QSFP Transceiver BlueOptics BO25K859S2D 40GBASE-SR4 Multimode Fiber 150 m

BlueOptics BO25K859S2D is a compact QSFP transceiver engineered for short‑reach 40 Gigabit Ethernet links over multimode fiber. The module supports 40GBASE‑SR4 transmission up to 150 m on appropriate multimode cabling and fits hot‑pluggable QSFP form‑factor ports for straightforward installation and service in data center and enterprise network environments.

Advantages

The transceiver provides a high-density, low-power solution for 40G connectivity with a standardized QSFP interface that simplifies upgrades and replacements. Its multimode SR4 design enables parallel fiber transmission for low-latency, high-throughput links in spine/leaf, aggregation and server interconnect roles. Hot‑pluggability reduces downtime during maintenance while the compact module footprint conserves slot space in switches and optical equipment.

Suitable for

Key specifications

How to use

Install the QSFP transceiver into a compatible QSFP port on your switch or server I/O card until it seats securely. Connect an appropriate multimode MPO/MTP patch cable to the transceiver, ensuring correct polarity and fiber type for 40GBASE‑SR4 operation. The module is hot‑pluggable, so it can be inserted or removed while the host equipment is powered, but follow host vendor instructions to avoid disruption. Verify link status and speed through the host device management interface after installation.

Recommendations

Use verified multimode cabling with recommended OM3/OM4 specifications and MPO/MTP connectors to achieve the listed reach. Ensure proper airflow and compliance with the host device’s thermal guidelines, and confirm transceiver compatibility with switch firmware or vendor compatibility lists before deployment.