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Finisar FTL4C3QE1C 40GE LM4 universal QSFP+ 1km SMF
40 Gb/s 40GE LM4 universal SMF/MMF Gen2 QSFP+ transceiver, CWDM 1271-1331nm, up to 1km SMF.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTL4C3QE1C
- Family
- FTL4C3
- Category
- Fiber optic transceiver modules
- Datasheet
- FTL4C3QE1C datasheet (PDF)
FTL4C3QE1C specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTL4C3QE1C |
| Product family | FTL4C3 |
| Form factor | QSFP+ |
| Standards / application | QSFP+ MSA; IEEE 802.3ba 40GBASE-LR4 (LM4); XLPPI |
| Data rate | 41.2 Gb/s aggregate; 10.3125 Gb/s per lane |
| Wavelength | 1264.5–1277.5 / 1284.5–1297.5 / 1304.5–1317.5 / 1324.5–1337.5 nm |
| Laser | Uncooled 4x10Gb/s CWDM transmitter |
| Receiver | 4 photodetectors, 10.3 Gb/s each |
| Reach | 140 m OM3 / 160 m OM4 / 1 km SMF |
| Connector | Duplex LC |
| Tx output power | −7.0 to 4.3 dBm avg per lane (MMF); −10.0 to 2.3 dBm (SMF) |
| Rx sensitivity | −10.5 dBm OMA per lane (MMF and SMF) |
| Rx overload / max input | Damage threshold 5.5 dBm per lane |
| Extinction ratio | 3.5 dB min |
| Supply voltage | 3.3 V (3.1–3.47 V) |
| Power dissipation | < 3.5 W |
| Operating temperature | 0 to 70 °C case |
| Diagnostics | Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C) |
| Compliance | RoHS-6 |
| Lifecycle | Ask for availability |
| Variant note | C3 = 1271–1331 nm CWDM over MMF and SMF; E = 40G Ethernet; 1 = first generation; C = commercial temperature |
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 FTL4C3QE1C
The Finisar FTL4C3QE1C (now a Coherent Corp. product, formerly II-VI) is a QSFP+ 40GE LM4 universal SMF/MMF Gen2 optical transceiver for 40 Gb/s links at CWDM 1271-1331nm over SMF duplex (LC) / MMF, with reach up to 1km SMF. It belongs to Finisar's FTL4C3 family, which has 2 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
- Operates over duplex multimode and single mode fiber
- XLPPI electrical interface
- Built-in digital diagnostic functions
- RoHS-6 compliant
FTL4C3QE1C: frequently asked questions
What is the Finisar FTL4C3QE1C?
The FTL4C3QE1C is a Finisar QSFP+ transceiver for 40GE LM4 universal SMF/MMF Gen2 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 FTL4C3QE1C?
The FTL4C3QE1C is specified for up to 1km SMF over SMF duplex (LC) / 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 FTL4C3QE1C?
Per the Finisar family datasheet, the FTL4C3QE1C transmits −7.0 to 4.3 dBm avg per lane (MMF); −10.0 to 2.3 dBm (SMF) and has a receiver sensitivity of −10.5 dBm OMA per lane (MMF and SMF). Maximum receiver input is Damage threshold 5.5 dBm per lane.
Does the FTL4C3QE1C support DDM / digital diagnostics?
Yes. Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTL4C3QE1C use?
The FTL4C3QE1C works at CWDM 1271-1331nm over SMF duplex (LC) / MMF. 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 FTL4C3QE1C work in my Cisco, Juniper, Arista or HPE switch?
The FTL4C3QE1C 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.
FTL4C3QE1C vs FTL4C3QE2C: what is the difference?
Both are in Finisar's FTL4C3 family and share the same core optics; the suffix marks a different build option (latch, receiver or ordering variant). Pick the variant that matches your temperature, latch and wavelength needs.
What does the FTL4C3QE1C part number mean?
The FTL4 prefix marks Finisar's 40G QSFP+ family. The remaining characters identify the optical design and build variant.
Is your FTL4C3QE1C 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 FTL4C3QE1C price in India and how do I order?
The Finisar FTL4C3QE1C 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 FTL4C3QE1C need?
It runs from 3.3 V (3.1–3.47 V) with power dissipation of < 3.5 W.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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