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finisar fclf-8521-3 compatible link-pp 10 100 1000base-t sfp sgmii copper 100m rj45 transceiver module (industrial)
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Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII Copper 100m RJ45 Transceiver Module (Industrial)

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Product summary

Product
Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII Copper 100m RJ45 Transceiver Module (Industrial)
SKU
226236
P/N
LP-RJ451GE-RCI
Price
$ 20.5
Stock
208 in Stock
Sold
4.5K
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
For Order Over $3000 Get $50.00 Off , Code: Linkpp50
For Order Over $5000 Get $100.00 Off , Code: Linkpp100
New Users: $10 Coupon for Orders , Code: linkpp2610
15 Reviews
5 Questions
4.5K Sold
$ 20.5 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
1
$ 20.5
100
$ 19.475
1000
$ 18.86
3000
$ 18.245
6000
$ 17.63
Manufacture: LINK-PP P/N: LP-RJ451GE-RCI SKU: 226236
Compatible P/N:
FCLF-8521-3 | 100m
Shipping:
Free Shipping
to United States via FedEx
Estimated delivery time : 3 - 10 days.
5-Year Warranty 30-Day Returns 30-Day Exchange
Warranty
  • Providing industry-leading 5-year warranty.
  • Read the table for details of all products' warranty.
Returns & Exchange
  • Refunds will be received about 5 business days after the receipt of returned items.
  • Items in stock for replacement can be shipped within 1 business day.
  • Read the full return policy for details.
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Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP Specifications

FCLF-8521-3 is an industrial-grade 10/100/1000BASE-T SFP copper transceiver module that features low power consumption, a fully metallic enclosure to reduce EMI, and a 100-meter transmission range over Cat 5 cable in extreme temperatures from -40°C to +85°C.

Finisar Part NumberFCLF-8521-3Vendor NameLINK-PP
Part Status Active Form Factor SFP SGMII
Max. Data Rate 1.25G Max. Cable Distance 100m
Media Cat 5 Connector RJ-45
RX_LOS Yes DOM Support

No

Operating Temperature Range -40 to 85°C Protocols

SFP MSA Compliant, IEEE Std 802.3

Key Features of Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII

Finisar FCLF-8521-3 Compatible LINK-PP module is an industrial-grade copper transceiver module built for reliable short-range networking in harsh environments. It combines flexible data speed matching, low power consumption, and a rugged design to deliver stable copper connections. 

Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP Copper Module

This module allows technicians to read out vital data directly from the physical layer IC inside the transceiver via a standard 2-wire serial bus. This internal access makes checking connection baselines and troubleshooting physical link issues much simpler. It gives network operators a clear way to see what is happening at the very base of the copper link.

FCLF-8521-3: 1 Gbps Connectivity for Intra-Cabinet Copper Links

The module supports full 1000BASE-T gigabit operation when plugged into host switch systems using a standard SERDES interface. For older or multi-speed systems, it can automatically scale down to 10/100/1000Mbps data rates when working with an SGMII interface. This makes it incredibly easy to link different generations of hardware together inside the same equipment rack.

FCLF-8521-3 Module Supporting 100m Transmission

Designed to bridge local distances easily, this transceiver maintains reliable data transmissions up to 100m using standard Cat 5 network cables. It is built to keep data moving steadily over this distance even while facing harsh industrial heat or cold. This reach is perfect for connecting separate machinery stations across a factory floor without losing signal quality.

FCLF-8521-3 Module with RJ45 Interface

Equipped with a standard RJ45 connector, the module allows you to plug regular copper patch cords right into an open SFP slot. The connector housing is fully metallic, which protects the signal from electromagnetic noise and stops data corruption. It provides a simple, plug-and-play way to make high-density switch ports compatible with traditional Ethernet wires.


Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII Certification

The Finisar FCLF-8521-3 Compatible LINK-PP meets top industry standards, carrying official certifications like ISO 9001, CE, RoHS, and FCC to ensure safety and quality.

Optical Transceivers Testing

Each module undergoes rigorous physical hardware and signal integrity testing to guarantee steady, long-term operation in challenging network environments.

FCLF-8521-3 Quality Certifications

These global safety and environmental approvals verify that the transceiver is built using eco-friendly, lead-free processes that match strict manufacturing guidelines.

FCLF-8521-3 Certified for Reliable Host-Device Compatibility

Broad hardware validation ensures this module works reliably across a wide variety of industrial switch and router platforms without causing link dropouts.


Rigorous Testing Ensures Reliable SFP SGMII Performance

Every copper SFP module undergoes strict quality checks to verify hardware stability before deployment, and you can learn more through the LINK-PP Test Support Center.

Optical

Electrical Performance Test

Verify precise voltage levels and current draw across all ports.

Optical

Eye Pattern Test

Analyze signal waveform integrity to prevent data distortion over copper cables.

Optical

Bit Error Rate Test

Measure data packet loss to guarantee flawless, mistake-free network transmissions.

Optical

Temperature Test

Validate steady signal operation under extreme environmental heat and cold.


Product Shipping for Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII

We secure each transceiver module for safe transit. Every shipment undergoes careful handling to protect your physical hardware.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Sealed in anti-static packaging to prevent electrical damage.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Shock-resistant boxing prevents physical impact damage.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Orders are verified and processed rapidly for prompt transit.

Global Logistics and International Delivery

Global Logistics and International Delivery

Dependable worldwide shipping via trusted global carriers.

Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII Usage Demonstration

Using this FCLF-8521-3 hot-swappable copper SFP module is entirely plug-and-play. Just insert the unit into your switch, secure the metallic latch, and connect your copper line to establish an immediate link, allowing easy on-site maintenance without interrupting the rest of your active network.

