- Home
- Optical Transceivers
- Finisar (Coherent)
- 100M–1G
- FWLF1523P1C51
Actual product photos
available on request
To keep listings accurate, we share real photos of the exact FWLF1523P1C51 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 FWLF1523P1C51 OSC 125/155Mb/s SFP 1511nm 80km
155 Mb/s OSC 125/155Mb/s (Fast Ethernet / OC-3 optical supervisory channel) SFP transceiver, 1511nm (CWDM ch51), up to 80km, commercial (0 to 70 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FWLF1523P1C51
- Family
- FWLF1523P1x51
- Category
- Fiber optic transceiver modules
- Datasheet
- FWLF1523P1C51 datasheet (PDF)
FWLF1523P1C51 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FWLF1523P1C51 |
| Product family | FWLF1523P1x51 |
| Form factor | SFP |
| Standards / application | SONET OC-3 LR-2 / STM L-1.2; Fast Ethernet (optical supervisory channel) |
| Data rate | 125/155 Mb/s |
| Wavelength | 1511 nm (1504.5–1517.5 nm) |
| Laser | 1511 nm uncooled DFB |
| Reach | 80 km on 9/125 µm SMF @ OC-3 |
| Connector | Duplex LC |
| Tx output power | +1 to +5 dBm (C); −1 to +3 dBm (N) |
| Rx sensitivity | −34 dBm |
| Rx overload / max input | −10 dBm |
| Extinction ratio | 10 dB |
| Supply voltage | 3.3 V (3.135–3.465 V) |
| Power dissipation | <1 W typical; 1.0 W max |
| Operating temperature | Commercial (0 to 70 °C) |
| Diagnostics | Built-in digital diagnostic functions via 2-wire serial interface |
| Compliance | Class 1 laser product; RoHS compliant and lead-free (2002/95/EC) |
| Lifecycle | Current production |
| Variant note | Commercial temperature 0 to 70 °C |
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 FWLF1523P1C51
The Finisar FWLF1523P1C51 (now a Coherent Corp. product, formerly II-VI) is a SFP OSC 125/155Mb/s (Fast Ethernet / OC-3 optical supervisory channel) optical transceiver for 155 Mb/s links at 1511nm (CWDM ch51) over SMF, with reach up to 80km. It is a commercial-temperature part rated 0 to 70 °C. It belongs to Finisar's FWLF1523P1x51 family, which has 2 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: Fast/Gigabit Ethernet, SONET/SDH OC-3/OC-12, campus and access links, and legacy network upgrades.
- 125/155Mbps Optical Supervisory Channel
- 1511nm uncooled DFB laser
- Built-in digital diagnostic functions
- Duplex LC connector
- Hot-pluggable SFP
FWLF1523P1C51: frequently asked questions
What is the Finisar FWLF1523P1C51?
The FWLF1523P1C51 is a Finisar SFP transceiver for OSC 125/155Mb/s (Fast Ethernet / OC-3 optical supervisory channel) at 155 Mb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for Fast/Gigabit Ethernet, SONET/SDH OC-3/OC-12, campus and access links, and legacy network upgrades.
What is the maximum distance of the FWLF1523P1C51?
The FWLF1523P1C51 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 FWLF1523P1C51?
Per the Finisar family datasheet, the FWLF1523P1C51 transmits +1 to +5 dBm (C); −1 to +3 dBm (N) and has a receiver sensitivity of −34 dBm. Maximum receiver input is −10 dBm.
Does the FWLF1523P1C51 support DDM / digital diagnostics?
Yes. Built-in digital diagnostic functions via 2-wire serial interface. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FWLF1523P1C51 use?
The FWLF1523P1C51 works at 1511nm (CWDM ch51) 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 FWLF1523P1C51 work in my Cisco, Juniper, Arista or HPE switch?
The FWLF1523P1C51 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.
FWLF1523P1C51 vs FWLF1523P1N51: what is the difference?
Both are in Finisar's FWLF1523P1x51 family. They differ in temperature grade (commercial vs extended). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FWLF1523P1C51 rated for?
The FWLF1523P1C51 is a commercial-temperature part rated 0 to 70 °C. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FWLF1523P1C51 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 FWLF1523P1C51 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 FWLF1523P1C51 price in India and how do I order?
The Finisar FWLF1523P1C51 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 FWLF1523P1C51 need?
It runs from 3.3 V (3.135–3.465 V) with power dissipation of <1 W typical; 1.0 W max.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
Related Finisar parts
FWLF1523P1N51OSC 125/155Mb/s, 80kmFTLF1318P3BTL1000BASE-LX / 1GFC, 10kmFTLF1518P1BTL1000BASE-ZX / 1GFC, 80-90kmFTLF1217P2BTL100BASE-FX / OC-3 MM / ESCON, 2kmFTLF1323P1BTROC-3 SR-1/IR-1, STM S-1.1, 15kmFTLF1323P1BTLOC-3 LR-1, STM L-1.1, 40kmGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
Talk to Sales