Name: FCMJ-8520-3 Finisar 1.25Gbps 1000Base-T RJ-45 Copper SFP 100m Transceiver
Brand: Finisar
SKU: FCMJ-8520-3
Price: 62.83 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The FCMJ-8520-3 Finisar transceiver module provides reliable Gigabit Ethernet connectivity over copper cables and fits into standard SFP ports. It’s used to link network devices in data centers, offices, or telecom racks where copper cabling is preferred or already installed. This module offers a straightforward way to achieve high-speed network connections without the need for fiber optics or complex setups.

General Information
Brand	Finisar
Part Number	FCMJ-8520-3

Technical Information
Form Factor	SFP
Media	Cat 5e/6/6a (UTP)
Protocols	1000Base-T, 1.25Gbps, Gigabit Ethernet
Connector	RJ-45
DOM Support	No

Physical Characteristics
Weight	3.00
Condition	Refurbished

Product Description
The FCMJ-8520-3 is a small form-factor pluggable (SFP) transceiver designed to convert electrical signals into Gigabit Ethernet over copper cabling. It is commonly used in networking equipment where flexibility and ease of installation are important. This transceiver is often found in enterprise switches, routers, and media converters where 1000Base-T connectivity is required. Built for IT professionals and network administrators, this module simplifies network upgrades by allowing existing copper infrastructure to support higher-speed data transmission without replacing cabling. It works well in data centers, offices, and telecommunications setups aiming to maintain or expand Gigabit Ethernet access. Key Features Supports full-duplex Gigabit Ethernet over standard copper cables Compatible with a wide range of network hardware featuring SFP slots Low power consumption for energy-efficient operation Auto-negotiation for seamless integration into existing networks Plug-and-play design reduces setup time and complexity Typically deployed in environments with existing copper wiring, this transceiver extends network reach up to 100 meters without requiring fiber optics. It helps organizations maximize their current infrastructure while upgrading to gigabit speeds, making it a practical choice for many everyday networking needs.

Use Cases
The FCMJ-8520-3 Finisar SFP transceiver is widely utilized in network infrastructures requiring Gigabit Ethernet over existing copper cabling. It is particularly suitable for environments where fiber deployment is impractical or cost-prohibitive, such as enterprise office networks or legacy data center segments. IT teams benefit from its compatibility with standard RJ-45 connectors, enabling seamless integration into established copper-based setups. How It's Used: Connecting servers and switches in SMB IT environments to leverage existing Cat5e/Cat6 cabling without fiber upgrades. Enabling high-speed uplinks in enterprise wiring closets where copper runs are capped at 100 meters. Deploying in telecom racks to link copper-based network equipment for rapid data exchange. Supporting edge computing nodes with cost-effective, reliable Gigabit connectivity over copper. Facilitating network segmentation in campus environments where copper cabling infrastructure is prevalent. This module supports operational continuity by bridging copper network segments with efficient Gigabit performance, allowing networks to scale while minimizing physical infrastructure changes. It enables IT administrators to optimize deployment costs and maintain throughput in mixed media environments.

FCMJ-8520-3 Finisar 1.25Gbps 1000Base-T RJ-45 Copper SFP 100m Transceiver

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases