LC/APC Duplex Fiber Adapter, Single-Mode, Green, 8°, Ceramic Sleeve, Flangeless Clip-In (FOS-LCA-D)

This is a duplex LC/APC fiber adapter for single-mode, the green coupler that joins two pairs of LC/APC connectors end to end through a panel, with the transmit and receive fibers side by side. It's flangeless: a low-profile plastic housing with no mounting ears, in the standard LC duplex footprint, that clips into the cutout on a patch panel, LGX plate, fiber distribution unit, or wall-mount enclosure built for flangeless adapters. Each port has a ceramic alignment sleeve, and the housing is green, which is the color code for the 8° angled polish that keeps back reflection low on PON, CATV, WDM, and other links that can't tolerate light bouncing back toward the transmitter. It takes LC/APC connectors only, on OS1 or OS2 single-mode fiber; a blue LC/UPC connector has a flat end-face and doesn't mate with an angled one. It comes with plastic clips, it's RoHS compliant, and it's sold individually. For the same adapter with flanges, the FOS-LCA-DF, and for four LC/APC ports in an SC duplex cutout, the flanged quad FOS-LCA-QF; for the blue UPC version of this flangeless adapter, the FOS-LCU-D; for the cords, the LCALCASM with LC/APC on both ends and the LCASCASM for LC/APC to SC/APC; for a cord from an APC panel to a UPC switch port, the LCULCASM; for SC/APC, the FOS-SCA-D and FOS-SCA-S adapters and the loaded FAP-SM-SCA-6D plate; for the SC/APC pigtails behind them, the PGTSC12-SMA and PGUSC12-SMA.

Features

• Duplex LC/APC. Two LC ports, single-mode, 8° angled polish, green.
• Ceramic alignment sleeves. Low insertion loss and very low back reflection on both ports.
• Flangeless, clip-in. Low-profile plastic housing; clips into a flangeless cutout.
• LC duplex footprint. Fits the standard LC duplex flangeless slot in a panel, plate, FDU, or enclosure.
• OS1 and OS2. For LC/APC connectors only; not for LC/UPC.
• Plastic clips included.
• RoHS compliant.
• Sold individually.

Where It Fits

It suits a PON or FTTH distribution panel where the ports are LC/APC and the plate takes flangeless adapters, so a worn one comes out and a new one clips in without touching the plate. It suits a CATV or RF-over-fiber head end where a reflective UPC adapter would put noise in the picture, and a WDM or DWDM shelf where the return loss spec rules UPC out and the flangeless footprint packs more pairs across the plate. Installers loading a flangeless LGX plate or a fiber distribution unit for an APC plant use it, and so do techs replacing a cracked adapter in an existing green panel. A metro or wide-area link terminated on LC/APC in a crowded rack is a candidate. It goes with the LC/APC and SC/APC patch cords from the single-mode patch cable collection, with the SC/APC adapter plates and pigtails from the fiber panel collection, and with the fiber cleaners from the test equipment collection. For LC/APC to LC/APC, the LCALCASM. For LC/APC to SC/APC, the LCASCASM. For LC/APC to a UPC port, the LCULCASM. For a flanged cutout, the FOS-LCA-DF, and for four ports in an SC duplex cutout, the FOS-LCA-QF. For a UPC plant, the FOS-LCU-D. For SC/APC, the FOS-SCA-D or FOS-SCA-S, or the loaded FAP-SM-SCA-6D plate. For the SC/APC pigtails, the PGTSC12-SMA and PGUSC12-SMA.

Good to Know

Flangeless or flanged is the first check: a flangeless adapter is held by clips through a cutout sized for its body, and it won't stay in a plate stamped for a flanged adapter, which has a larger opening and screw holes for the ears, so match the adapter to the plate before you order a quantity; the FOS-LCA-DF is the same green duplex for a flanged cutout. Green means APC, and it's a hard rule, not a color preference: an 8° angled ferrule against a flat UPC ferrule leaves an air gap at the end-face, which costs a few dB and sends a reflection back up the fiber, so every connector that goes into this adapter has to be green LC/APC, and the cord at the other end of each port has to match whatever it plugs into. The ceramic sleeve is the right sleeve for single-mode; a phosphor bronze sleeve is a multimode part and doesn't hold a 9 µm core to the tolerance a single-mode link needs. Keep the A and B fibers in the right positions on both sides so the duplex polarity comes out as the as-built says; on a PON, where each drop is one fiber, label which port is which drop. Clean and inspect every ferrule before it goes in, since an APC end-face shows dirt as loss and reflection just like any other, and cap any port without a cord. Don't look into an open port on a live link; a PON or CATV port carries a laser whether or not anything is on the other end.

Specifications

Usually ships the same day.