FCLF-8521-3 Technical Support

LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.

Pre-Sales Technical Consultation

Pre-Sales Technical Consultation

Professional guidance to help you select the optimal FCLF-8521-3 module for your network design and application needs.

Compatibility Verification Support

Compatibility Verification Support

Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.

Deployment & Installation Assistance

Deployment & Installation Assistance

Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.

Long-Term Technical Assurance

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.

Finisar FCLF-8521-3 Compatible LINK-PP 10/100/1000BASE-T SFP SGMII After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15 days

15-day no-reason return and refund

Free maintenance or replacement

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free maintenance

 Free repair services for manufacturing defects throughout the warranty period

Limitations

Warranty exclusions and conditions apply

LINK-PP

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G***r
South Africa
Verified Purchase
5 .0
2026-04-25
Bridging legacy copper security hardware to modern optical edge routers can be tricky, but this copper transceiver module solved our interface conversion needs effortlessly. Operating on a host switch with SGMII support, it auto-negotiated smoothly across 10Mbps, 100Mbps, and 1000Mbps modes without requiring manual port speed overrides. The hot-pluggable SFP footprint allowed us to perform live swaps during maintenance windows with zero downtime on adjacent interfaces. It provides a rock-solid, plug-and-play copper port expansion solution for any network engineer managing mixed-speed hardware environments.
M***p
Japan
Verified Purchase
5 .0
2026-04-02
Great for office LAN upgrades. 10/100/1000 auto-negotiation is smooth.
F***n
Spain
Verified Purchase
5 .0
2026-03-18
We integrate these copper modules into DIN-rail industrial switches inside factory automation cabinets. High EMI resistance and low power consumption keep thermal buildup inside the sealed box very low. Essential component for automation systems!
C***r
United Kingdom
Verified Purchase
5 .0
2026-02-08
We subjected a batch of LINK-PP LP-RJ451GE-RCI copper transceivers to a 72-hour continuous stress test across our multi-vendor test bench to evaluate line-rate throughput and thermal behavior. The modules delivered full 1.25Gb/s bi-directional data links with zero frame drops, while the SGMII interface handled dynamic 10/100/1000Mbps auto-negotiation flawlessly when connected to legacy endpoints. The fully metallic enclosure dissipated heat efficiently, keeping case temperatures well within safe limits even in high-density rack configurations. Additionally, monitoring physical layer IC parameters via the 2-wire serial bus gave us complete real-time visibility into link health.
B***g
Thailand
Verified Purchase
5 .0
2026-01-20
Solid build quality, metal housing. Feels like enterprise gear, not a cheap clone.
D***s
United States
Verified Purchase
5 .0
2025-12-03
A lot of cheap copper SFPs struggle with legacy 10M/100M devices, but this LINK-PP SGMII copper SFP module handles multi-rate auto-negotiation without a hitch. Tested on old IP security cameras and modern rack servers alike.
J***r
Iran, Islamic Republic of
Verified Purchase
5 .0
2025-10-27
Upgraded our SMB network topology to bridge a fiber switch to a copper router. This SGMII RJ45 SFP module handled the conversion effortlessly. Great cost savings compared to OEM original parts.
E***n
Republic of Korea
Verified Purchase
5 .0
2025-09-22
Hot-plugging works cleanly in our rack server SFP ports. The operating system recognized the copper interface immediately. LINK-PP LP-RJ451GE-RCI copper module is top tier!
H***t
Germany
Verified Purchase
5 .0
2025-08-11
Ideal for industrial control networks. -40 to 85°C range is accurate, the module stayed cool in our 70°C enclosure.
K***d
Bangladesh
Verified Purchase
4 .0
2025-08-03
The transceiver module itself works flawlessly on our enterprise edge switch, locking into a full 1G copper link immediately over an 80m Cat5 run. However, local courier transit took two days longer than estimated. Product performance is a solid 5 stars, but giving 4 stars due to the shipping lag.
A***e
New Zealand
Verified Purchase
5 .0
2025-07-04
Used these modules to connect building distribution switches over existing Cat5 trunking lines up to 100m. Reached full gigabit capacity with negligible packet loss. LINK-PP delivers consistent quality.
T***l
Canada
Verified Purchase
5 .0
2025-06-29
Used in our outdoor cabinet for base station backhaul. Survived a heatwave with no throttling.
D***e
Russian Federation
Verified Purchase
4 .0
2025-05-27
Installed this SGMII copper module into our rack server for a live network upgrade and it auto-negotiated perfectly with zero frame drops. The only hiccup was international customs processing, which added a 3-day delay to our shipment. Plan ahead for logistics, but the transceiver itself is top tier.
C***n
Belgium
Verified Purchase
5 .0
2025-04-15
Replaced an expensive brand-name module with this 100m copper SFP. Recognized by our network OS without any vendor incompatibility warnings. Low latency and zero frame drops after 72 hours of heavy traffic simulation.
D***s
Israel
Verified Purchase
5 .0
2025-03-10
Operating remote cell tower backhaul enclosures requires hardware built for environmental extremes, which is why we deployed these industrial-grade copper SFP modules across our field sites. The -40°C to +85°C operating case temperature rating proved its worth during severe seasonal swings, preventing link flaps during freezing cold snaps and mid-summer heatwaves alike. The compact RJ-45 connector latch held firmly against ongoing mechanical vibration from cabinet cooling fans. With low power dissipation, the transceivers avoided thermal buildup in our sealed outdoor boxes, making them essential components for rugged network extensions.
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