Finisar FTLF8538P5BCZ Compatible 25GBASE-SR SFP28 Transceiver
Finisar compatible FTLF8538P5BCz - 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 FTLF8538P5BCz Price
In Stock - Ships Next Business DayFinisar compatible FTLF8538P5BCz 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 FTLF8538P5BCz Datasheet
v3Complete technical specifications and product details
Finisar compatible FTLF8538P5BCz Description
EdgeOptic's FTLF8538P5BCZ compatible is a Finisar-coded 25GBASE-SR SFP28 transceiver that matches the original Finisar (now Coherent Corp) FTLF8538P5BCZ part number. The 8538 prefix places this module in the single-rate 25G line of the Finisar P-series - it runs at 25.78125 Gbps and does not negotiate a 10G fallback. Buyers crossing from an FTLF8536 dual-rate deployment should note the distinction: the 8538 requires the host port to be configured for 25G natively.
Optical specs follow the FTLF8538P5 spec line: 850 nm VCSEL transmitter, PIN photodiode receiver, TX power -8.4 to +2.4 dBm, RX sensitivity better than -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. The module is IEEE 802.3by Clause 112 compliant and runs RS-FEC via Clause 91 (RS(528,514)) when the host port negotiates it.
Electrical interface is SFP28 per SFF-8402 MSA with SFF-8431 / SFF-8432 for the cage, and digital diagnostics follow SFF-8472 Rev 12.2 - per-module temperature, supply voltage, TX bias, TX power, and RX power are all exposed to the host. Power dissipation is 0.3 W, the module is hot-swappable, operating temperature range is 0-70 C, and the part is RoHS compliant per the original Finisar specification.
The BCZ suffix is a Finisar customer-coded EEPROM variant. Base and P5 generation are shared with the FTLF8538P5BCL; the BCZ differs only in the customer-specific EEPROM strings written at manufacturing. When the target host enforces strict module-identity validation, the vendor string and module-ID bytes must match what the switch firmware expects - the BCZ was ordered with a particular customer in mind, and a generic BCL will sometimes fail validation in a slot spec'd for BCZ. EdgeOptic's compatible is EEPROM-coded to present FTLF8538P5BCZ-equivalent identity, removing that failure mode at link bring-up.
For populations where the host firmware rejects a generic FTLF8538P5BCL and specifically requires BCZ EEPROM identity, contact our sales team.
Frequently Asked Questions
Is the FTLF8538P5BCZ a single-rate 25G module, or does it support 10G like the FTLF8536 series?
The FTLF8538 series is single-rate 25G only. The 8538 prefix is the Finisar line designation for 25GBASE-SR parts without 10G fallback, in contrast to the FTLF8536 prefix which covers dual-rate 10G/25G parts. The FTLF8538P5BCZ runs at 25.78125 Gbps per IEEE 802.3by and will not negotiate down to 10GBASE-SR - the host port must be configured for 25G natively.
Is the FTLF8538P5BCZ the same module as the FTLF8538P5BCL with a different suffix?
At the optical and electrical level the two are the same 25GBASE-SR SFP28 module - 850 nm VCSEL, 100 m OM4, 5.3 dB budget, SFP28 per SFF-8402. What differs is the EEPROM: the Z suffix is a customer-coded variant of the base FTLF8538P5BCL. In practice the two swap transparently when the host does not enforce module-identity validation. If the host firmware is strict, a BCZ-coded module is required.
What does the Z suffix mean on the FTLF8538P5BCZ, and does it target a specific OEM?
The Z suffix is a Finisar customer-variant code. Finisar used single-letter suffixes to designate customer-coded EEPROM builds (comparable to how Q and L designate other variants). Public Finisar documentation does not name the specific OEM tied to the Z variant, so EdgeOptic does not attribute it to a vendor we cannot verify. The EdgeOptic compatible is programmed to the BCZ identity reported by the target host - if the host enforces specific EEPROM bytes, the module is coded to match during fulfillment.