NVIDIA/Mellanox SFP-25GESR-85 Compatible 25G SFP28 ESR Transceiver Module
This NVIDIA/Mellanox SFP-25GESR-85 compatible transceiver provides 25G connectivity in a hot-swappable SFP28 package. Its optical design operates at 850nm for up to 300m on OM3 / 400m on OM4, using Duplex LC/UPC. Complete parameters and related OEM references help procurement teams match an equipment parts list to a clearly defined optical product.
OEM Part Number: SFP-25GESR-85HT Part Number: SFP-25GESR-85
Product Highlights
- Compatible alternative to NVIDIA/Mellanox SFP-25GESR-85
- 25G connectivity at 25Gbps
- Optical wavelength: 850nm
- Specified reach: 300m on OM3 / 400m on OM4
- Duplex LC/UPC / MMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| HT Part Number | SFP-25GESR-85 |
|---|---|
| Manufacturer | HT |
| Form Factor | SFP28 |
| Max. Data Rate | 25Gbps |
| Wavelength | 850nm |
| Max. Cable Distance | 300m@OM3/400m@OM4 |
| Connector | Duplex LC/UPC |
| Media | MMF |
| Transmitter Type | VCSEL |
| Receiver Type | PIN |
| TX Power | -6.4~2.4dBm |
| Minimum Receiver Power | -10.3dBm |
| Power Budget | 3.9dB |
| Receiver Overload | 2.4dBm |
| Max. Power Consumption | ≤1W |
| Extinction Ratio | 2dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| CDR (Clock and Data Recovery) | TX & RX Built-in CDR |
| Inbuilt FEC | Yes |
| Core Size | 50/125 µm |
| Packaging Technology | COB Packaging |
| Protocols | SFP28 MSA, SFF-8472, SFF-8024, SFF-8431, SFF-8432 |
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/UPC 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 25G interface configuration must match the remote equipment; sharing a SFP28 housing alone does not make two transceiver types interoperable.
For this multimode module, confirm fiber grade, modal bandwidth and total loss before commissioning. The 300m on OM3 / 400m on OM4 figure applies only under suitable cabling conditions. Inspect every Duplex LC/UPC mating point and match the remote optical standard.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -6.4~2.4dBm; the stated optical power budget is 3.9dB. A sound acceptance record includes link state, diagnostic temperature, supply voltage and transmit or receive levels where the host exposes them. Compare the readings with the stated ranges rather than treating any received light as proof of adequate margin. Persistent alarms or borderline values should trigger an end-face and complete-channel inspection. 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.
Procurement and Asset Identification
A useful purchase order identifies the host platform, expected OEM code and optical standard separately. This prevents a module with the same housing but another wavelength, reach or identification profile from being substituted. For mixed deployments, keep one order line per OEM reference and reconcile each received unit with its intended port. For this model, the principal parameters are data rate 25Gbps, wavelength 850nm, rated reach 300m on OM3 / 400m on OM4.
NVIDIA/Mellanox Compatibility and Factory Testing
Factory verification starts with the expected SFP-25GESR-85 identity and finishes with an operating host link. EEPROM data, diagnostic visibility and the stated optical parameters are assessed together. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Ordering Information
When ordering, specify SFP-25GESR-85, SFP-25GESR-85, quantity and intended host platform. Project labels can repeat these details for receiving and asset records. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Quality Assurance and Packaging
Each SFP-25GESR-85 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.
Frequently Asked Questions
Is this an original NVIDIA/Mellanox transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-25GESR-85, not an original NVIDIA/Mellanox-branded module.
Which fiber and connector are required?
Use Duplex LC/UPC with MMF. The specified maximum reach is 300m on OM3 / 400m 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.