Dell Q28-40/100G-SM4 Compatible 100G QSFP28 SM4 Transceiver Module

Product Highlights

• Compatible alternative to Dell Q28-40/100G-SM4
• 100G connectivity at Dual Rate 40 Gbps and 100 Gbps
• Optical wavelength: 850/880/910/940nm
• Specified reach: 100G: 75m on OM3 / 100m on OM4 / 150m on OM540G: 240m on OM3 / 350m on OM4 / 440m on OM5
• Duplex LC / 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 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 100G interface configuration must match the remote equipment; sharing a QSFP28 housing alone does not make two transceiver types interoperable.

For this multimode module, confirm fiber grade, modal bandwidth and total loss before commissioning. The 100G: 75m on OM3 / 100m on OM4 / 150m on OM540G: 240m on OM3 / 350m on OM4 / 440m on OM5 figure applies only under suitable cabling conditions. Inspect every Duplex LC mating point and match the remote optical standard.

Quality Assurance and Packaging

Before packing, the module receives interface inspection, identification and link checks. Protective packaging avoids pressure on the connector and latch. 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 100G: -7.5~2 dBm 40G: -7.5~3 dBm; the stated optical power budget is 100G: 1.9dB40G: 2dB. 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.

Data-Center Optical Design and Airflow

Select the module by optical standard, reach and rack layout. Check the complete fiber channel, including panels and connectors, and keep dense bundles from blocking front-panel airflow. Account for listed power consumption and preserve enough space to remove a module without disturbing adjacent links. For this model, the principal parameters are data rate Dual Rate 40 Gbps and 100 Gbps, wavelength 850/880/910/940nm, rated reach 100G: 75m on OM3 / 100m on OM4 / 150m on OM540G: 240m on OM3 / 350m on OM4 / 440m on OM5.

Ordering Information

Use Q28-40/100G-SM4 as the compatibility cross-reference and QSFP-MBIDI-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.

Dell Compatibility and Factory Testing

Compatibility testing for Q28-40/100G-SM4 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.

Frequently Asked Questions

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.