• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista OSFP-400G-2FR4-Arista | 400GBASE-2FR4 Transceiver, 2km, Dual LC, SMF

OSFP-400G-2FR4-Arista

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Description

The Arista OSFP-400G-2FR4 is a 400GBASE-2FR4 optical transceiver delivering 400 Gigabit Ethernet over two pairs of duplex single-mode fiber up to 2km. Utilizing 8 optical channels at 50Gb/s each across 1271nm, 1291nm, 1311nm, and 1331nm wavelengths with dual LC connectors, this OSFP module supports breakout to 2x 200GBASE-FR4 for flexible data center and high-speed interconnect deployments. Engineered for cloud, HPC, and enterprise environments requiring reliable, high-bandwidth optical connectivity.

Features

8 x 50Gb/s PAM-4 modulation for efficient 400G transmission
- CWDM4 technology with four wavelengths (1271nm, 1291nm, 1311nm, 1331nm)
- OSFP hot-pluggable form factor for easy installation and replacement
- Supports 400G to 2x 200G breakout without additional breakout cables
- Digital diagnostics monitoring (DDM) for real-time performance tracking
- Low power consumption optimized for high-density deployments
- Compliant with OSFP MSA, IEEE 802.3bs, IEEE 802.3cu-2021, and CMIS standards
- Finned-top heat dissipation design for reliable thermal management
- Interoperable with industry-standard 400GBASE-2FR4 and 200GBASE-FR4 interfaces
- Backward compatible with 200G platforms via breakout mode

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: 400 Gbps
- Optical Standard: 400GBASE-2FR4 (IEEE 802.3cu-2021)
- Wavelengths: 1271nm, 1291nm, 1311nm, 1331nm (4 wavelengths per fiber pair)
- Optical Channels: 8 channels at 50 Gb/s each
- Electrical Interface: 8 x 50Gb/s PAM-4 lanes
- Connector Type: 2x Duplex LC (Dual LC)
- Fiber Type: Single-Mode Fiber (SMF), OS2
- Maximum Reach: 2km
- Breakout Support: 2x 200GBASE-FR4
- Digital Diagnostics Monitoring (DDM): Supported
- Operating Temperature: 0°C to 70°C (commercial)
- Compliance: OSFP MSA, IEEE 802.3bs, CMIS

FAQs

Q: What is the maximum transmission distance for the OSFP-400G-2FR4?
A: The OSFP-400G-2FR4 supports transmission up to 2km over duplex single-mode fiber (SMF), making it suitable for intra-data center and campus deployments.

Q: Can this transceiver be used for breakout configurations?
A: Yes, the OSFP-400G-2FR4 supports breakout to 2x 200GBASE-FR4, allowing optical interoperability with 200G-FR4 QSFP56 transceivers for flexible network architectures.

Q: What type of fiber and connectors does this module use?
A: This module uses two pairs of duplex single-mode fiber (4 fibers total) with dual duplex LC connectors, carrying 400G over 8 optical channels at 50Gb/s each.

Q: Is the OSFP-400G-2FR4 compatible with QSFP-DD platforms?
A: The OSFP form factor is designed for OSFP ports. For QSFP-DD platforms, Arista offers equivalent QSFP-DD 400G-2FR4 modules. Both share the same optical interface and can interoperate over fiber.

Q: What are typical use cases for this transceiver?
A: Ideal for 400G data center spine-leaf architectures, cloud infrastructure, high-performance computing (HPC), AI clusters, and enterprise networks requiring high-bandwidth, medium-reach optical connectivity.

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