LC/UPC Duplex Fiber Adapter, Single-Mode, Blue, Ceramic Sleeve, Flangeless Clip-In (FOS-LCU-D)

This is a duplex LC/UPC fiber adapter for single-mode, the blue coupler that joins two pairs of LC/UPC 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 blue, which is the color code for single-mode UPC. It takes LC/UPC connectors on OS1 or OS2 single-mode fiber; a green LC/APC connector has an angled end-face and doesn't mate with it. It comes with clips and dust caps, it's RoHS compliant, and it's sold individually. For a plate already loaded with duplex LC single-mode adapters, the FAP-SM-LCU-6DF with six, or 24 ports on the quad FAP-SM-LCU-6Q; for the cords, the LCLCSM with LC on both ends and the LCSCSM for LC to an SC port; for the pigtails behind the panel, the PGTLC6-SM and PGTLC12-SM; for a wall plate, the KEYLCSM-WHI LC keystone; for the green APC version, the flanged FOS-LCA-DF; for the same blue single-mode on SC, the FOS-SCU-D and FOS-SCU-S.

Features

• Duplex LC/UPC. Two LC ports, single-mode, blue.
• Ceramic alignment sleeves. Low loss and 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/UPC connectors; not for LC/APC.
• Clips and dust caps included.
• RoHS compliant.
• Sold individually.

Where It Fits

It suits a data center or a telecom room where a single-mode backbone is spliced to LC pigtails in the tray behind a panel and the plate takes flangeless adapters, so a worn one comes out and a new one clips in. It suits a high-density enclosure where the flangeless footprint packs more LC pairs across a plate than a flanged adapter would. Installers loading a flangeless LGX plate or a fiber distribution unit port by port use it, and so do techs replacing a cracked adapter in an existing LC panel without touching the plate. A metro or wide-area link terminated on LC/UPC in a server rack is a candidate. It goes with the single-mode LC patch cords from the fiber patch cable collection, with the LC pigtails, adapter plates, and keystones from the fiber panel collection, and with the rack-mount and wall-mount enclosures. For a loaded plate, the FAP-SM-LCU-6DF or the quad FAP-SM-LCU-6Q. For the cords, the LCLCSM, and for LC to SC, the LCSCSM. For the pigtails, the PGTLC6-SM and PGTLC12-SM. For a wall plate, the KEYLCSM-WHI. For an APC plant, the FOS-LCA-DF, and for SC, the FOS-SCU-D.

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. Blue means single-mode UPC, and the adapter will mate whatever LC connector goes into it, including a beige or aqua multimode cord, with the loss of a 50 µm core feeding a 9 µm one landing right at the panel; keep single-mode on blue adapters and multimode on beige, and let the connector color be the cue. It's UPC, with a flat end-face, for the blue LC/UPC connector on nearly every SFP, SFP+, cord, and pigtail; a green LC/APC connector has an 8° angle, and the two leave an air gap that costs a few dB and sends a reflection back up the fiber, so an APC plant needs the green FOS-LCA-DF instead. 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. Clean and inspect every ferrule before it goes in, and leave the dust caps in any port without a cord, since an open single-mode port collects dust that shows up as loss. Don't look into an open port on a live link. It usually ships in 1 to 2 business days.

Specifications

Usually ships in 1 - 2 business days.