NVIDIA/Mellanox SFP28-25G-BX40-I Compatible 25G SFP28 U Transceiver Module 40km 1270nm-TX/1310nm-RX
The SFP28-25G-BX40-I compatible module serves equipment requiring a 25G SFP28 interface with 1270nm-TX/1310nm-RX optics and a 40km rating. Connection is through Simplex LC. Product data, application guidance and factory verification are presented together to support field technicians install, maintain and identify the exact compatible module.
OEM Part Number: SFP28-25G-BX40-IHT Part Number: SFP-25G23-BX40-I
Product Highlights
- Compatible alternative to NVIDIA/Mellanox SFP28-25G-BX40-I
- 25G connectivity at 25.78Gbps
- Optical wavelength: 1270nm-TX/1310nm-RX
- Specified reach: 40km
- Simplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: -40 to 85°C (-40 to 185°F)
Specifications
| Mellanox Compatible | SFP28-25G-BX40-I |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP-25G23-BX40-I |
| Form Factor | SFP28 |
| Max Data Rate | 25.78Gbps |
| Wavelength | 1270nm-TX/1310nm-RX |
| Max Cable Distance | 40km |
| Connector | Simplex LC |
| Media | SMF |
| Transmitter Type | DFB BiDi |
| Receiver Type | APD |
| TX Power | 0~6dBm |
| Receiver Sensitivity | <-18dBm |
| Power Budget | 18dB |
| Receiver Overload | -6dBm |
| Power Consumption | ≤1.5W |
| Extinction Ratio | 4dB |
| DDM/DOM | Supported |
| Industrial Temperature Range | -40 to 85°C (-40 to 185°F) |
| CDR | TX & RX Built-in CDR |
| FEC Function | Not Supported |
| Protocols | SFF-8472, SFF-8402, SFF-8432, SFF-8431, CEI-28G-VSR |
Field Installation and Maintenance
Inspect the connector and patch lead before installation, then support the fiber without pulling on the module housing. Release the latch properly during maintenance and keep dust protection on unused interfaces. If a module is removed for later use, retain its part-number label and record its original port. For this model, the principal parameters are data rate 25.78Gbps, wavelength 1270nm-TX/1310nm-RX, rated reach 40km.
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.
The industrial temperature rating makes this version appropriate for controlled outdoor cabinets, transport nodes and other installations exposed to wider ambient temperature variation. Adequate airflow, protected cable routing and host-platform temperature limits still apply.
This single-fiber interface must be paired with the complementary wavelength direction. One end transmits on the wavelength the other receives. Verify connector polish and measure loss over the 40km design range before service.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is 0~6dBm; receiver sensitivity is <-18dBm; the stated optical power budget is 18dB. 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.
Quality Assurance and Packaging
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
NVIDIA/Mellanox Compatibility and Factory Testing
The module is checked for host recognition as SFP28-25G-BX40-I, 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.
Frequently Asked Questions
Is this an original NVIDIA/Mellanox transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP28-25G-BX40-I, not an original NVIDIA/Mellanox-branded module.
Which fiber and connector are required?
Use Simplex LC with SMF. The specified maximum reach is 40km, 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.
Ordering Information
Quote HT part number SFP-25G23-BX40-I together with OEM reference SFP28-25G-BX40-I 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.
