• Silver-colored Arista OSFP-400G-LR4 SFP+ transceiver modules with blue handles and metallic connectors for 10km single-mode use
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Arista

Arista OSFP-400G-LR4 | 400G OSFP Transceiver, Single-Mode, 10km, LC

OSFP-400G-LR4

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Description

The Arista OSFP-400G-LR4 is a 400GBASE-LR4 optical transceiver designed for high-speed data centre interconnects up to 10km over single-mode fibre. Featuring CWDM4 wavelength multiplexing and PAM4 modulation, this OSFP module delivers 400Gbps throughput with low latency and power efficiency. Ideal for spine-leaf architectures, cloud infrastructure, and enterprise campus uplinks.

Features

IEEE 802.3bs 400GBASE-LR4 compliant for 400 Gigabit Ethernet
- CWDM4 wavelength multiplexing (1271/1291/1311/1331nm) for efficient single-fibre transmission
- PAM4 modulation technology for high spectral efficiency
- 8x 50Gbps electrical lanes (400GAUI-8 interface)
- Hot-pluggable OSFP form factor for easy field replacement
- Digital diagnostics monitoring (DDM) for temperature, voltage, optical power, and bias current
- CMIS 4.0 management interface for advanced configuration and monitoring
- Low latency and power consumption optimised for data centre environments
- RoHS compliant and meets industry EMI/EMC standards
- Compatible with Arista 400G OSFP-capable switches and routers

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Form Factor: OSFP (Octal Small Form-factor Pluggable)
- Data Rate: 400Gbps (8x 50Gbps PAM4 electrical lanes)
- Wavelength: CWDM4 (1271nm, 1291nm, 1311nm, 1331nm)
- Transmission Distance: Up to 10km over OS2 single-mode fibre
- Connector: Duplex LC/UPC
- Fibre Type: Single-mode fibre (SMF)
- Modulation: PAM4 (Pulse Amplitude Modulation 4-level)
- Standards Compliance: IEEE 802.3bs 400GBASE-LR4, OSFP MSA, CMIS 4.0
- Digital Diagnostics: DDM/DOM support for real-time monitoring
- Operating Temperature: 0°C to 70°C (commercial)
- Power Consumption: <15W (typical for 400G OSFP LR4)

FAQs

Q: What is the maximum transmission distance for the OSFP-400G-LR4?
A: The OSFP-400G-LR4 supports transmission distances up to 10km over OS2 single-mode fibre using CWDM4 wavelengths and duplex LC connectors.

Q: Is this transceiver compatible with QSFP-DD 400G ports?
A: The OSFP-400G-LR4 uses the OSFP form factor. While OSFP and QSFP-DD both support 400G with 8x 50Gbps PAM4 lanes, they are mechanically different. Arista offers both OSFP and QSFP-DD versions of the LR4 module for different platform requirements.

Q: What applications is the OSFP-400G-LR4 best suited for?
A: This transceiver is ideal for data centre spine-leaf interconnects, campus core uplinks, 400G switch-to-switch links, and high-performance computing environments requiring 10km reach over single-mode fibre.

Q: Does the OSFP-400G-LR4 support breakout configurations?
A: The OSFP-400G-LR4 is designed for native 400G point-to-point links. For breakout applications, Arista offers alternative modules such as the OSFP-400G-2FR4, which supports 2x 200G breakout configurations.

Q: What is the difference between 400GBASE-LR4 and 400GBASE-FR4?
A: Both use CWDM4 wavelengths over single-mode fibre, but LR4 supports up to 10km transmission distance, while FR4 is specified for up to 2km. LR4 is typically used for longer data centre interconnects and metro applications.

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