Arista QSFP-BX40-100G Compatible 100G QSFP28 BX40-U Transceiver Module 40km on OS2 1304.58nm-TX/1309.14nm-RX
Built for hosts recognizing QSFP-BX40-100G, this HT-manufactured QSFP28 module delivers 100G transmission at 1304.58nm-TX/1309.14nm-RX. Its rated reach is 40km on OS2, with Simplex LC/UPC as the physical interface. The specifications and engineering guidance below support field technicians install, maintain and identify the exact compatible module, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: QSFP-BX40-100GHT Part Number: QSFP-BX40-100G
Product Highlights
- Compatible alternative to Arista QSFP-BX40-100G
- 100G connectivity at 106.25Gbps
- Optical wavelength: 1304.58nm-TX/1309.14nm-RX
- Specified reach: 40km on OS2
- Simplex LC/UPC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| HT Part Number | QSFP-BX40-100G |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP28 |
| Max. Data Rate | 106.25Gbps |
| Wavelength | 1304.58nm-TX/1309.14nm-RX |
| Max. Cable Distance | 40km@OS2 |
| Connector | Simplex LC/UPC |
| Media | SMF |
| Transmitter Type | MZM EML |
| Receiver Type | APD |
| TX Power | 1.7~7.1dBm |
| Minimum Receiver Power | -16dBm |
| Power Budget | 17.7dB |
| Receiver Overload | -3dBm |
| Max. Power Consumption | 4.5W |
| Extinction Ratio | > 5.0dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 4x 25G-NRZ |
| Modulation (Optical) | 1x 100G-PAM4 |
| Inbuilt FEC | KP4 |
| Bit Error Ratio (BER) | 2E-4 |
| Protocols | QSFP28 MSA, IEEE 802.3bs, 100G Lambda MSA |
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 106.25Gbps, wavelength 1304.58nm-TX/1309.14nm-RX, rated reach 40km on OS2.
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 100G interface configuration must match the remote equipment; sharing a QSFP28 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 40km on OS2 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 1.7~7.1dBm; the stated optical power budget is 17.7dB. 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.
Arista Compatibility and Factory Testing
Factory verification starts with the expected QSFP-BX40-100G 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.
Frequently Asked Questions
Is this an original Arista transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QSFP-BX40-100G, not an original Arista-branded module.
Which fiber and connector are required?
Use Simplex LC/UPC with SMF. The specified maximum reach is 40km on OS2, 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
Use QSFP-BX40-100G as the compatibility cross-reference and QSFP-BX40-100G as the HT ordering identity. Keep other reaches or wavelength directions on separate order lines. 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.
