10/100BASE-T SFPArista Networks QSFP-40G-UNIV Compatible 40G QSFP+ UNIV Transceiver Module
The QSFP-40G-UNIV compatible module serves equipment requiring a 40G QSFP+ interface with 1310nm optics and a 150m on OM3 / 2km on SMF rating. Connection is through Duplex LC. Product data, application guidance and factory verification are presented together to support high-density deployments balance optical performance, port access and thermal planning.
OEM Part Number: QSFP-40G-UNIVHT Part Number: QSFP-LX4-40G
Product Highlights
- Compatible alternative to Arista Networks QSFP-40G-UNIV
- 40G connectivity at 41.2Gbps (4x 10.3Gbps)
- Optical wavelength: 1310nm
- Specified reach: 150m on OM3 / 2km on SMF
- Duplex LC / MMF/SMF interface
- Operating temperature: 0 to 70°C (32 to 158°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| Arista Networks Compatible | QSFP-40G-UNIV |
|---|---|
| Manufacturer | HT |
| HT Part Number | QSFP-LX4-40G |
| Form Factor | QSFP+ |
| Max. Data Rate | 41.2Gbps (4x 10.3Gbps) |
| Wavelength | 1310nm |
| Max. Transmission Distance | 150m@OM3/2km@SMF |
| Connector | Duplex LC |
| Cable Type | MMF/SMF |
| Transimitter Type | CWDM4 DFB |
| Receiver Type | PIN |
| TX Power | -5~3.5dBm |
| Receiver Sensitivity (OMA) | <-10.5dBm |
| Receiver Overload | 3.5dB |
| Power Budget | 5.5 dB |
| Max. Power Consumption | ≤3.5W |
| Extinction Ratio | >3.5dB |
| Transmit and Dispersion Penalty (MMF) | 4.7dB |
| Transmit and Dispersion Penalty (SMF) | 2.6dB |
| Packaging Technology | BOX Packaging |
| Host FEC | Supported |
| EMC (Electro Magnetic Compatibility) | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Modulation Format | NRZ |
| Protocols | 40G Ethernet, MSA Compliant |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Application | 40G Ethernet over MMF and SMF, Data Center |
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 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 150m on OM3 / 2km on SMF reach. Keep the Duplex LC end faces clean and avoid tight bends. Different multimode standards are not interchangeable merely because they share a connector.
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.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -5~3.5dBm; the stated optical power budget is 5.5 dB. Digital diagnostics make later maintenance easier when baseline values are captured at installation. Save the initial readings with the port and OEM reference, then investigate meaningful changes rather than reacting to a single transient value. Diagnostic support depends on the host as well as the module, so unavailable fields should be confirmed with the platform documentation. 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.
High-Density Port and Thermal Planning
In a densely populated chassis, connector access and airflow form part of the optical-link design. Confirm that neighboring modules and patch leads leave room for latch operation, and include listed power consumption in the host thermal budget. Assess port density together with fiber management. For this model, the principal parameters are data rate 41.2Gbps (4x 10.3Gbps), wavelength 1310nm, rated reach 150m on OM3 / 2km on SMF.
Ordering Information
Use QSFP-40G-UNIV as the compatibility cross-reference and QSFP-LX4-40G 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.
Arista Networks Compatibility and Factory Testing
The module is checked for host recognition as QSFP-40G-UNIV, 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 Arista Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QSFP-40G-UNIV, not an original Arista Networks-branded module.
Which fiber and connector are required?
Use Duplex LC with MMF/SMF. The specified maximum reach is 150m on OM3 / 2km on SMF, 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.
