BlueOptics QSFP Transceiver A5U9-BO 40GBASE-ESR4 MPO/MTP Multimode 4×850nm 300m 0–70°C

BlueOptics QSFP Transceiver A5U9-BO 40GBASE-ESR4 MPO/MTP Multimode 4×850nm 300m is a compact QSFP form-factor optical module designed for 40 Gigabit Ethernet links over multimode fiber. It uses an MPO/MTP connector and four parallel 850 nm lanes to deliver aggregate 40 Gbit/s bandwidth with reach up to 300 meters over compatible multimode cabling. The transceiver operates across a commercial temperature range and is intended for use in data center uplinks, switch-to-switch connections and aggregation layers in campus and enterprise networks.

Advantages

The module provides a high-density 40G interface in a small QSFP package while maintaining multimode fiber compatibility and MPO/MTP connectivity for parallel optics. Its four-lane design at 850 nm supports standard multimode cabling distances to 300 meters, enabling flexible placement of switches and equipment within racks and across rooms. The rated operating temperature range supports conventional data center and telecom equipment environments.

Suitable for

Key specifications

How to use

Install the QSFP transceiver into a compatible QSFP port on switches, routers or media converters ensuring the host device supports 40GBASE-ESR4 optics. Connect MPO/MTP multimode fiber cables with correct polarity and verified fiber type (OM3/OM4 as applicable) to achieve the specified reach. Verify link status on the host device and monitor optical diagnostics if supported. Handle the transceiver and fiber connectors with appropriate electrostatic discharge precautions and keep dust caps on connectors when not in use.

Recommendations

For reliable performance, use certified multimode fiber (OM3 or OM4) and MPO/MTP trunk assemblies, confirm polarity and cleanliness of connectors, and ensure the host system firmware supports standard 40GBASE-ESR4 modules. Avoid exceeding the specified temperature range and inspect connectors for contamination before installation.