NVIDIA/Mellanox SFP28-25G-BX Compatible 25G SFP28 U Transceiver Module 20km 1270nm-TX/1330nm-RX
This NVIDIA/Mellanox SFP28-25G-BX compatible transceiver provides 25G connectivity in a hot-swappable SFP28 package. Its optical design operates at 1270nm-TX/1330nm-RX for up to 20km, using Simplex LC. Complete parameters and related OEM references help procurement teams match an equipment parts list to a clearly defined optical product.
OEM Part Number: SFP28-25G-BXHT Part Number: SFP-25G23-BX20
Product Highlights
- Compatible alternative to NVIDIA/Mellanox SFP28-25G-BX
- 25G connectivity at 25.78Gbps
- Optical wavelength: 1270nm-TX/1330nm-RX
- Specified reach: 20km
- Simplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Mellanox Compatible | SFP28-25G-BX |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP-25G23-BX20 |
| Form Factor | SFP28 |
| Max Data Rate | 25.78Gbps |
| Wavelength | 1270nm-TX/1330nm-RX |
| Max Cable Distance | 20km |
| Connector | Simplex LC |
| Media | SMF |
| Transmitter Type | DFB BiDi |
| Receiver Type | PIN |
| TX Power | 0~6dBm |
| Receiver Sensitivity | <-14dBm |
| Power Budget | 14dB |
| Receiver Overload | 2.5dB |
| Power Consumption | ≤1.2W |
| Extinction Ratio | 3.5dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| CDR | TX and RX |
| Protocols | eCPRI, SFF-8472, SFF-8432, SFF-8431 |
Applications and Optical Link Design
This BiDi interface is useful where only one fiber strand is available between two sites or racks. It must be paired with the complementary wavelength direction: one end transmits on the wavelength that the other end receives. Verify the paired part number, connector polish and fiber plant before installation, and measure link loss against the specified optical budget.
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.
BiDi operation saves a fiber strand but makes wavelength orientation critical. Record the part installed at each end and check its paired receive wavelength. The 20km rating still depends on total channel loss, including connectors and splices.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is 0~6dBm; receiver sensitivity is <-14dBm; the stated optical power budget is 14dB. 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 25.78Gbps, wavelength 1270nm-TX/1330nm-RX, rated reach 20km.
NVIDIA/Mellanox Compatibility and Factory Testing
The module is checked for host recognition as SFP28-25G-BX, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Ordering Information
Quote HT part number SFP-25G23-BX20 together with OEM reference SFP28-25G-BX 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.
Quality Assurance and Packaging
Each SFP28-25G-BX 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 SFP28-25G-BX, not an original NVIDIA/Mellanox-branded module.
Which fiber and connector are required?
Use Simplex LC with SMF. The specified maximum reach is 20km, 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.