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Finisar FTLF8519F2GTL 1000BASE-SX SFF 2x5 850nm 550m
up to 2.125 Gb/s 1000BASE-SX / 1G-2G FC (2.125G) SFF 2x5 transceiver, 850nm, up to 550m, industrial (−40 to 85 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLF8519F2GTL
- Family
- FTLF8519F2
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLF8519F2GTL datasheet (PDF)
FTLF8519F2GTL specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLF8519F2GTL |
| Product family | FTLF8519F2 |
| Form factor | SFF 2x5 |
| Standards / application | IEEE 802.3 Gigabit Ethernet; FC-PI-2 10.0 |
| Data rate | 1.0625 / 1.25 / 2.125 Gb/s |
| Wavelength | 830–860 nm |
| Laser | 850 nm oxide VCSEL |
| Reach | 50/125 µm MMF: 500 m @ 1.0625 Gb/s, 300 m @ 2.125 Gb/s; 62.5/125 µm MMF: 300 m @ 1.0625 Gb/s, 150 m @ 2.125 Gb/s |
| Connector | Duplex LC |
| Tx output power | −9 to −3 dBm |
| Rx sensitivity | −20 dBm @ 1.0625/1.25 Gb/s; −18 dBm @ 2.125 Gb/s |
| Rx overload / max input | 0 dBm |
| Extinction ratio | 9 dB (1.25 Gb/s) |
| Supply voltage | 3.3 V (3.0–3.6 V) |
| Power dissipation | < 750 mW (180 typ / 240 max mA) |
| Operating temperature | Industrial (−40 to 85 °C) |
| Compliance | Class 1 laser product; RoHS compliant and lead-free |
| Lifecycle | Current production |
| Variant note | G = 2 pins, short shield; T = −40 to 85 °C |
Optical and electrical values are from the Finisar / Coherent family datasheet; temperature grade is per part number. Confirm critical values with us before ordering.
About the Finisar FTLF8519F2GTL
The Finisar FTLF8519F2GTL (now a Coherent Corp. product, formerly II-VI) is a SFF 2x5 1000BASE-SX / 1G-2G FC (2.125G) optical transceiver for up to 2.125 Gb/s links at 850nm over MMF, with reach up to 550m. It is an industrial-temperature part rated −40 to 85 °C. It belongs to Finisar's FTLF8519F2 family, which has 10 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
- 2x5 SFF (MSA) footprint
- 850 nm oxide VCSEL laser transmitter
- Duplex LC connector
- Metal enclosure, for lower EMI
- Single 3.3 V power supply
- Low power dissipation
FTLF8519F2GTL: frequently asked questions
What is the Finisar FTLF8519F2GTL?
The FTLF8519F2GTL is a Finisar SFF 2x5 transceiver for 1000BASE-SX / 1G-2G FC (2.125G) at up to 2.125 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
What is the maximum distance of the FTLF8519F2GTL?
The FTLF8519F2GTL is specified for up to 550m over MMF. Long-reach optics may need an attenuator on short links; we can advise based on your link loss.
What is the optical power budget of the FTLF8519F2GTL?
Per the Finisar family datasheet, the FTLF8519F2GTL transmits −9 to −3 dBm and has a receiver sensitivity of −20 dBm @ 1.0625/1.25 Gb/s; −18 dBm @ 2.125 Gb/s. Maximum receiver input is 0 dBm.
Which fiber and connector does the FTLF8519F2GTL use?
The FTLF8519F2GTL works at 850nm over MMF. Both ends of a link must use the same optical standard.
Will the FTLF8519F2GTL work in my Cisco, Juniper, Arista or HPE switch?
The FTLF8519F2GTL follows the SFF 2x5 MSA, so it fits any matching port. It carries Finisar's own EEPROM programming; switches that check the module vendor may need a configuration setting or a vendor-branded optic. Send us your switch model and we confirm before dispatch.
FTLF8519F2GTL vs FTLF8519F2GCL: what is the difference?
Both are in Finisar's FTLF8519F2 family. They differ in temperature grade (industrial vs commercial). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FTLF8519F2GTL rated for?
The FTLF8519F2GTL is an industrial-temperature part rated −40 to 85 °C. Industrial grade suits outdoor cabinets, telecom huts and plant floors.
What does the FTLF8519F2GTL part number mean?
The FTLF prefix marks Finisar's SFP / SFP28 / SFP56 family (incl. Fibre Channel). The I letter in the suffix usually marks the industrial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTLF8519F2GTL genuine Finisar?
Yes. Next Gen Networks supplies original Finisar / Coherent modules, not third-party lookalikes or grey-market stock, and shares serial numbers on request.
What is the FTLF8519F2GTL price in India and how do I order?
The Finisar FTLF8519F2GTL price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in for a GST quote.
What power does the FTLF8519F2GTL need?
It runs from 3.3 V (3.0–3.6 V) with power dissipation of < 750 mW (180 typ / 240 max mA).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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