10/100BASE-T SFPCisco QSFP-40G-SR-BD Compatible 40G QSFP+ SR Transceiver Module
Built for hosts recognizing QSFP-40G-SR-BD, this HT-manufactured QSFP+ module delivers 40G transmission at 850/880/910/940nm. Its rated reach is 300m on OM3 / 400m on OM4 / 500m on OM5, with Duplex LC/UPC as the physical interface. The specifications and engineering guidance below support structured fiber installations preserve a documented and serviceable optical channel, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: QSFP-40G-SR-BDHT Part Number: QSFP-BIDI-40G
Product Highlights
- Compatible alternative to Cisco QSFP-40G-SR-BD
- 40G connectivity at 41.2Gbps (4x 10.3125Gbps)
- Optical wavelength: 850/880/910/940nm
- Specified reach: 300m on OM3 / 400m on OM4 / 500m on OM5
- Duplex LC/UPC / MMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | QSFP-40G-SR-BD |
|---|---|
| Manufacturer | HT |
| HT Part Number | QSFP-BIDI-40G |
| Form Factor | QSFP+ |
| Max. Data Rate | 41.2Gbps (4x 10.3125Gbps) |
| Wavelength | 850/880/910/940nm |
| Max. Transmission Distance | 300m@OM3/400m@OM4/500m@OM5 |
| Connector | Duplex LC/UPC |
| Cable Type | MMF |
| Transmitter Type | VCSEL |
| Receiver Type | PIN |
| TX Power | -7.5~3dBm |
| Receiver Sensitivity | <-9.1dBm |
| Power Budget | 1.6dB |
| Receiver Overload | 3.0dBm |
| Max. Power Consumption | ≤3.5W |
| Extinction Ratio | >2.0dB |
| DDM/DOM | Supported |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| CDR (Clock and Data Recovery) | TX & RX Built-in CDR |
| Packaging Technology | COB (Chip on Board) Packaging |
| Modulation Format | 4x10G-NRZ |
| Bit Error Ratio (BER) | 1E-12 |
| MTBF | 10,500,000 Hours |
| EMC (Electro Magnetic Compatibility) | Supported |
| Protocols | QSFP+ MSA, IEEE 802.3ba XLPPI electrical interface Compliant |
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 40G interface configuration must match the remote equipment; sharing a QSFP+ housing alone does not make two transceiver types interoperable.
The multimode channel should use the fiber grade associated with the stated 300m on OM3 / 400m on OM4 / 500m on OM5 reach. Keep the Duplex LC/UPC end faces clean and avoid tight bends. Different multimode standards are not interchangeable merely because they share a connector.
Cisco Compatibility and Factory Testing
Factory verification starts with the expected QSFP-40G-SR-BD 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.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -7.5~3dBm; receiver sensitivity is <-9.1dBm; the stated optical power budget is 1.6dB. 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.
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 41.2Gbps (4x 10.3125Gbps), wavelength 850/880/910/940nm, rated reach 300m on OM3 / 400m on OM4 / 500m on OM5.
Ordering Information
Quote HT part number QSFP-BIDI-40G together with OEM reference QSFP-40G-SR-BD 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
Each QSFP-40G-SR-BD 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 Cisco transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QSFP-40G-SR-BD, not an original Cisco-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 / 500m on OM5, 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.
