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

The BlueOptics QSFP-40G-ESR4-LC-BO is a QSFP fiber optic transceiver module for 40 Gigabit Ethernet links. It operates at an 850 nm wavelength, supports multimode fiber with an MPO/MTP connector and provides a maximum data transfer rate of 40 Mbit/s across distances up to 300 m. The module is lightweight (approx. 40 g) and manufactured to MSA-compliant mechanical and electrical specifications, offering a design intended for integration with switches, routers, storage systems and other network hardware that support QSFP 40GBASE-ESR4 transceivers.

Advantages

The transceiver offers compatibility with industry-standard QSFP interfaces and is produced using components that meet common industrial quality standards, enabling long mean time between failures (MTBF ~1,000,000 hours). Its MPO/MTP connector and multimode operation provide simultaneous send/receive capability over a single fiber assembly. Digital diagnostic monitoring (DDM/DOM) support simplifies remote monitoring of optical parameters where host hardware supports this feature. Compact size and low weight make the module easy to handle and install in populated racks and high-density ports.

Suitable for

• Data center aggregation and spine switches
• Server-to-switch high-speed uplinks
• Storage area networks and NAS interconnects
• High-bandwidth campus or enterprise backbone links

Key specifications

• Interface type: 40 Gigabit Ethernet (QSFP form factor)
• Wavelength: 850 nm (transmit and receive)
• Maximum data rate: 40 Mbit/s
• Maximum transfer distance: up to 300 m over multimode fiber
• Fiber connector: MPO/MTP (multifiber)
• Weight: approximately 0.04 kg
• Diagnostics: digital diagnostic monitoring (DDM/DOM) supported when host hardware provides access

How to use

Install the QSFP transceiver into a compatible QSFP slot on your switch, router or storage device, ensuring the host device supports 40GBASE-ESR4 transceivers and any required DDM/DOM functions. Connect an appropriate MPO/MTP multimode fiber patch cord or patch panel link between transceivers; observe correct orientation and mating of the MPO/MTP connector. After insertion, verify link status and configuration on the host device; adjust interface settings if necessary to match the network protocol (Ethernet, Fibre Channel over Ethernet, etc.). For removal, follow hot-swap guidelines of the host hardware and handle the module by its edges to avoid contamination of the optical interfaces.

Recommendations

Use OM3/OM4 multimode fiber for optimal reach and performance up to the specified 300 m, keep MPO/MTP connectors clean and protected with dust caps when not in use, and verify host compatibility for DDM/DOM access. Follow manufacturer and data center best practices for ESD protection during handling and for patching in high-density environments.