LC/APC Duplex Fiber Adapter, Single-Mode, Green, Ceramic Sleeve, Flanged, SC Simplex Footprint (FOS-LCA-DF)

This is a duplex LC/APC fiber adapter for single-mode, the green coupler that joins two LC/APC connectors end to end through a panel. It's a plastic housing with integrated flanges and a snap-fit body in the SC simplex footprint, so it drops into the same cutout as a simplex SC adapter and gives two LC ports in that space. 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's RoHS compliant, and it's sold individually. 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 in a loaded LGX plate, the FAP-SM-SCA-6D, FAP-SM-SCA-3D, and FAP-SM-SCA-6S; 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 low back reflection on both ports.
• SC simplex footprint. Fits any SC simplex cutout in a panel, plate, or enclosure.
• Flanged, snap-fit. Plastic housing with integrated mounting flanges.
• OS1 and OS2. For LC/APC connectors only; not for LC/UPC.
• RoHS compliant.
• Sold individually.

Where It Fits

It suits a PON or FTTH distribution panel where the OLT, the splitters, and the drops are all on APC and every port has to be green. 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. Installers loading a custom LGX plate or a wall-mount enclosure with APC ports use it, and so do techs replacing a worn adapter in a fiber distribution unit without changing the plate. A metro or backbone link terminated on APC in an equipment room 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, and SC/APC to a UPC port, the LCUSCASM. For a loaded SC/APC plate instead of building one, the FAP-SM-SCA-6D, FAP-SM-SCA-3D, or FAP-SM-SCA-6S. For the SC/APC pigtails, the PGTSC12-SMA and PGUSC12-SMA.

Good to Know

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. It's an SC simplex footprint, so it goes where a simplex SC adapter goes and gives two LC ports instead of one, which is how an SC plate becomes an LC plate without a new plate; the flanges have screw holes, and the pictures show it with clips as well, so check which mounting the cutout wants. 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 keep a dust cap in any port without a cord. Keep the A and B fibers in the right positions on both sides so the duplex polarity comes out as the as-built says. Don't look into an open port on a live link; APC or not, the laser is there.

Specifications

Usually ships the same day.