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Finisar FTLF1421S1KCL OC-48 IR-1 multirate SFF 2x10 1310nm 15km
up to 2.67 Gb/s OC-48 IR-1 multirate (2.67G) SFF 2x10 transceiver, 1310nm, up to 15km, commercial (−10 to 70 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLF1421S1KCL
- Family
- FTLF1421S1
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLF1421S1KCL datasheet (PDF)
FTLF1421S1KCL specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLF1421S1KCL |
| Product family | FTLF1421S1 |
| Form factor | SFF 2x10 |
| Standards / application | SONET OC-48 IR-1 / SDH STM S-16.1; GbE, Fibre Channel, OC-12, OC-3 |
| Data rate | 155–2667 Mb/s |
| Wavelength | 1270–1360 nm |
| Laser | Uncooled 1310 nm DFB |
| Reach | 20 km @ OC-48 |
| Connector | Duplex LC |
| Tx output power | −5 to 0 dBm |
| Rx sensitivity | −18 dBm @ OC-48 |
| Rx overload / max input | 0 dBm |
| Extinction ratio | 8.2 dB min |
| Supply voltage | 3.3 V (3.00–3.60 V) |
| Power dissipation | <700 mW typical (Icc 200 typ / 300 mA max) |
| Operating temperature | Commercial (−10 to 70 °C) |
| Diagnostics | Analog diagnostics (laser bias, laser power, received photocurrent pins) |
| Compliance | Class 1 laser (FDA/CDRH); RoHS compliant and lead-free (2002/95/EC) |
| Lifecycle | Ask for availability |
| Variant note | 2 grounding pins, long 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 FTLF1421S1KCL
The Finisar FTLF1421S1KCL (now a Coherent Corp. product, formerly II-VI) is a SFF 2x10 OC-48 IR-1 multirate (2.67G) optical transceiver for up to 2.67 Gb/s links at 1310nm over SMF, with reach up to 15km. It is a commercial-temperature part rated −10 to 70 °C. It belongs to Finisar's FTLF1421S1 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
- Uncooled 1310nm DFB laser transmitter
- Standard 2x10 pin SFF footprint (MSA compliant)
- Low power dissipation <700 mW typical
- Extended operating temperature range: -10°C to 70°C
FTLF1421S1KCL: frequently asked questions
What is the Finisar FTLF1421S1KCL?
The FTLF1421S1KCL is a Finisar SFF 2x10 transceiver for OC-48 IR-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 FTLF1421S1KCL?
The FTLF1421S1KCL is specified for up to 15km 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 FTLF1421S1KCL?
Per the Finisar family datasheet, the FTLF1421S1KCL transmits −5 to 0 dBm and has a receiver sensitivity of −18 dBm @ OC-48. Maximum receiver input is 0 dBm.
Does the FTLF1421S1KCL support DDM / digital diagnostics?
Yes. Analog diagnostics (laser bias, laser power, received photocurrent pins). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTLF1421S1KCL use?
The FTLF1421S1KCL works at 1310nm over SMF. Both ends of a link must use the same optical standard.
Will the FTLF1421S1KCL work in my Cisco, Juniper, Arista or HPE switch?
The FTLF1421S1KCL 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.
FTLF1421S1KCL vs FTLF1421S1GCL: what is the difference?
Both are in Finisar's FTLF1421S1 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 FTLF1421S1KCL rated for?
The FTLF1421S1KCL is a commercial-temperature part rated −10 to 70 °C. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FTLF1421S1KCL 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 FTLF1421S1KCL 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 FTLF1421S1KCL price in India and how do I order?
The Finisar FTLF1421S1KCL 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 FTLF1421S1KCL need?
It runs from 3.3 V (3.00–3.60 V) with power dissipation of <700 mW typical (Icc 200 typ / 300 mA max).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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