• 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-VSR4-Arista | 400G OSFP Transceiver, Multi-Mode, 50m, MPO-12

OSFP-400G-VSR4-Arista

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Description

The Arista OSFP-400G-VSR4 is a high-performance 400G OSFP transceiver designed for short-reach data center interconnects. Compliant with 400GBASE-VSR4 standards, it supports up to 50m transmission over OM4 multi-mode fiber using an MPO-12 APC connector. This module delivers 400Gb/s aggregate bandwidth through four 100Gb/s PAM4 optical channels at 850nm, making it ideal for high-density spine-leaf architectures and InfiniBand NDR applications.

Features

400GBASE-VSR4 compliant for 50m multi-mode fiber transmission
- PAM4 modulation technology with DSP chip for enhanced signal integrity
- Four parallel 100Gb/s optical channels for 400Gb/s aggregate bandwidth
- 850nm VCSEL array transmitter for cost-effective MMF deployment
- MPO-12 APC connector reduces back reflectance for improved link performance
- Digital Optical Monitoring (DOM) for real-time diagnostics and fault detection
- Hot-pluggable OSFP form factor with integrated heatsink for optimal thermal management
- Supports both Ethernet and InfiniBand NDR protocols
- Low power consumption (≤9W) for energy-efficient data center operations
- Compliant with OSFP MSA Rev 5.0 and CMIS Rev 5.0 management interface
- Pin photodetector receiver for reliable signal detection
- IEEE 802.3-2022 and IEEE 802.3ck-2022 standards compliance
- Optical interoperability with 400GBASE-SR4 modules for flexible connectivity

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: 400Gb/s aggregate (4 x 100Gb/s per channel)
- Modulation: PAM4 (Pulse Amplitude Modulation 4-level)
- Wavelength: 850nm VCSEL transmitter
- Reach: Up to 50m over OM4 multi-mode fiber (MMF)
- Connector Type: MPO-12 APC (Angled Physical Contact)
- Optical Channels: 4 parallel optical lanes
- Power Consumption: Maximum 9W
- Operating Temperature: 0°C to 70°C
- Compliance: IEEE 802.3-2022 (400GBASE-VR4), IEEE 802.3ck-2022, InfiniBand NDR, OSFP MSA Rev 5.0, CMIS Rev 5.0
- Digital Diagnostics: DOM (Digital Optical Monitoring) support
- Receiver: PIN photodetector
- Interoperability: Fully compatible with 400GBASE-SR4 and 400GBASE-VR4 standards

FAQs

Q: What is the difference between VSR4 and SR4 optical standards?
A: The 400GBASE-VSR4 standard supports 50m reach over OM4 fiber, while 400GBASE-SR4 supports 100m reach. The Arista OSFP-400G-VSR4 is fully compliant with the VSR4 standard and optically interoperable with SR4 modules, providing flexible deployment options for shorter data center links.

Q: Can this transceiver be used with standard MPO-12 connectors?
A: This transceiver requires MPO-12 APC (Angled Physical Contact) fiber connectors specifically. Unlike 40G and 100G parallel MMF optics that use standard PC/UPC connectors, 400G-VSR4 modules require APC connectors to reduce optical back reflectance and ensure optimal performance.

Q: Is this module compatible with InfiniBand networks?
A: Yes, the OSFP-400G-VSR4 supports both 400G Ethernet and InfiniBand NDR applications. It is compliant with InfiniBand Trade Association (IBTA) Specification 1.6, making it suitable for high-performance computing and storage area networks requiring NDR connectivity.

Q: What Arista switches support this OSFP transceiver?
A: This transceiver is designed for Arista switches with OSFP ports that support 400G operation. It requires the port to be configured with 8 electrical lanes running at 50Gb/s PAM4 each. Consult Arista's transceiver compatibility guide for specific platform support and airflow requirements.

Q: Does this module support breakout to lower speeds?
A: While the OSFP-400G-VSR4 is designed for native 400G operation, breakout capabilities depend on the host switch configuration and software support. Some Arista platforms may support breakout to 4x 100G with appropriate cabling and switch configuration, but this should be verified with Arista documentation.

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