Cisco QSFP to SFP/SFP+ Adapter (QSA) Module

Upgrade flexibility and maximize port density with the Cisco QSFP to SFP/SFP+ Adapter (QSA) Module. This breakout solution converts a single QSFP+ port into four independent SFP/SFP+ interfaces, enabling teams to migrate or scale 40G uplinks to multiple 10G connections without replacing switches or cabling. Designed for Cisco ecosystems, the QSA module delivers reliable interoperability, consistent performance, and streamlined cabling management in data centers, enterprise networks, and campus deployments. Whether you’re building a scalable spine-leaf architecture, expanding access layer capacity, or optimizing maintenance windows, this QSA module helps you achieve higher port utilization, lower total cost of ownership, and smoother transition paths to 10G or 25G uplinks while preserving your existing Cisco investments.

• Seamless 40G to 4x10G breakout — The Cisco QSFP to SFP/SFP+ Adapter (QSA) Module enables a single QSFP+ port to be divided into four independent SFP/SFP+ channels. This breakout capability unlocks flexible uplink configurations, allowing you to distribute bandwidth across multiple 10G links, aggregate them with standard Ethernet technologies, and optimize cabling within crowded data center cabinets. By consolidating four 10G links from a single 40G port, you can achieve greater port density, simplified topology, and more efficient use of existing transceivers and cables. The result is a scalable path from 40G to multiple 10G connections without replacing your core switching hardware, preserving your investment while extending network reach.
• Plug-and-play installation with optimized reliability — The QSA module is engineered for straightforward deployment in compatible Cisco switches. With plug-and-play design and vendor-tested interoperability, you can insert the module into a supported QSFP slot and begin configuring each breakout interface. It supports streamlined operations in multi-vendor environments and minimizes downtime during upgrades. The unit is built to withstand demanding data-center conditions, delivering stable performance over extended service lifetimes while reducing cabling complexity and maintenance overhead.
• Compatibility and interoperability within Cisco ecosystems — Specifically engineered for Cisco devices that support QSA breakout modules, this adapter ensures robust interoperability across Cisco switches and routers that recognize QSA functionality. By aligning with Cisco standards for QSFP breakout configurations, the module helps maintain a consistent management and monitoring experience, enabling centralized provisioning, policy enforcement, and unified diagnostics across all four breakout links. This compatibility is a key advantage for enterprises seeking to preserve Cisco-centric architectures while expanding their 10G footprint.
• Quality construction and thermal efficiency — The breakout module features a compact, rugged form factor with attention to EMI shielding and thermal performance in high-density racks. Its design emphasizes reliable insertion/removal cycles, precise alignment of connectors, and durable materials that tolerate the rigors of data-center environments. Efficient power usage and effective thermal management help minimize heat-related concerns in dense topologies, supporting stable operation in 24/7 networks and reducing cooling load in rack deployments.
• Flexible cabling options for diverse deployments — The QSA breakout supports a variety of SFP/SFP+ transceivers and connection types, enabling both fiber-based and copper-based 10G links depending on adjacency and distance requirements. This versatility lets you choose the most cost-effective cabling solution for each of the four breakout paths, whether you’re linking to nearby aggregation switches with DAC cables or extending reach with optical transceivers. The result is a flexible, future-ready design that adapts as network needs evolve and allows phased upgrades without wholesale cabling changes.

Technical Details of Cisco QSFP to SFP/SFP+ Adapter (QSA) Module

• Technical details are not provided in the current listing. For precise specifications, environmental ratings, and UPC/SKU-based data, please consult Cisco’s official documentation or the retailer’s specifications page using the relevant product identifiers.

how to install Cisco QSFP to SFP/SFP+ Adapter (QSA) Module

• Before installation, verify that your Cisco switch supports QSA breakout modules and review vendor guidelines for compatible platforms and slot requirements. If your platform supports hot-swapping, you may install the module with the system powered on; otherwise, follow the device’s maintenance procedure to power down prior to insertion to minimize risk.
• Identify the QSFP port intended for breakout and remove any protective covers or dust caps from the QSFP slot to ensure a clean insertion path. Inspect the area for clearance and airflow to prevent impedance or overheating after installation.
• Insert the QSA module firmly into the QSFP port until it seats securely. Ensure the module is aligned correctly and that there is no excessive force. A proper seating is essential for reliable electrical contact and stable link negotiation across all breakout lanes.
• Install four SFP/SFP+ transceivers into the breakout paths and connect the corresponding cables (fiber or copper) to the downstream devices. If using fiber, verify the correct wavelength/rate and pair with appropriate LC/SC or other compatible connectors. If using copper DAC, ensure the DAC cables match the SFP+ specifications and supported lengths.
• Power on (if required by your platform) and verify the breakout links using your switch’s management interface or CLI. Confirm that all four 10G links are up, configure any link aggregation (if used) or routing policies, and monitor for interface errors. Document the topology and ensure that monitoring tools reflect the new breakout configuration for ongoing performance visibility.

Frequently asked questions

• What is a QSA module?

  A QSA (QSFP to SFP/SFP+ Adapter) module is a breakout device that converts a single 40G QSFP+ port into four independent 10G SFP/SFP+ interfaces. This enables you to run four separate 10G links from one 40G port, increasing port density and enabling flexible network designs.

• Do I need new cables or transceivers?

  Depending on your existing infrastructure, you may reuse compatible SFP/SFP+ transceivers and cables for the breakout links. Fiber-based SFP/SFP+ transceivers and copper DAC cables are common choices for the breakout lanes, but verify compatibility with your network gear and distance requirements.

• Is the QSA module hot-swappable?

  On supported Cisco platforms, QSA modules are designed for hot-swapping, allowing insertion or removal without powering down the device. Always consult your vendor guidelines for platform-specific recommendations and best practices before performing a hot-swap.

• Which devices support Cisco QSA breakout modules?

  This module is intended for Cisco switches and routers that explicitly support QSA breakout functionality. Check Cisco’s interoperability matrices and your device’s hardware/software release notes to confirm compatibility and supported configurations.

• What performance considerations should I expect with a breakout?

  Breaking a 40G link into four 10G links distributes bandwidth across multiple interfaces. Aggregate throughput remains high, but each individual link is limited to 10G. Real-world performance depends on transceiver quality, cable length, network design, and how well the links are managed (including any aggregation or load-balancing configurations).