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Finisar FWLF1625P2L53 CWDM 4.25G FC, APD rx SFP CWDM 1531nm 80km
up to 4.25 Gb/s CWDM 4.25G FC, APD rx SFP transceiver, CWDM 1531nm, up to 80km, commercial (−5 to 75 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FWLF1625P2L53
- Family
- FWLF1625P2L
- Category
- Fiber optic transceiver modules
- Datasheet
- FWLF1625P2L53 datasheet (PDF)
FWLF1625P2L53 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FWLF1625P2L53 |
| Product family | FWLF1625P2L |
| Form factor | SFP |
| Standards / application | Gigabit Ethernet and 1x/2x/4x Fibre Channel |
| Data rate | 1.0625–4.25 Gb/s |
| Wavelength | 1471/1491/1511/1531/1551/1571/1591/1611 nm (8 CWDM channels) |
| Laser | CWDM DFB |
| Reach | Up to 80 km on SMF @4.25 Gb/s, BER 10⁻¹² |
| Connector | Duplex LC |
| Tx output power | +1 to +5 dBm |
| Rx sensitivity | 5.6 µW (OMA) @4.25 Gb/s |
| Rx overload / max input | −8 dBm |
| Extinction ratio | 4.5 dB |
| Supply voltage | 3.3 V (3.135–3.465 V) |
| Power dissipation | Supply current 350 mA max |
| Operating temperature | Commercial (−5 to 75 °C) |
| Diagnostics | Built-in digital diagnostics, I²C at A0h/A2h |
| Compliance | RoHS; Class 1 laser product (FDA/CDRH, EN/IEC 60825) |
| Lifecycle | Current production |
| Variant note | L = Non rate selectable, 1x/2x/4x FC; Wavelength 1531 nm (clasp color: green) |
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 FWLF1625P2L53
The Finisar FWLF1625P2L53 (now a Coherent Corp. product, formerly II-VI) is a SFP CWDM 4.25G FC, APD rx optical transceiver for up to 4.25 Gb/s links at CWDM 1531nm over SMF, with reach up to 80km. It is a commercial-temperature part rated −5 to 75 °C. It belongs to Finisar's FWLF1625P2L family, which has 8 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 4.25 Gb/s bi-directional data links
- Up to 80 km on SMF at 4.25 Gb/s
- Hot-pluggable SFP footprint
- Built-in digital diagnostic functions
- RoHS compliant
- Single 3.3V power supply
FWLF1625P2L53: frequently asked questions
What is the Finisar FWLF1625P2L53?
The FWLF1625P2L53 is a Finisar SFP transceiver for CWDM 4.25G FC, APD rx at up to 4.25 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 FWLF1625P2L53?
The FWLF1625P2L53 is specified for up to 80km 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 FWLF1625P2L53?
Per the Finisar family datasheet, the FWLF1625P2L53 transmits +1 to +5 dBm and has a receiver sensitivity of 5.6 µW (OMA) @4.25 Gb/s. Maximum receiver input is −8 dBm.
Does the FWLF1625P2L53 support DDM / digital diagnostics?
Yes. Built-in digital diagnostics, I²C at A0h/A2h. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FWLF1625P2L53 use?
The FWLF1625P2L53 works at CWDM 1531nm over SMF. 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 FWLF1625P2L53 work in my Cisco, Juniper, Arista or HPE switch?
The FWLF1625P2L53 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.
FWLF1625P2L53 vs FWLF1625P2L47: what is the difference?
Both are in Finisar's FWLF1625P2L family. They differ in wavelength (CWDM 1531nm vs CWDM 1471nm). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FWLF1625P2L53 rated for?
The FWLF1625P2L53 is a commercial-temperature part rated −5 to 75 °C. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FWLF1625P2L53 part number mean?
The FWLF prefix marks Finisar's CWDM / DWDM wavelength-specific SFP 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 FWLF1625P2L53 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 FWLF1625P2L53 price in India and how do I order?
The Finisar FWLF1625P2L53 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 FWLF1625P2L53 need?
It runs from 3.3 V (3.135–3.465 V) with power dissipation of Supply current 350 mA max.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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