Arista Networks QSFP-40G-SRBD Compatible 40G QSFP+ SR Transceiver Module

Product Highlights

• Compatible alternative to Arista Networks QSFP-40G-SRBD
• 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

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.

Arista Networks Compatibility and Factory Testing

Factory verification starts with the expected QSFP-40G-SRBD 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.

Interoperability and Host Configuration

Check three layers before deployment: host acceptance of the module identity, port support for the stated rate, and a matching optical standard at the remote interface. For breakout operation, confirm lane configuration too. Similar-looking cages can behave differently across speeds and firmware settings. 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

Use QSFP-40G-SRBD as the compatibility cross-reference and QSFP-BIDI-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.

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

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.

Frequently Asked Questions