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

The BlueOptics QSFP-40G-ESR4-FR-BO is a QSFP fiber optic transceiver module designed for 40 Gigabit Ethernet links over multimode fiber. It supports a maximum data rate of 40 Mbit/s at an operating wavelength of 850 nm and a maximum link distance of up to 300 m using MTP/MPO connectors. The compact module weighs approximately 40 g and includes support for digital diagnostics (DDM/DOM) to monitor supply voltage, laser bias current, transmitter output power, received input power and temperature in real time. The module is designed to comply with QSFP MSA mechanical and electrical specifications for broad interoperability with network switches, routers, storage systems and other devices that accept QSFP-40G transceivers.

Advantages

This BlueOptics QSFP transceiver provides standardized QSFP form-factor compatibility and MTP/MPO multimode fiber connectivity for short-range 40G links, offering reliable performance with an MTBF of approximately 1,000,000 hours. Integrated digital diagnostics simplify maintenance and fault finding by reporting electrical and optical parameters. The small, hot-pluggable module supports common high-speed protocols such as Ethernet and Fibre Channel over Ethernet and is built to industry standards for CE and RoHS compliance.

Suitable for

• 40 Gigabit Ethernet uplinks between switches and aggregation equipment
• High-speed interconnects in data center switch-to-switch fabrics
• Connections between routers, storage arrays and server clusters over multimode fiber
• Short-range fiber links in enterprise and campus networks (up to 300 m)

Key specifications

• Maximum data transfer rate: 40 Mbit/s
• Wavelength: 850 nm (transmit and receive)
• Maximum transfer distance: up to 300 m over multimode fiber
• Interface type: 40 Gigabit Ethernet (QSFP)
• Fiber connector: MTP/MPO
• Digital Diagnostics Monitoring (DDM/DOM) support
• Typical weight: 0.04 kg
• Compliance: QSFP MSA mechanical/electrical profile, CE and RoHS

How to use

Install the BlueOptics QSFP-40G-ESR4-FR-BO into a compatible QSFP slot on your network device while the device is powered on or per the vendor's hot-plug guidance. Connect an appropriate MTP/MPO multimode fiber patch cord to the transceiver and to the destination device or patch panel. Ensure the host hardware supports 40G QSFP transceivers and, if you require DDM/DOM telemetry, verify that the host exposes those diagnostics. Follow the equipment vendor's instructions for port configuration and link negotiation to enable the 40G link.

Recommendations

For optimal performance, use high-quality multimode fiber and MTP/MPO patch cords rated for 850 nm transmission, keep optical connectors clean and verified, and confirm your switch/router platform firmware supports 40GBASE-ESR4 QSFP modules and DDM functions. If interoperability is critical, test the transceiver in your hardware before wide deployment.