Actual product photos
available on request
To keep listings accurate, we share real photos of the exact FTL4C1QL3L stock you will receive, including the label, serial number and packaging.
Request photos from our teamPhotos are usually shared within working hours on WhatsApp or email.
Finisar FTL4C1QL3L 40GBASE-LR4 QSFP+ 2km
40 Gb/s 40GBASE-LR4 (Lite) QSFP+ transceiver, CWDM 1271-1331nm, up to 2km.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTL4C1QL3L
- Family
- FTL4C1
- Category
- Fiber optic transceiver modules
- Datasheet
- FTL4C1QL3L datasheet (PDF)
FTL4C1QL3L specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTL4C1QL3L |
| Product family | FTL4C1 |
| Form factor | QSFP+ |
| Standards / application | QSFP+ MSA; IEEE 802.3ba 40GBASE-LR4; XLPPI (QM variants also OTU3/OTU3e1/OTU3e2) |
| Data rate | 41.2 Gb/s aggregate; 10.3 Gb/s per lane (QM: 39.8–44.6 Gb/s multirate) |
| Wavelength | 1264.5–1277.5 / 1284.5–1297.5 / 1304.5–1317.5 / 1324.5–1337.5 nm |
| Laser | Uncooled 4x10Gb/s CWDM transmitter (DFB) |
| Receiver | 4 photodetectors (PIN), 10.3 Gb/s each |
| Reach | 10 km SMF (QL 'Lite' variants: 2 km SMF) |
| Connector | Duplex LC |
| Tx output power | −7.0 to 2.3 dBm avg per lane |
| Rx sensitivity | −11.5 dBm OMA per lane (stressed −9.6 dBm, QE3C) |
| Rx overload / max input | Damage threshold 3.4 dBm per lane |
| Extinction ratio | 3.5 dB min |
| Supply voltage | 3.3 V (3.1–3.47 V) |
| Power dissipation | < 3.5 W (QW2N: < 2.8 W) |
| Operating temperature | 0 to 70 °C case (C suffix); 15 to 60 °C (L 'Lite' suffix); −10 to 78 °C (QW2N) |
| Diagnostics | Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C per QSFP+ MSA) |
| Compliance | RoHS-6 |
| Lifecycle | Ask for availability |
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 FTL4C1QL3L
The Finisar FTL4C1QL3L (now a Coherent Corp. product, formerly II-VI) is a QSFP+ 40GBASE-LR4 (Lite) optical transceiver for 40 Gb/s links at CWDM 1271-1331nm over SMF duplex (LC), with reach up to 2km. It belongs to Finisar's FTL4C1 family, which has 13 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: 40G Ethernet aggregation, spine links and 4 × 10G breakout.
- Hot-pluggable QSFP+ form factor
- Uncooled 4x10Gb/s CWDM transmitter
- XLPPI electrical interface
- I2C interface per QSFP+ MSA
- Built-in digital diagnostic functions
- RoHS-6 compliant
FTL4C1QL3L: frequently asked questions
What is the Finisar FTL4C1QL3L?
The FTL4C1QL3L is a Finisar QSFP+ transceiver for 40GBASE-LR4 (Lite) at 40 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for 40G Ethernet aggregation, spine links and 4 × 10G breakout.
What is the maximum distance of the FTL4C1QL3L?
The FTL4C1QL3L is specified for up to 2km over SMF duplex (LC). 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 FTL4C1QL3L?
Per the Finisar family datasheet, the FTL4C1QL3L transmits −7.0 to 2.3 dBm avg per lane and has a receiver sensitivity of −11.5 dBm OMA per lane (stressed −9.6 dBm, QE3C). Maximum receiver input is Damage threshold 3.4 dBm per lane.
Does the FTL4C1QL3L support DDM / digital diagnostics?
Yes. Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C per QSFP+ MSA). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTL4C1QL3L use?
The FTL4C1QL3L works at CWDM 1271-1331nm over SMF duplex (LC). CWDM/DWDM optics must match the channel of your mux/demux port. Both ends of a link must use the same optical standard.
Will the FTL4C1QL3L work in my Cisco, Juniper, Arista or HPE switch?
The FTL4C1QL3L follows the QSFP+ 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.
FTL4C1QL3L vs FTL4C1QL1L: what is the difference?
Both are in Finisar's FTL4C1 family. They differ in build / application (40GBASE-LR4 (Lite) vs 40GBASE-LR4 Lite Gen2). Pick the variant that matches your temperature, latch and wavelength needs.
What does the FTL4C1QL3L part number mean?
The FTL4 prefix marks Finisar's 40G QSFP+ family. The remaining characters identify the optical design and build variant.
Is your FTL4C1QL3L 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 FTL4C1QL3L price in India and how do I order?
The Finisar FTL4C1QL3L 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 FTL4C1QL3L need?
It runs from 3.3 V (3.1–3.47 V) with power dissipation of < 3.5 W (QW2N: < 2.8 W).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
Related Finisar parts
FTL4C1QL1L40GBASE-LR4 Lite Gen2, 2kmFTL4C1QL2L40GBASE-LR4 Lite Gen2, 2kmFTL4C1QL2C40GBASE-LR4 Lite, 2kmFTL4C1QL3C40G LR4 Lite, 2kmFTL4C1QE1C40GBASE-LR4 Gen2, 10kmFTL4C1QE1L40GBASE-LR4, 10kmGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
Talk to Sales