BlueOptics BO29X139S5D Compatible Juniper 740-085351 QSFP-DD Transceiver, MPO-12/MTP-12, 400GBASE-DR4, 500m over SMF

For data centers that demand both density and distance, the BlueOptics BO29X139S5D QSFP-DD transceiver is a standout alternative to the original Juniper 740-085351. It combines the compact QSFP-DD form factor with 400GBASE-DR4 technology and a 500 m reach over single-mode fiber, enabling high-throughput links without sacrificing port count. Fully MSA-compliant and CMIS 4.0 ready, it integrates seamlessly into Juniper switches and routers while delivering the reliability of a rigorously tested third-party module.

Highlights

• 400 Gbps total bandwidth via 4x 100G PAM4 lanes
• MPO-12/MTP-12 female connector for 8-fiber parallel optics
• Supports up to 500 m on standard single-mode fiber (SMF)
• Hot-pluggable with digital diagnostics monitoring (DDM)
• Low power consumption: typically under 12 W
• Commercial temperature range 0°C to 70°C
• Equivalent to Juniper P/N 740-085351

In daily use

This transceiver is built for 400G Ethernet fabrics in enterprise and cloud data centers. The QSFP-DD form factor doubles the lane count of QSFP28 while keeping the same port footprint, so you can upgrade capacity without replacing existing cabling infrastructure. The MPO-12/MTP-12 interface uses eight fibers (four transmit, four receive), and the 1310 nm wavelength plan is optimized for SMF, avoiding modal dispersion issues common with multimode at high speeds. With host-side KR4 FEC and CMIS 4.0 management, link health and performance can be monitored in real time, simplifying troubleshooting and capacity planning.

Full specifications

• Form Factor: QSFP-DD
• Data Rate: 400 Gbps (4x 100G PAM4)
• Ethernet Standard: 400GBASE-DR4
• Connector Type: MPO-12/MTP-12 (Female)
• Fiber Type: Single-Mode Fiber (SMF)
• Max Reach: 500 meters
• Wavelength: 4x 1310 nm
• Transmitter Type: 4x 100G PAM4 EML
• Receiver Type: 4x 100G PAM4 PIN
• Power Consumption: < 12 W (Typical)
• Operating Temperature: 0°C to 70°C
• Digital Diagnostics Monitoring (DDM): Yes
• Hot-Pluggable: Yes
• MSA Compliance: QSFP-DD MSA, CMIS 4.0
• Forward Error Correction (FEC): KR4 FEC (Host-side)
• Voltage: 3.3 V
• Certifications: CE, FCC, RoHS

Final note

Engineered for seamless Juniper integration, this transceiver delivers carrier-grade performance and reliability, making it an ideal choice for high-density 400G deployments.