Arista Networks QSFP-40G-XSR4 Compatible 40G QSFP+ XSR4 Transceiver Module
This Arista Networks QSFP-40G-XSR4 compatible transceiver provides 40G connectivity in a hot-swappable QSFP+ package. Its optical design operates at 850nm for up to 400m on OM4, using MTP/MPO-12 Male. Complete parameters and related OEM references help project teams keep OEM references, delivery records and port schedules aligned.
OEM Part Number: QSFP-40G-XSR4HT Part Number: QSFP-CSR4-40G
Product Highlights
- Compatible alternative to Arista Networks QSFP-40G-XSR4
- 40G connectivity at 42Gbps (4x 10.5Gbps)
- Optical wavelength: 850nm
- Specified reach: 400m on OM4
- MTP/MPO-12 Male / MMF 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-XSR4 |
|---|---|
| Manufacturer | HT |
| HT Part Number | QSFP-CSR4-40G |
| Form Factor | QSFP+ |
| Max. Data Rate | 42Gbps (4x 10.5Gbps) |
| Wavelength | 850nm |
| Max. Transmission Distance | 400m@OM4 |
| Connector | MTP/MPO-12 Male |
| Media | MMF |
| Transimitter Type | VCSEL 850nm |
| Receiver Type | PIN |
| TX Power | -7.5~0dBm |
| Receiver Sensitivity | <-9.9dBm |
| Power Budget | 2.4dB |
| Receiver Overload | 2.4dBm |
| Max. Power Consumption | ≤1.5W |
| Extinction Ratio | >3dB |
| Host FEC | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Protocols | 40G Ethernet, SATA/SAS3, IEEE 802.3ba, MSA Compliant |
Project Documentation and Traceability
Large deployments are easier to audit when the order code, optical standard and endpoint record agree. Keep the OEM reference in the compatibility document and the HT part number on the packing list. Labels and carton groups can be arranged by rack or port plan so installers need not identify modules by appearance. For this model, the principal parameters are data rate 42Gbps (4x 10.5Gbps), wavelength 850nm, rated reach 400m on OM4.
Arista Networks Compatibility and Factory Testing
Compatibility testing for QSFP-40G-XSR4 combines identification with a live link and available transmit, receive and alarm information. Connector condition is inspected separately. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
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 MTP/MPO-12 Male 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.
For this multimode module, confirm fiber grade, modal bandwidth and total loss before commissioning. The 400m on OM4 figure applies only under suitable cabling conditions. Inspect every MTP/MPO-12 Male mating point and match the remote optical standard.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -7.5~0dBm; receiver sensitivity is <-9.9dBm; the stated optical power budget is 2.4dB. 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. 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.
Frequently Asked Questions
Is this an original Arista Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QSFP-40G-XSR4, not an original Arista Networks-branded module.
Which fiber and connector are required?
Use MTP/MPO-12 Male with MMF. The specified maximum reach is 400m on OM4, 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
When ordering, specify QSFP-40G-XSR4, QSFP-CSR4-40G, quantity and intended host platform. Project labels can repeat these details for receiving and asset records. 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-XSR4 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.
