• Silver-colored arista qdd-400g-vsr4 sfp+ transceiver modules with blue plastic handles and metallic connectors
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Arista

Arista QDD-400G-VSR4 | 400G QSFP-DD VSR4 Transceiver, MPO-12 APC, 50m OM4

Arista QDD-400G-VSR4 | 400G QSFP-DD VSR4 Transceiver, MPO-12 APC, 50m OM4

QDD-400G-VSR4

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Description

The Arista QDD-400G-VSR4 is a 400GBASE-VSR4 QSFP-DD optical transceiver designed for very short reach data centre interconnects over parallel multimode fibre. Using an MPO-12 APC connector, it delivers 400 Gigabit Ethernet across up to 50 metres of OM4 parallel MMF — making it ideal for high-density spine-leaf architectures, top-of-rack to aggregation links, and intra-data centre connectivity where ultra-high bandwidth and low latency are critical.

Compatible with Arista's 7800, 7500, and 7300 series platforms, this transceiver supports 8x50G PAM4 electrical signalling and conforms to the 400GBASE-VSR4 IEEE and MSA specifications. It is hot-swappable and designed for low power consumption in dense 400G deployments. Upgrade your network with gear from iptrading.com.au — Australia's IT hardware specialists.

Features

- 400 Gbps aggregate bandwidth in a compact QSFP-DD form factor
- VSR4 design optimised for up to 50m OM4 parallel multimode fibre links
- MPO-12 APC connector for low-loss parallel fibre connectivity
- 8-lane 50G PAM4 electrical interface for high-density 400G deployments
- VCSEL-based 850nm parallel optics for cost-effective short-reach links
- Hot-swappable for non-disruptive installation and replacement
- Compliant with 400GBASE-VSR4 IEEE 802.3bs and QSFP-DD MSA standards
- Low power consumption suitable for high-density chassis deployments
- Compatible with Arista 7800, 7500R3, and 7300X3 series platforms

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

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

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Technical Specifications

FAQs

Technical Specifications

- Form factor: QSFP-DD (Double Density)
- Data rate: 400 Gbps (400GBASE-VSR4)
- Electrical interface: 8x50G PAM4
- Connector type: MPO-12 APC (female)
- Fibre type: Parallel OM4 multimode fibre
- Maximum reach: up to 50 metres over OM4 MMF
- Wavelength: 850 nm (VCSEL-based)
- Operating temperature: 0°C to 70°C (commercial)
- Hot-swappable: Yes
- Compliance: 400GBASE-VSR4 IEEE 802.3bs, QSFP-DD MSA

FAQs

Q: What fibre type and reach does the QDD-400G-VSR4 support?
A: The QDD-400G-VSR4 supports up to 50 metres over parallel OM4 multimode fibre using an MPO-12 APC connector. It is designed for very short reach (VSR) intra-data centre applications.

Q: Which Arista switches are compatible with this transceiver?
A: This transceiver is compatible with Arista platforms that feature QSFP-DD ports, including the 7800 Series, 7500R3 Series, 7300X3 Series, and other 400G-capable Arista switches and routers.

Q: What is the electrical signalling used in the QDD-400G-VSR4?
A: The transceiver uses 8x50G PAM4 (Pulse Amplitude Modulation 4-level) electrical signalling to achieve the 400 Gbps aggregate data rate over the QSFP-DD interface.

Q: Can I use an MPO-12 UPC cable with this transceiver?
A: The QDD-400G-VSR4 uses an MPO-12 APC (Angled Physical Contact) connector. While APC and UPC connectors are physically compatible, mixing connector types may introduce additional insertion loss. It is recommended to use APC-to-APC cabling for optimal performance.

Q: Can I purchase the Arista QDD-400G-VSR4 in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware specialist and can supply the Arista QDD-400G-VSR4 transceiver. Contact the team for pricing, availability, and volume purchasing options.

Q: Is this transceiver hot-swappable?
A: Yes, the QDD-400G-VSR4 is a hot-swappable QSFP-DD transceiver, allowing it to be inserted or removed from compatible Arista equipment without powering down the host system.

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