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Compact SFP transceiver module with matte metal housing and protruding duplex LC optical port

Finisar Corporation

Finisar Corporation FTLF8519P3BNL SFP transceiver 2.125 Gb/s 850 nm LC

SKU CH-7ZAK-R871Y MPN FTLF8519P3BNL

SFP transceiver for 1 Gb/s and 2 Gb/s Fibre Channel or Gigabit Ethernet with LC duplex connector, 850 nm VCSEL and digital diagnostics

  • Port countLC
  • Product typeTransceiver
  • Supported protocolsOptical Gigabit Ethernet Compliant 1 Gb/s Fibre Channel Comp
  • Transfer speed2.125 Gb/s
  • HighlightsUp to 2.125 Gb/s bi-directional data links Hot-pluggable SFP
  • Up to 2.125 Gb/s bi‑directional data links
  • Hot‑pluggable SFP footprint for easy installation
  • Built‑in digital diagnostics via 2‑wire serial bus
  • 850 nm oxide VCSEL on duplex LC connector
  • Up to 500 m reach on 50/125 µm multi‑mode fibre

Network transceiver for 1/2 Gb/s Fibre Channel

The Finisar FTLF8519P3BNL is a hot-pluggable SFP transceiver designed for multi-mode fibre networks. It supports 1 Gb/s and 2 Gb/s Fibre Channel alongside 1000Base-SX Gigabit Ethernet. The module uses an 850 nm oxide VCSEL transmitter with a duplex LC connector for bi-directional data links up to 2.125 Gb/s.

Operating temperature range and digital diagnostics

Rated for continuous operation from -20°C to 85°C, the transceiver handles demanding environmental conditions. Built-in digital diagnostic functions are accessible via the 2-wire serial bus defined in the SFP MSA, allowing real-time monitoring of module parameters. The unit is RoHS compliant and lead-free per Directive 2002/95/EC.

SFP MSA footprint with LC duplex connectivity

The SFP form factor ensures compatibility with a wide range of switches, routers and host bus adapters that accept standard SFP modules. A single duplex LC port connects directly to 50/125 µm or 62.5/125 µm multi-mode fibre cables. Link distances reach up to 500 m on 50/125 µm fibre, making it suitable for short-range data centre and campus links.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $55.99
Cheaper than about 70% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameFinisar Corporation
Model nameFTLF8519P3BNL
Product typeTransceiver
Performance
Transfer speed2.125 Gb/s
Connectivity
Supported protocolsOptical Gigabit Ethernet Compliant
1 Gb/s Fibre Channel Compliant
2 Gb/s Fibre Channel Compliant
Ports & slots
Port countLC
Size & build
Shipping weight0.91 kg
Package size104 × 64 × 23 mm

Questions about this item

How do I install the FTLF8519P3BNL SFP transceiver and what step is often missed?

Insert the module into an SFP MSA slot until it clicks, then connect a duplex LC patch cable matching 50/125 µm or 62.5/125 µm multi-mode fibre; the step often missed is removing the dust caps from both the transceiver and the cable before linking them.

What maintenance or replacement will the FTLF8519P3BNL need over time?

The 850 nm Oxide VCSEL transmitter and receiver optics should be inspected and cleaned with lint-free wipes and isopropyl alcohol whenever links show rising error counts; no user-serviceable parts exist, so a permanent fault means replacing the entire SFP module.

What is the first limit reached on the FTLF8519P3BNL during sustained 2.125 Gb/s operation?

The 500 m reach on 50/125 µm multi-mode fibre is the distance limit; beyond that the optical budget is exhausted and bit errors rise, while the -20 °C to 85 °C case temperature range defines the thermal ceiling.

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