FTLF1436P4PCL Finisar Compatible 25GBASE-LR SFP28 10km

EdgeOptic's FTLF1436P4PCL compatible is a Finisar-coded 25GBASE-LR SFP28 transceiver, a single-rate version of the EdgeOptic 25G-SFP28-10 multi-vendor optical platform. It carries the Finisar FTLF1436P4PCL identity in EEPROM, so the host recognizes it as the original Finisar 25G LR module and brings the port up without manual override. The module moves 25 Gigabit Ethernet over a single-mode fiber pair and reaches 10 km on standard SMF.

The Finisar FTLF1436P4PCL is documented as a single-rate 25GBASE-LR optic, fixed at the 25.78 Gbps line rate. BCL, BCV, PCL, and PCV are variant designations in the FTLF1436P4 25G LR SFP28 series, and the dual-rate 10G and 25G capability of that generation applies to the BCV and PCV variants rather than to PCL. An engineer sourcing a drop-in for an FTLF1436P4PCL port should treat it as a 25G LR module. EdgeOptic's compatible matches that 25GBASE-LR identity and is coded to register cleanly in equipment that shipped with the Finisar part.

Optically the module uses a 1310 nm DML transmitter and a PIN photodiode receiver inside the SFP28 form factor. Transmit power runs from −7 to +2 dBm and receiver sensitivity is rated at −12 dBm, with a +3 dBm overload point and an extinction ratio of at least 3.5 dB. EdgeOptic specifies a 5 dB link budget, which covers a 10 km SMF span with standard connector and splice losses. The 25GBASE-LR transmission follows IEEE 802.3cc. The optic carries no built-in forward error correction, so the host switch supplies RS(528,514) FEC when the link requires it. Verify the host RS-FEC setting against the chassis transceiver table during commissioning, and confirm both ends of the link run a matching configuration.

The module connects through a duplex LC/UPC interface and operates across the commercial range of 0 to 70 °C, drawing up to 1.2 W from a single +3.3 V supply. Digital optical monitoring reports real-time transmit power, receive power, temperature, bias current, and supply voltage, giving a network team the same diagnostic visibility as the original Finisar optic. It suits 25G access and aggregation links, data center site interconnects, and metro segments up to 10 km.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the FTLF1436P4PCL compatible is CE and RoHS certified and meets the SFP28 MSA. It ships next business day from EU stock with a lifetime warranty. For help confirming the FTLF1436P4PCL fits your switch port, contact our sales team.