OSFP-800G-2FR4 Compatible
800GBASE-2×FR4 OSFP PAM4 Optical Transceiver
(SMF, 1271/1291/1311/1331 nm, 2 km, Dual Duplex LC/UPC, DOM, Closed Finned Top)
The 800GBASE-2×FR4 OSFP optical transceiver module is designed to deliver 800 Gigabit Ethernet connectivity over distances of up to 2 km on OS2 single-mode fiber (SMF). The module operates using four CWDM wavelengths per 400G channel (FR4)—1271 nm, 1291 nm, 1311 nm, and 1331 nm—and utilizes dual duplex LC/UPC connectors.
The transceiver is compliant with OSFP MSA, CMIS Rev 5.0, and IEEE 802.3cu / IEEE 802.3ck standards, ensuring broad interoperability across modern 800G Ethernet platforms. Integrated Digital Diagnostic Monitoring (DDM/DOM) provides real-time visibility into optical and electrical operating parameters.
The twin-port OSFP Closed Finned Top design is optimized for air-cooled Ethernet switches and high-density systems. It supports deployment in spine–leaf architectures, switch-to-switch interconnects, top-of-rack (ToR) to network adapter links, and connections to BlueField-3 DPUs in compute and storage platforms. This makes the module well suited for HPC, AI workloads, and cloud data centers.
Closed Finned Top Design – Explained
The Closed Finned Top architecture incorporates a finned heatsink enclosed by a protective top cover, forming a controlled airflow channel. This design provides:
• Improved thermal performance in forced-air environments
• Mechanical protection of cooling fins
• Compatibility with air-cooled and liquid-cooled platforms
• Enhanced reliability in high-power 800G systems
Technical Specifications
• Product Compatibility: Arista Compatible
• Form Factor: Twin-port OSFP (Closed Finned Top)
• Maximum Data Rate: 850 Gbps (8 × 106.25 Gbps)
• Modulation Format: PAM4
Optical Characteristics
• Optical Standard: 800GBASE-2×FR4
• Wavelengths: 1271 nm, 1291 nm, 1311 nm, 1331 nm
• Maximum Reach: 2 km
• Fiber Type: OS2 Single-Mode Fiber (SMF)
• Connector Type: Dual Duplex LC/UPC
Optical Performance
• Transmitter Type: EML
• Receiver Type: PIN
• Transmit Power (Tx): –3.2 to +4.4 dBm
• Minimum Receiver Sensitivity (Rx): –7.2 dBm
• Receiver Overload: +4.4 dBm
• Optical Power Budget: 4 dB
• Extinction Ratio: > 3.5 dB
Electrical & Functional Features
• Modulation (Electrical): 8 × 100G PAM4
• Modulation (Optical): Dual 4 × 100G PAM4 (2×FR4)
• Maximum Power Consumption: = 16.5 W
• Digital Diagnostics (DDM/DOM): Supported
• Operating Temperature: 0 to 70 °C (32 to 158 °F)
Standards & Compliance
• OSFP MSA Hardware: Rev 4.1
• CMIS: Rev 5.0
• IEEE 802.3cu-2021
• IEEE P802.3ck D2.2
Applications
• 800G Ethernet
• Data center interconnects (DCI)
• Spine–leaf switch architectures
• Top-of-rack to server / NIC connectivity
• HPC, AI, and cloud data center networks
Warranty
• Warranty: 5 Years