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Finisar FTL4S1QE1C 40GE SWDM4 QSFP+ 240m
40 Gb/s 40GE SWDM4 QSFP+ transceiver, SWDM 850-940nm, up to 240m.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTL4S1QE1C
- Family
- FTL4S1
- Category
- Fiber optic transceiver modules
- Datasheet
- FTL4S1QE1C datasheet (PDF)
FTL4S1QE1C specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTL4S1QE1C |
| Product family | FTL4S1 |
| Form factor | QSFP+ |
| Standards / application | QSFP+ MSA; IEEE 802.3ba XLPPI electrical interface |
| Data rate | 41.2 Gb/s aggregate; 10.3125 Gb/s per lane |
| Wavelength | 850, 880, 910, 940 nm (SWDM4) |
| Laser | Uncooled 4x10Gb/s SWDM transmitter (VCSEL) |
| Receiver | 4 photodetectors (PIN), 10.3 Gb/s each |
| Reach | QE1C: 240 m OM3 / 350 m OM4 / 440 m OM5; QE2C: 300 m OM3 / 400 m OM4 (duplex MMF) |
| Connector | Duplex LC |
| Tx output power | QE1C: −7.6 to 3.0 dBm avg per lane; QE2C: −7.5 to 3.0 dBm |
| Rx sensitivity | −9.1 dBm OMA per lane |
| Rx overload / max input | QE1C: damage threshold 4 dBm per lane; QE2C: max avg receive power 3.0 dBm per lane |
| Extinction ratio | QE1C: 3.0 dB min; QE2C: 2.0 dB min |
| Supply voltage | 3.3 V (3.1–3.47 V) |
| Power dissipation | QE1C: < 2.5 W; QE2C: < 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 | First generation, 240 m OM3 / 350 m OM4 / 440 m OM5, < 2.5 W |
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 FTL4S1QE1C
The Finisar FTL4S1QE1C (now a Coherent Corp. product, formerly II-VI) is a QSFP+ 40GE SWDM4 optical transceiver for 40 Gb/s links at SWDM 850-940nm over MMF duplex (LC), with reach up to 240m. It belongs to Finisar's FTL4S1 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
- Uncooled 4x10Gb/s SWDM transmitter
- Built-in SWDM mux/demux
- 40G over duplex MMF without changing fiber plant
- Built-in digital diagnostic functions
- RoHS-6 compliant
FTL4S1QE1C: frequently asked questions
What is the Finisar FTL4S1QE1C?
The FTL4S1QE1C is a Finisar QSFP+ transceiver for 40GE SWDM4 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 FTL4S1QE1C?
The FTL4S1QE1C is specified for up to 240m over MMF 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 FTL4S1QE1C?
Per the Finisar family datasheet, the FTL4S1QE1C transmits QE1C: −7.6 to 3.0 dBm avg per lane; QE2C: −7.5 to 3.0 dBm and has a receiver sensitivity of −9.1 dBm OMA per lane. Maximum receiver input is QE1C: damage threshold 4 dBm per lane; QE2C: max avg receive power 3.0 dBm per lane.
Does the FTL4S1QE1C 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 FTL4S1QE1C use?
The FTL4S1QE1C works at SWDM 850-940nm over MMF duplex (LC). Both ends of a link must use the same optical standard.
Will the FTL4S1QE1C work in my Cisco, Juniper, Arista or HPE switch?
The FTL4S1QE1C 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.
FTL4S1QE1C vs FTL4S1QE2C: what is the difference?
Both are in Finisar's FTL4S1 family. They differ in reach (240m vs 300m (OM4)); build / application (40GE SWDM4 vs 40GE SWDM4 Gen2). Pick the variant that matches your temperature, latch and wavelength needs.
What does the FTL4S1QE1C part number mean?
The FTL4 prefix marks Finisar's 40G QSFP+ family. The remaining characters identify the optical design and build variant.
Is your FTL4S1QE1C 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 FTL4S1QE1C price in India and how do I order?
The Finisar FTL4S1QE1C 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 FTL4S1QE1C need?
It runs from 3.3 V (3.1–3.47 V) with power dissipation of QE1C: < 2.5 W; QE2C: < 3.5 W.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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