Fiber optic transceiver CBO DEM-QX01Q-SR4-BO 40,000 Mbit/s 850 nm

CBO DEM-QX01Q-SR4-BO is a fiber optic transceiver module that delivers a 40,000 Mbit/s (40Gb/s) data rate over multimode fiber at an 850 nm wavelength. Engineered for short-reach links, the module fits common QSFP form factors and is suitable for high-density environments where compact, hot-pluggable modules are required. Typical deployment scenarios include data center aggregation, server uplinks and switch-to-switch connections where consistent low-latency optical links are needed.

Advantages

The transceiver provides a standardized 40Gb/s interface for short-range multimode fiber, enabling high-throughput connectivity with low power consumption. Its hot-swappable design simplifies maintenance and upgrades without disrupting active equipment. The optical 850 nm wavelength and multimode compatibility reduce cabling complexity for short runs and allow integration into existing MPO/parallel optics infrastructures. Mechanical compatibility with QSFP ports supports high-density switch and server installations.

Suitable for

• Data center aggregation and spine-leaf fabrics
• Server uplinks and top-of-rack switch connections
• High-speed switch-to-switch links within racks or between adjacent racks
• Storage area network (SAN) connectivity over short multimode fiber

Key specifications

• Nominal data rate: 40,000 Mbit/s (40 Gb/s)
• Operating wavelength: 850 nm for multimode fiber
• Target reach: short-range multimode links (typically within a data center)
• Form factor compatibility: QSFP-class hot-pluggable transceiver
• Fiber type: multimode fiber, parallel/MPO-style connections

How to use

Install the transceiver into a compatible QSFP port on a switch, server adapter or other network device while the host supports hot-pluggable optics. Connect appropriate multimode fiber cables with the corresponding MPO or parallel connector arrangement, observe proper fiber handling and maintain correct polarity for parallel optics. After insertion, verify link status and speed on the host device and monitor optical signal parameters through the device management interface if available.

Usage recommendations

Use multimode fiber rated for the intended reach, ensure MPO connectors are clean and undamaged, and follow equipment vendor guidelines for interoperability. For reliable performance, keep transceiver firmware and host device drivers up to date and avoid bending fiber beyond specified minimum bend radii.