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Finisar FTLF8556E1BCL 50GBASE-SR PAM4 SFP56 850nm 100m
50 Gb/s 50GBASE-SR PAM4 (50GbE only, bail) SFP56 transceiver, 850nm, up to 100m (OM4), commercial temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLF8556E1BCL
- Family
- FTLF8556
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLF8556E1BCL datasheet (PDF)
FTLF8556E1BCL specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLF8556E1BCL |
| Product family | FTLF8556 |
| Form factor | SFP56 |
| Standards / application | IEEE 802.3cd; IEEE 802.3bs; SFF-8431; SFF-8432; SFF-8472 |
| Data rate | 50GBASE-SR (26.5625 GBd PAM4); 25GBASE-SR 25.78 Gb/s; 10GBASE-SR 10.3125 Gb/s |
| Wavelength | 840–860 nm |
| Laser | 850 nm VCSEL |
| Receiver | PIN |
| Reach | 100 m OM4 (50G/25G); 400 m (10G) |
| Connector | Duplex LC |
| Tx output power | −6.5 to +4 dBm avg (50G); OMA −4.5 to +3 dBm |
| Rx sensitivity | −6.5 dBm OMA (50G) |
| Rx overload / max input | +4 dBm |
| Extinction ratio | ≥ 3 dB (TDECQ ≤ 4.5 dB) |
| Supply voltage | 3.3 V (3.14–3.46 V) |
| Power dissipation | < 1.5 W (478 mA) |
| Operating temperature | Commercial |
| Diagnostics | SFF-8472 digital diagnostics, 2-wire |
| Compliance | RoHS; Class 1 laser per IEC 60825-1 |
| Lifecycle | Current production |
| Variant note | Bail, 50GbE only |
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 FTLF8556E1BCL
The Finisar FTLF8556E1BCL (now a Coherent Corp. product, formerly II-VI) is a SFP56 50GBASE-SR PAM4 (50GbE only, bail) optical transceiver for 50 Gb/s links at 850nm over MMF, with reach up to 100m (OM4). It is a commercial-temperature part. It belongs to Finisar's FTLF8556 family, which has 6 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: 50G Ethernet server and edge links.
- 50GBASE-SR 100m 850nm Multi-Mode SFP56
- Hot-pluggable SFP56 footprint
- Tri-rate, dual-rate and single-rate options
- Power dissipation < 1.5W
- Limiting electrical interface receiver with internal re-timer
- Built-in digital diagnostic functions
FTLF8556E1BCL: frequently asked questions
What is the Finisar FTLF8556E1BCL?
The FTLF8556E1BCL is a Finisar SFP56 transceiver for 50GBASE-SR PAM4 (50GbE only, bail) at 50 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for 50G Ethernet server and edge links.
What is the maximum distance of the FTLF8556E1BCL?
The FTLF8556E1BCL is specified for up to 100m (OM4) over MMF. 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 FTLF8556E1BCL?
Per the Finisar family datasheet, the FTLF8556E1BCL transmits −6.5 to +4 dBm avg (50G); OMA −4.5 to +3 dBm and has a receiver sensitivity of −6.5 dBm OMA (50G). Maximum receiver input is +4 dBm.
Does the FTLF8556E1BCL support DDM / digital diagnostics?
Yes. SFF-8472 digital diagnostics, 2-wire. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FTLF8556E1BCL use?
The FTLF8556E1BCL works at 850nm over MMF. Both ends of a link must use the same optical standard.
Will the FTLF8556E1BCL work in my Cisco, Juniper, Arista or HPE switch?
The FTLF8556E1BCL follows the SFP56 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.
FTLF8556E1BCL vs FTLF8556D1BCV: what is the difference?
Both are in Finisar's FTLF8556 family. They differ in build / application (50GBASE-SR PAM4 (50GbE only, bail) vs 50GBASE-SR PAM4 (50/25GbE, bail)). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FTLF8556E1BCL rated for?
The FTLF8556E1BCL is a commercial-temperature part. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FTLF8556E1BCL part number mean?
The FTLF prefix marks Finisar's SFP / SFP28 / SFP56 family (incl. Fibre Channel). The C letter in the suffix usually marks the commercial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTLF8556E1BCL 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 FTLF8556E1BCL price in India and how do I order?
The Finisar FTLF8556E1BCL 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 FTLF8556E1BCL need?
It runs from 3.3 V (3.14–3.46 V) with power dissipation of < 1.5 W (478 mA).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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