EFB Keystone Module LC/APC Duplex OS2 Green - Single-mode Fibre Optic Adapter

With an insertion loss of just 0.2 dB and a return loss of 60 dB or better, this EFB Keystone Module delivers near-lossless single-mode fibre connectivity in a compact snap-in form factor. The LC/APC duplex interface, finished in green to match OS2 standards, ensures precise angled physical contact for minimal back reflection in high-speed optical networks.

Overview

The EFB KM53519 is a keystone module designed for fibre optic networking, FTTx deployments, and data centre patching. It accommodates two LC/APC single-mode fibres (duplex) and fits any standard keystone wall plate, patch panel, or surface mount box. The module's zirconia ceramic sleeves provide superior alignment and durability, while the ABS plastic housing offers robust protection in demanding environments.

What stands out

• Angled Physical Contact (APC) polishing for ultra-low back reflection
• Duplex LC connector supports two OS2 single-mode fibres
• Snap-in keystone design for quick and tool-free installation
• Zirconia ceramic sleeves ensure precise fibre alignment and long-term reliability
• Green colour coding for easy identification of APC single-mode connections

Technical details

• Connector type: LC/APC Duplex
• Fibre type: Single-mode OS2
• Insertion loss: ≤ 0.2 dB
• Return loss: ≥ 60 dB
• Sleeve material: Zirconia ceramic
• Housing material: ABS plastic
• Mounting type: Snap-in
• Compatibility: Standard keystone ports
• Operating temperature: -20°C to +70°C
• Storage temperature: -40°C to +85°C
• Standards compliance: IEC 61754-20, TIA/EIA-604

Our verdict

An essential component for any fibre optic installation, the EFB KM53519 combines precision, durability, and ease of use. Its APC polish and zirconia sleeves guarantee top-tier performance, making it a reliable choice for professionals.