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Finisar FTL4E1QE1C 40GBASE-ER4 QSFP+ 40km
40 Gb/s 40GBASE-ER4 (APD) QSFP+ transceiver, CWDM 1271-1331nm, up to 40km, commercial temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTL4E1QE1C
- Family
- FTL4E1
- Category
- Fiber optic transceiver modules
- Datasheet
- FTL4E1QE1C datasheet (PDF)
FTL4E1QE1C specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTL4E1QE1C |
| Product family | FTL4E1 |
| Form factor | QSFP+ |
| Standards / application | QSFP+ MSA; IEEE 802.3bm 40GBASE-ER4; XLPPI (QM1C also OTU3/OTU3e1/OTU3e2, ITU-T G.695) |
| Data rate | 41.3 Gb/s aggregate; 10.3125 Gb/s per lane (QM1C: 39.8–44.6 Gb/s) |
| 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 (APD per EPS) |
| Reach | 40 km SMF |
| Connector | Duplex LC |
| Tx output power | −2.7 to 4.5 dBm avg per lane |
| Rx sensitivity | −19 dBm OMA per lane (stressed −16.8 dBm, QM1C) |
| Rx overload / max input | Damage threshold 3.8 dBm per lane; max input −4.0 dBm per lane (QM1C) |
| Extinction ratio | 5.5 dB |
| Supply voltage | 3.3 V (3.1–3.47 V) |
| Power dissipation | < 3.5 W |
| Operating temperature | Commercial |
| Diagnostics | Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C, 400 kHz max) |
| Compliance | RoHS-6 |
| Lifecycle | Current production |
| Variant note | 40GBASE-ER4, 40 km, commercial temp |
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 FTL4E1QE1C
The Finisar FTL4E1QE1C (now a Coherent Corp. product, formerly II-VI) is a QSFP+ 40GBASE-ER4 (APD) optical transceiver for 40 Gb/s links at CWDM 1271-1331nm over SMF duplex (LC), with reach up to 40km. It is a commercial-temperature part. It belongs to Finisar's FTL4E1 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
- 18.5 dB link insertion loss budget
- XLPPI electrical interface
- Built-in digital diagnostic functions
- Single 3.3V power supply
FTL4E1QE1C: frequently asked questions
What is the Finisar FTL4E1QE1C?
The FTL4E1QE1C is a Finisar QSFP+ transceiver for 40GBASE-ER4 (APD) 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 FTL4E1QE1C?
The FTL4E1QE1C is specified for up to 40km 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 FTL4E1QE1C?
Per the Finisar family datasheet, the FTL4E1QE1C transmits −2.7 to 4.5 dBm avg per lane and has a receiver sensitivity of −19 dBm OMA per lane (stressed −16.8 dBm, QM1C). Maximum receiver input is Damage threshold 3.8 dBm per lane; max input −4.0 dBm per lane (QM1C).
Does the FTL4E1QE1C support DDM / digital diagnostics?
Yes. Built-in digital diagnostics incl. Tx/Rx power monitoring (I2C, 400 kHz max). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTL4E1QE1C use?
The FTL4E1QE1C 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 FTL4E1QE1C work in my Cisco, Juniper, Arista or HPE switch?
The FTL4E1QE1C 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.
FTL4E1QE1C vs FTL4E1QM1C: what is the difference?
Both are in Finisar's FTL4E1 family. They differ in build / application (40GBASE-ER4 (APD) vs 40GBASE-ER4 + OTU3 multirate (APD)). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FTL4E1QE1C rated for?
The FTL4E1QE1C is a commercial-temperature part. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FTL4E1QE1C part number mean?
The FTL4 prefix marks Finisar's 40G QSFP+ family. The C letter in the suffix usually marks the commercial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTL4E1QE1C 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 FTL4E1QE1C price in India and how do I order?
The Finisar FTL4E1QE1C 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 FTL4E1QE1C 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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