HPE X140 40G QSFP+ MPO MM 850NM CSR4 300M Transceiver

Step into ultrafast, reliable data networking with the HPE X140 40G QSFP+ MPO MM 850NM CSR4 300M transceiver. Engineered for data centers, campus networks, and enterprise infrastructures, this high-performance optical module delivers robust 40 gigabit connectivity over multimode fiber. Built to meet the demands of today’s bandwidth-hungry applications—virtualized servers, cloud services, and dense topologies—the X140 CSR4 transceiver combines a compact QSFP+ form factor with the efficiency of 850 nm CSR4 optics. Whether you’re upgrading an existing 10G fabric or deploying new 40G links, this transceiver provides seamless integration, strong link integrity, and scalable performance that helps businesses future-proof their networks. From rack to core, it’s designed to maximize utilization of your fiber infrastructure while minimizing total cost of ownership through reliable operation and easy deployment.

The technology behind the HPE X140 CSR4 40G transceiver centers on 40GBase-CSR4, which aggregates four 10G channels into a single 40G link over multimode fiber. This approach balances high throughput with lower fiber costs, making it ideal for short- to medium-range data center uplinks and campus backbone connections. The 850 nm wavelength is optimized for multi-mode fiber, delivering consistent performance with common MMF brands and grades, including OM2/OM3/OM4 fibers. The MPO/MTP connector supports high-density deployments, enabling efficient cabling layouts in dense racks and cabinets while maintaining optical performance and signal integrity across the link. The result is a plug-and-play solution that simplifies upgrades, reduces network downtime, and enables IT teams to scale bandwidth without overhauling existing infrastructure.

Designed to align with industry standards and enterprise networking requirements, the HPE X140 transceiver offers broad compatibility with a wide range of switches, routers, and switching fabrics that support 40GBASE-CSR4. It’s optimized for reliability in data center environments, with considerations for temperature ranges, reflectivity, and insertion loss that help maintain link stability under load. The modular design supports hot-swapping in compliant devices, meaning you can upgrade or replace components with minimal disruption. This makes the X140 CSR4 a practical choice for organizations seeking to consolidate uplinks, improve application performance, and deliver consistent user experiences across virtualized workloads, storage networks, and high-performance computing clusters.

In addition to raw speed, the X140 40G transceiver emphasizes operational simplicity. It couples a robust optical transmit/receive front end with mature MSA-compliant interfaces, ensuring predictable behavior across diverse vendor ecosystems. The MPO connector is engineered for reliable mating and repeatable performance, reducing the risk of misalignment and repair in busy data centers. Administrators can monitor link status, leverage standard management tools, and perform routine maintenance without specialized procedures. The result is a module that not only delivers impressive throughput but also contributes to a smoother, more manageable network operation.

From a total cost of ownership perspective, the HPE X140 CSR4 transceiver is an economical choice for high-capacity uplinks. By maximizing fiber utilization and enabling compact, high-density deployments, it helps organizations avoid unnecessary fiber upgrades while delivering the bandwidth needed for modern applications. Its 300-meter reach on multimode fiber covers many typical data center rack-to-rack and building-to-building scenarios, providing flexibility in how networks are designed and scaled. For IT teams focused on performance, reliability, and efficiency, the X140 CSR4 module is a dependable option that aligns with best practices for 40G networking and scalable growth.

• 40GBASE-CSR4 compatibility delivers aggregated 40Gbps over multimode fiber, combining four 10G lanes for high-throughput uplinks.
• QSFP+ form factor with MPO/MTP connector supports dense, scalable deployments in data centers and enterprise networks.
• 850 nm wavelength and multimode fiber design optimize cost-per-GB and compatibility with OM2/OM3/OM4 fiber types.
• Hot-swappable, plug-and-play installation in compatible switches and routers, minimizing downtime during upgrades.
• Designed for reliable operation in data-center environments, with solid performance across 0–70°C (typical) and robust optical signaling.

Technical Details of HPE X140 40G QSFP+ MPO MM 850NM CSR4 300M Transceiver

• Product Type: 40G QSFP+ Transceiver
• Interface: QSFP+ with MPO/MTP connector
• Standards: 40GBase-CSR4 (IEEE 802.3ba) compliant for CSR4 short-reach applications
• Wavelength: 850 nm VCSEL
• Fiber Type: Multi-Mode Fiber (MMF: OM2/OM3/OM4 compatible)
• Reach: 300 meters typical on specified MMF grades
• Data Rate: 40 Gbps aggregated (4 x 10 Gbps lanes)
• Application: Data center uplinks, enterprise backbones, and high-density switch fabrics
• Connector: MPO/MTP for high-density cabling
• Form Factor: QSFP+ transceiver module suitable for hot-plug insertion
• Operating Conditions: Designed for standard data-center environmental ranges (temperature and EMI considerations per vendor specs)
• Compatibility: Intended for use with devices that support 40GBase-CSR4 and QSFP+ modules

How to install HPE X140 40G QSFP+ MPO MM 850NM CSR4 300M Transceiver

Installing the HPE X140 CSR4 transceiver is a straightforward process designed to minimize disruption and downtime in active networks. Follow these steps to ensure a secure, reliable installation and optimal performance of your 40G link.

• Power down or place affected equipment in a safe maintenance state as recommended by your network operator’s procedures, then remove the equipment cover to access the QSFP+ port.
• Verify compatibility: confirm that your switch or router supports 40GBase-CSR4 QSFP+ modules and that MPO/MTP fiber is appropriate for your link budget and fiber type.
• Handle the transceiver with care to avoid ESD or physical damage. Align the module with the QSFP+ port and slide it into the slot until it is fully seated and clicks into place.
• Connect the optical fiber: attach an appropriate multimode fiber optic cable with MPO/MTP connectors to the transceiver, ensuring proper polarity and secure termination. Avoid excessive bending radii and confirm connector cleanliness for optimal signal integrity.
• Power on the device and verify operation: check link status through the device’s management interface or CLI. Confirm 40Gbps link establishment, monitor optical metrics if available, and run initial throughput tests to validate performance.

Frequently asked questions

• Q: What is the HPE X140 40G QSFP+ CSR4 transceiver used for? A: It provides a 40Gbps CSR4 link over multimode fiber, ideal for high-density data-center uplinks and scalable 40G networks.
• Q: Which fiber types and distances are supported? A: It uses multimode fiber (MMF) at 850 nm and supports up to approximately 300 meters on suitable MMF (OM2/OM3/OM4 variants), depending on cable quality and system budget.
• Q: Is this module hot-swappable? A: Yes, the transceiver is designed for hot-swapping in compatible switches and routers, allowing maintenance without power-downs in many environments.
• Q: How do I know if my equipment is compatible? A: Check that your switch or router supports 40GBase-CSR4 QSFP+ modules and that the MPO/MTP connector and MMF reach requirements align with your deployment.
• Q: What maintenance considerations should I keep in mind? A: Keep connectors clean, avoid excessive bending, verify firmware/compatibility notes from the vendor, and monitor link health to ensure consistent performance.