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Finisar FTLF1721S1GCL OC-48 LR-1 multirate SFF 2x10 40km
up to 2.67 Gb/s OC-48 LR-1 multirate (2.67G) SFF 2x10 transceiver, 1310nm DFB + APD, up to 40km, commercial (−10 to 70 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLF1721S1GCL
- Family
- FTLF1721S1
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLF1721S1GCL datasheet (PDF)
FTLF1721S1GCL specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLF1721S1GCL |
| Product family | FTLF1721S1 |
| Form factor | SFF 2x10 |
| Standards / application | SONET OC-48 LR-1 / SDH STM L-16.1; OC-12 LR-1, OC-3 LR-1; Gigabit Ethernet; 1x/2x Fibre Channel |
| Data rate | 155–2667 Mb/s |
| Wavelength | 1280–1335 nm |
| Laser | Uncooled 1310 nm DFB |
| Receiver | APD |
| Reach | 45 km @ OC-48 (9/125 µm SMF) |
| Connector | Duplex LC |
| Tx output power | −2 to +3 dBm |
| Rx sensitivity | −28 dBm @ OC-48 |
| Extinction ratio | 8.2 dB min |
| Supply voltage | 3.3 V (3.00–3.60 V) |
| Power dissipation | <900 mW typical (Icc 270 typ / 340 mA max) |
| Operating temperature | Commercial (−10 to 70 °C) |
| Diagnostics | Analog diagnostics (laser bias, laser power, received power monitors) |
| Compliance | Class 1 laser; TÃœV/CSA; RoHS compliant |
| Lifecycle | Ask for availability |
| Variant note | 2 grounding pins, short EMI shield |
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 FTLF1721S1GCL
The Finisar FTLF1721S1GCL (now a Coherent Corp. product, formerly II-VI) is a SFF 2x10 OC-48 LR-1 multirate (2.67G) optical transceiver for up to 2.67 Gb/s links at 1310nm DFB + APD over SMF, with reach up to 40km. It is a commercial-temperature part rated −10 to 70 °C. It belongs to Finisar's FTLF1721S1 family, which has 4 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
- Up to 2.67Gb/s bi-directional data links
- Standard 2x10 pin SFF footprint (MSA compliant)
- Uncooled 1310nm DFB laser transmitter
- APD Receiver
- Metal enclosure, for lower EMI
- Low power dissipation <900mW typical
FTLF1721S1GCL: frequently asked questions
What is the Finisar FTLF1721S1GCL?
The FTLF1721S1GCL is a Finisar SFF 2x10 transceiver for OC-48 LR-1 multirate (2.67G) at up to 2.67 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
What is the maximum distance of the FTLF1721S1GCL?
The FTLF1721S1GCL is specified for up to 40km over SMF. 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 FTLF1721S1GCL?
Per the Finisar family datasheet, the FTLF1721S1GCL transmits −2 to +3 dBm and has a receiver sensitivity of −28 dBm @ OC-48.
Does the FTLF1721S1GCL support DDM / digital diagnostics?
Yes. Analog diagnostics (laser bias, laser power, received power monitors). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTLF1721S1GCL use?
The FTLF1721S1GCL works at 1310nm DFB + APD over SMF. Both ends of a link must use the same optical standard.
Will the FTLF1721S1GCL work in my Cisco, Juniper, Arista or HPE switch?
The FTLF1721S1GCL follows the SFF 2x10 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.
FTLF1721S1GCL vs FTLF1721S1HCL: what is the difference?
Both are in Finisar's FTLF1721S1 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 temperature range is the FTLF1721S1GCL rated for?
The FTLF1721S1GCL is a commercial-temperature part rated −10 to 70 °C. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FTLF1721S1GCL part number mean?
The FTLF prefix marks Finisar's SFP / SFP28 / SFP56 family (incl. Fibre Channel). The C letter in the suffix usually marks the commercial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTLF1721S1GCL 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 FTLF1721S1GCL price in India and how do I order?
The Finisar FTLF1721S1GCL 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 FTLF1721S1GCL need?
It runs from 3.3 V (3.00–3.60 V) with power dissipation of <900 mW typical (Icc 270 typ / 340 mA max).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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