- Home
- Optical Transceivers
- Finisar (Coherent)
- 10G
- FTLX3971DTC40
Actual product photos
available on request
To keep listings accurate, we share real photos of the exact FTLX3971DTC40 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 FTLX3971DTC40 DWDM fixed 1.2-11.3G SFP+ 1545.32nm 40km
10 Gb/s class DWDM fixed 1.2-11.3G multirate (EML/APD) SFP+ transceiver, 1545.32nm (ITU C40), up to 40km, industrial temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLX3971DTC40
- Family
- FTLX3971DTC
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLX3971DTC40 datasheet (PDF)
FTLX3971DTC40 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLX3971DTC40 |
| Product family | FTLX3971DTC |
| Form factor | SFP+ |
| Standards / application | DWDM fixed 1.2-11.3G multirate (EML/APD) |
| Data rate | 1.2288–11.3176 Gb/s |
| Wavelength | DWDM C-band, 100 GHz, C20–C60 |
| Laser | Cooled 1550 nm EML |
| Reach | 40 km over G.652 SMF |
| Connector | Duplex LC |
| Tx output power | +1 to +4 dBm (sign of min as extracted) |
| Rx sensitivity | −24.0 dBm (0 ps/nm); −22.0 dBm (800 ps/nm) |
| Rx overload / max input | −10 dBm (<9.83 Gb/s); −7 dBm (≥9.83 Gb/s) |
| Extinction ratio | 8.2 dB |
| Supply voltage | 3.3 V (3.14–3.46 V) |
| Power dissipation | 1.6 W max |
| Operating temperature | Industrial |
| Diagnostics | Digital diagnostics via 2-wire serial interface |
| Lifecycle | Current production |
| Variant note | ITU 100 GHz channel C40 |
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 FTLX3971DTC40
The Finisar FTLX3971DTC40 (now a Coherent Corp. product, formerly II-VI) is a SFP+ DWDM fixed 1.2-11.3G multirate (EML/APD) optical transceiver for 10 Gb/s class links at 1545.32nm (ITU C40) over Duplex SMF LC, with reach up to 40km. It is an industrial-temperature part. It belongs to Finisar's FTLX3971DTC family, which has 41 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: 10G Ethernet, 10G Fibre Channel, SONET OC-192 / OTN and DWDM metro / DCI links.
- 100 GHz spacing, DWDM C-band
- Up to 40km link length
- 1.2 through 11.3 Gb/s data rates
- Cooled 1550nm EML laser
- -40/85°C case temperature range
FTLX3971DTC40: frequently asked questions
What is the Finisar FTLX3971DTC40?
The FTLX3971DTC40 is a Finisar SFP+ transceiver for DWDM fixed 1.2-11.3G multirate (EML/APD) at 10 Gb/s class. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for 10G Ethernet, 10G Fibre Channel, SONET OC-192 / OTN and DWDM metro / DCI links.
What is the maximum distance of the FTLX3971DTC40?
The FTLX3971DTC40 is specified for up to 40km over Duplex SMF 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 FTLX3971DTC40?
Per the Finisar family datasheet, the FTLX3971DTC40 transmits +1 to +4 dBm (sign of min as extracted) and has a receiver sensitivity of −24.0 dBm (0 ps/nm); −22.0 dBm (800 ps/nm). Maximum receiver input is −10 dBm (<9.83 Gb/s); −7 dBm (≥9.83 Gb/s).
Does the FTLX3971DTC40 support DDM / digital diagnostics?
Yes. Digital diagnostics via 2-wire serial interface. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTLX3971DTC40 use?
The FTLX3971DTC40 works at 1545.32nm (ITU C40) over Duplex SMF 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 FTLX3971DTC40 work in my Cisco, Juniper, Arista or HPE switch?
The FTLX3971DTC40 follows the SFP+ 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.
FTLX3971DTC40 vs FTLX3971DTC20: what is the difference?
Both are in Finisar's FTLX3971DTC family. They differ in wavelength (1545.32nm (ITU C40) vs 1561.42nm (ITU C20)). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FTLX3971DTC40 rated for?
The FTLX3971DTC40 is an industrial-temperature part. Industrial grade suits outdoor cabinets, telecom huts and plant floors.
What does the FTLX3971DTC40 part number mean?
The FTLX prefix marks Finisar's 10G family (SFP+, XFP, X2, XENPAK). The I letter in the suffix usually marks the industrial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTLX3971DTC40 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 FTLX3971DTC40 price in India and how do I order?
The Finisar FTLX3971DTC40 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 FTLX3971DTC40 need?
It runs from 3.3 V (3.14–3.46 V) with power dissipation of 1.6 W max.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
Related Finisar parts
FTLX3971DTC20DWDM fixed 1.2-11.3G multirate, 40kmFTLX3971DTC21DWDM fixed 1.2-11.3G multirate, 40kmFTLX3971DTC22DWDM fixed 1.2-11.3G multirate, 40kmFTLX3971DTC23DWDM fixed 1.2-11.3G multirate, 40kmFTLX3971DTC24DWDM fixed 1.2-11.3G multirate, 40kmFTLX3971DTC25DWDM fixed 1.2-11.3G multirate, 40kmGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
Talk to Sales