QSFP Transceiver Module BlueOptics QSFP-40G-ESR4-SP-BO 40 Mbit/s 850 nm

The BlueOptics QSFP-40G-ESR4-SP-BO is a QSFP fiber optic transceiver module designed for 40 Gigabit Ethernet links over multimode fiber. Operating at a wavelength of 850 nm and supporting a maximum data rate of 40 Mbit/s, this compact module uses an MTP/MPO connector and is specified for reach up to 300 m. With a small form factor and a weight of approximately 40 g, it is intended for integration into switches, routers and other network devices that accept QSFP modules and MSA-compliant optics.

Advantages

The module follows MSA QSFP mechanical and electrical standards to ensure interoperability and straightforward plugging into compatible ports. Built with digital diagnostics support, it can report parameters such as supply voltage, laser bias current, transmit power, receive power and temperature, which simplifies monitoring and troubleshooting. Components are selected to meet industrial quality standards and the transceiver is specified with a long MTBF, providing stable operation for high-availability network applications.

Suitable for

• 40 Gigabit Ethernet uplinks and aggregation in data centers
• High-speed switch-to-switch or switch-to-server links over multimode fiber
• Storage area networks and Fibre Channel over Ethernet deployments
• Campus and enterprise backbone connections up to 300 m

Key specifications

• Form factor: QSFP (Quad Small Form-factor Pluggable)
• Wavelength: 850 nm
• Maximum data rate: 40 Mbit/s
• Maximum transfer distance over multimode fiber: 300 m
• Connector type: MTP/MPO
• Ethernet interface: 40 Gigabit Ethernet
• Weight: 0.04 kg
• Mean time between failures (MTBF): 1,000,000 hours

How to use

Install the QSFP transceiver into a matching QSFP port on a switch, router or server while the host device is powered down or following the host manufacturer's hot-swap guidance. Connect an appropriate MTP/MPO multimode fiber patch cable to the module and route the other end to the corresponding transceiver or patch panel. Verify link negotiation and, if supported by the platform, enable and monitor digital diagnostics (DDM/DOM) to observe real-time operating parameters. Ensure the host device firmware or software supports the module for full compatibility.

Recommendations

Use multimode fiber and quality MTP/MPO patch cords rated for 850 nm to achieve the specified 300 m reach. Confirm that the networking hardware supports QSFP MSA modules and DDM/DOM if you plan to use diagnostics. Follow ESD precautions when handling the transceiver and avoid exposing the optical interface to dust; keep protective caps on connectors when not in use.