10/100BASE-T SFPArista Networks SFP-25GESR-85 Compatible 25G SFP28 ESR Transceiver Module
The SFP-25GESR-85 compatible module serves equipment requiring a 25G SFP28 interface with 850nm optics and a 300m on OM3 / 400m on OM4 rating. Connection is through Duplex LC/UPC. Product data, application guidance and factory verification are presented together to support structured fiber installations preserve a documented and serviceable optical channel.
OEM Part Number: SFP-25GESR-85HT Part Number: SFP-25GESR-85
Product Highlights
- Compatible alternative to Arista Networks 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.
Arista Networks Compatibility and Factory Testing
Compatibility testing for SFP-25GESR-85 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.
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. 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.
Structured Fiber Pathways and Serviceability
Treat the transceiver as part of the complete channel. Follow the intended patch-panel route, maintain bend control and leave service access around the port. Confirm connector polish and fiber type at every mated pair; a documented service allowance is preferable to excess slack concealed inside a rack. For this model, the principal parameters are data rate 25Gbps, wavelength 850nm, rated reach 300m on OM3 / 400m on OM4.
Ordering Information
Quote HT part number SFP-25GESR-85 together with OEM reference SFP-25GESR-85 and quantity. Add the host model and software release when pre-order verification is required. Neutral labels, customer packaging and project-specific compatibility review are available on request.
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.
Quality Assurance and Packaging
Before packing, the module receives interface inspection, identification and link checks. Protective packaging avoids pressure on the connector and latch. Customer references, rack groups and project packing lists can be added for volume orders.
Frequently Asked Questions
Is this an original Arista Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-25GESR-85, not an original Arista Networks-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.
