Finisar FTLF8538P5BCL Compatible 25GBASE-SR SFP28 Transceiver
Finisar compatible FTLF8538P5BCL - Key Features
- Compatibility: Finisar
- Media Type: Multi-Mode Fiber (MMF) -OM3/OM4/OM5
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 100 m
- Average Link Budget: 5.3 dB
- Tx Wavelength: 850 nm
- Supported Data Rate: 8.5 Gbps - 25.78 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Finisar FTLF8538P5BCL Price
In Stock - Ships Next Business DayFinisar compatible FTLF8538P5BCL Specifications
Form Factor | SFP28 |
Media Type | Multi-Mode Fiber (MMF) -OM3/OM4/OM5 |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 100 m |
Average Link Budget | 5.3 dB |
TX Wavelength | 850 nm |
RX Wavelength | 850 nm |
Supported Data Rate | 8.5 Gbps - 25.78 Gbps |
Supported Ethernet Applications | 10G Ethernet (10.31Gbps), 25G Ethernet (25.78Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | VSCEL Laser |
Average Launch Power (Min) Each Lane | -5 dBm |
Average Launch Power (Max) Each Lane | 2.4 dBm |
Extinction Ratio (Min) | 3 dB |
Receiver Type | PIN photodiode |
Rx Wavelength Bandwidth | 20 nm |
Average Receiver Sensitivity (Min) Each Lane | -10.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 2.4 dBm |
Receiver Overload | 2.4 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 0.3 W |
Power | +3.3V single power supply |
Compliance | SFF-8432, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, RoHS, SFF-8431, SFF-8472, SFP28 MSA |
Finisar compatible FTLF8538P5BCL Datasheet
v3Complete technical specifications and product details
Finisar compatible FTLF8538P5BCL Description
EdgeOptic's FTLF8538P5BCL compatible is a Finisar-coded 25GBASE-SR SFP28 version of the EdgeOptic 25G-SFP28-100 multi-vendor 25GBASE-SR SFP28 transceiver. The OEM Finisar (now Coherent Corp) FTLF8538P5BCL is documented as a single-rate 25G-only design, without the 10GBASE-SR fallback mode that the FTLF8536 series provides. The EdgeOptic compatible inherits the dual-rate 10G + 25G envelope from the 25G-SFP28-100 platform, so it covers the FTLF8538P5BCL replacement use case at 25G and adds 10GBASE-SR support on hosts that drive the same SFP28 cage at 10G.
Optical specs follow the family root: 850 nm VCSEL transmitter, PIN photodiode receiver, TX power −5 to +2.4 dBm, RX sensitivity −10.3 dBm, 5.3 dB link budget. Reach is 100 m on OM4, 100 m on OM5, and 70 m on OM3 over an LC/UPC duplex connector. RS-FEC per IEEE 802.3by Clause 108 (RS(528,514)) applies when the host port enables it; verify FEC configuration against the specific switch platform documentation. Line rate spans 10.31 to 25.78 Gbps on the EdgeOptic compatible, covering both 10GBASE-SR and 25GBASE-SR host rates.
Electrical interface is SFP28 per SFF-8402 MSA, with SFF-8431 and SFF-8432 governing the cage and management interface. Digital diagnostics are SFF-8472 compliant: the host reads per-module temperature, supply voltage, TX bias, TX power, and RX power through standard SFF-8472 register access. Transceiver telemetry is exposed via the host switch management surface; specific CLI paths vary by platform. Power dissipation is 0.3 W maximum on this commercial-temperature (0 to 70°C) build, drawing less than the preceding FTLF8538P4BCL OEM part. The module is hot-swappable and RoHS compliant per the original Finisar specification.
The FTLF8538P5BCL is specified into 25G-only switch populations where the dual-rate FTLF8536 family is not required by the host spec. A -IT suffix variant (FTLF8538P5BCL-IT) appears in third-party ordering documents; Finisar/Coherent does not publish a definition of -IT for this base SKU, and third-party listings associate it with Intel OEM coding at commercial temperature rather than an industrial-temperature build. EdgeOptic's compatible is coded to Finisar-recognized EEPROM for drop-in replacement in Finisar-populated slots; for the -IT variant, confirm EEPROM identity with the original equipment vendor before ordering.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For BOMs that specifically call out FTLF8538P5BCL-IT or any suffix variant against the base SKU, or for confirmation of EEPROM identity ahead of a Finisar-to-EdgeOptic migration, contact our sales team.
Frequently Asked Questions
Does the OEM FTLF8538P5BCL support 10GBASE-SR fallback, or is it 25G-only?
The OEM Finisar FTLF8538P5BCL is single-rate 25G only, without the 10GBASE-SR fallback mode that some SFP28 modules provide. The EdgeOptic compatible inherits the dual-rate 10G + 25G envelope from the 25G-SFP28-100 platform, so it covers the FTLF8538P5BCL replacement use case at 25G and adds 10GBASE-SR support for mixed-speed infrastructure where the host port may run at 10G. This page targets FTLF8538P5BCL replacement specifically.
Is the FTLF8538P5BCL interchangeable with the FTLF8536P5BCL at 25G?
At 25GBASE-SR the two parts are optically and electrically equivalent: same 850 nm VCSEL, same 100 m OM4 and 70 m OM3 reach, same 5.3 dB link budget, same SFP28 cage. The difference is rate-mode behaviour. The FTLF8536P5BCL is a Finisar dual-rate part that adds 10GBASE-SR support on hosts that configure the port for 10G; the FTLF8538P5BCL is 25G-only on the OEM datasheet. If the slot is 25G-only, either part closes the link; if the slot is dual-rate or 10G and the BOM specifies the 8538 series, the EdgeOptic compatible's dual-rate envelope covers 10G on this part as well, while the OEM 8538 does not.
What does the -IT suffix mean on FTLF8538P5BCL-IT, and is it an industrial-temperature variant?
The -IT suffix is not defined in public Finisar or Coherent documentation. Third-party listings associate it with Intel OEM coding at commercial temperature rather than an industrial-temperature build, a pattern consistent with other Intel-coded Hisense variants. Intel's own extended-temperature 25G SFP28 part is E25GSFP28SRX, a separate ordering code. If a BOM specifies FTLF8538P5BCL-IT, verify EEPROM coding and the intended temperature grade with the original equipment vendor and contact our sales team for a coded-to-spec build if needed.