10/100BASE-T SFPFortinet FN-TRAN-SFP56-SR Compatible 50G SFP56 SR Transceiver Module
Built for hosts recognizing FN-TRAN-SFP56-SR, this HT-manufactured SFP56 module delivers 50G transmission at 850nm. Its rated reach is 100m on OM4, with Duplex LC as the physical interface. The specifications and engineering guidance below support high-density deployments balance optical performance, port access and thermal planning, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: FN-TRAN-SFP56-SRHT Part Number: SFP-50GSR-85
Product Highlights
- Compatible alternative to Fortinet FN-TRAN-SFP56-SR
- 50G connectivity at 53.125Gbps
- Optical wavelength: 850nm
- Specified reach: 100m on OM4
- Duplex LC / MMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| HT Part Number | SFP-50GSR-85 |
|---|---|
| Manufacturer | HT |
| Form Factor | SFP56 |
| Max Data Rate | 53.125Gbps |
| Wavelength | 850nm |
| Max Cable Distance | 100m@OM4 |
| Connector | Duplex LC |
| Media | MMF |
| Transmitter Type | VCSEL |
| Receiver Type | PIN |
| TX Power | -6.5~4dBm |
| Receiver Sensitivity | <-8.4dBm |
| Power Budget | 1.9dB |
| Receiver Overload | 4dBm |
| Power Consumption | ≤1.5W |
| Extinction Ratio | ＞3dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| CDR (Clock and Data Recovery) | TX & RX Built-in CDR |
| Modulation Format | PAM4 |
| Protocols | IEEE802.3cd, SFF-8472, SFF-8402, SFF-8419, OIF-CEI-04.0 |
Applications and Optical Link Design
Typical deployments include switch-to-switch, switch-to-server and aggregation links inside a data hall or between adjacent equipment rooms. The Duplex LC interface connects to the specified multimode cabling, and the stated reach depends on fiber grade and link loss. Keep this interface on the matching multimode optical standard rather than connecting it directly to a single-mode wavelength or reach variant.
Before deployment, check the host port type, supported data rate and firmware requirements. The 50G interface configuration must match the remote equipment; sharing a SFP56 housing alone does not make two transceiver types interoperable.
For this multimode module, confirm fiber grade, modal bandwidth and total loss before commissioning. The 100m on OM4 figure applies only under suitable cabling conditions. Inspect every Duplex LC mating point and match the remote optical standard.
Quality Assurance and Packaging
Each FN-TRAN-SFP56-SR compatible module is inspected, powered up and functionally checked before protective packing. Dust caps and individual trays shield the interface during transport. Customer references, rack groups and project packing lists can be added for volume orders.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -6.5~4dBm; receiver sensitivity is <-8.4dBm; the stated optical power budget is 1.9dB. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
High-Density Port and Thermal Planning
In a densely populated chassis, connector access and airflow form part of the optical-link design. Confirm that neighboring modules and patch leads leave room for latch operation, and include listed power consumption in the host thermal budget. Assess port density together with fiber management. For this model, the principal parameters are data rate 53.125Gbps, wavelength 850nm, rated reach 100m on OM4.
Ordering Information
Use FN-TRAN-SFP56-SR as the compatibility cross-reference and SFP-50GSR-85 as the HT ordering identity. Keep other reaches or wavelength directions on separate order lines. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Fortinet Compatibility and Factory Testing
Compatibility testing for FN-TRAN-SFP56-SR combines identification with a live link and available transmit, receive and alarm information. Connector condition is inspected separately. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Frequently Asked Questions
Is this an original Fortinet transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies FN-TRAN-SFP56-SR, not an original Fortinet-branded module.
Which fiber and connector are required?
Use Duplex LC with MMF. The specified maximum reach is 100m on OM4, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
