMP) jacket meets NEC Article 770 requirements for installation in air-handling spaces — above drop ceilings, in raised floors used as return air plenums, and in HVAC supply plenums — without requiring conduit. Always verify local AHJ requirements, as some jurisdictions impose additional restrictions, but CMP-rated cable is the standard specification for these environments in most U.S. commercial construction.

Q: Why is this cord yellow? Does the jacket color affect performance?

A: No — jacket color does not affect optical performance. Yellow is the TIA-598-C and ISO/IEC 11801 standard color code for singlemode fiber, used universally to distinguish singlemode cords from multimode variants (aqua for OM3, orange for OM1/OM2, violet for OM4). The yellow jacket is a visual management aid that helps technicians identify fiber type at a glance and avoid mispatching in mixed-fiber environments.

Q: Can I use this cord to connect an LC UPC port to an SC APC port?

A: No. The DFHPCLCASCAS3SM is terminated with APC connectors on both ends (LC/APC and SC/APC). Connecting an APC ferrule to a UPC receptacle — or vice versa — creates a physical mismatch that causes elevated insertion loss and is not recommended. If one end of your link is UPC-terminated, you need a cord with matching UPC termination on that end, or a dedicated APC-to-UPC hybrid adapter (with the understanding that this introduces additional loss at that interface).

Q: Is 2 meters long enough for my application?

A: The 2-meter length is designed for within-cabinet or short intra-rack patching — typically connecting an active device (switch, NVR, media converter) to a fiber patch panel 2–4 rack units away in the same cabinet or an immediately adjacent one. For longer runs or cross-rack connections, measure the actual routing distance including bend radius allowance before specifying this cord. Do not loop or coil excess fiber tightly, as sharp bends exceed the minimum bend radius and cause insertion loss increases.

Eden Phillips

The spec that drives every purchasing decision on this cord is the APC termination on both ends — and the DFHPCLCASCAS3SM delivers LC/APC-to-SC/APC in a plenum-rated assembly that covers the two most common infrastructure pain points in a single part number: back-reflection management and NEC-compliant jacket material for air-handling spaces.

Technical Highlights:

• APC Polish on Both Ends: Back-reflection at -65 dB or better keeps reflected light out of laser diodes — critical on GPON ONT connections and DWDM head-end equipment where return loss directly affects transmitter stability and BER.
• Plenum (CMP) Jacket: Installs above drop ceilings and in raised-floor air returns without conduit, satisfying NEC Article 770 and eliminating the cost and schedule risk of a jacket-violation re-pull during final inspection.
• LC/APC to SC/APC Hybrid Configuration: Bridges SFP-cage active equipment to SC-terminated legacy plant in a single cord — no coupler, no extra connector interface, no added insertion loss budget consumed by a mid-link adapter.

Deployment Considerations:

• Verify APC versus UPC on every port before installing — green connector body indicates APC, blue indicates UPC. An APC-to-UPC mismatch on a live link causes insertion loss high enough to drop the link entirely on sensitive transceivers.
• At 2 meters, this cord is sized for intra-cabinet or short intra-rack runs only. If your fiber patch panel and active equipment are in separate racks with any routing distance, measure before you order — excess cord looped in a panel exceeds minimum bend radius and causes measurable insertion loss increases.

The DFHPCLCASCAS3SM is the right specification call for MDF-to-active-equipment patching in enterprise and commercial campus environments where the horizontal cable plant is already APC-terminated and the ceiling space requires CMP-rated materials — the combination of APC polish and plenum jacket in one cord covers both the optical and code requirements without compromise.