• Silver-colored arista qdd-400g-sr8-c sfp+ transceiver modules with blue handles and metallic connectors for 400g qsfp-dd use
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Arista

Arista QDD-400G-SR8-C | 400G QSFP-DD SR8 Transceiver, MPO-16, 100m OM4

Arista QDD-400G-SR8-C | 400G QSFP-DD SR8 Transceiver, MPO-16, 100m OM4

QDD-400G-SR8-C

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Description

The Arista QDD-400G-SR8-C is a 400GBASE-SR8 QSFP-DD optical transceiver engineered for high-density data centre interconnects, HPC clusters, and enterprise core aggregation. Operating across 8 parallel lanes at 50Gbps PAM-4 each, it delivers 400Gbps aggregate throughput via an MPO-16 APC connector with reaches up to 70m on OM3 and 100m on OM4 multimode fibre. The channelised ('C') variant adds significant deployment flexibility, supporting 8x 50G-SR, 8x 25G-SR, 400GBASE-SR4.2 (400G-BIDI), 4x 100GBASE-BIDI (100G-SRBD), and 4x 100GBASE-SR1.2 configurations from a single module.

Compliant with IEEE 802.3bs and QSFP-DD MSA CMIS Rev4.0, this hot-pluggable transceiver integrates digital diagnostic monitoring (DDM/DOM) and FEC support for reliable high-speed links. It also supports breakout to 2x 200G-SR4 using MPO-16 to 2x MPO-8 multimode patch cables, enabling flexible cabling architectures and compatibility with 200G QSFP56 and 2x200G QSFP112 NICs. RoHS compliant and built for commercial operating environments. Available now at iptrading.com.au — competitive prices and local support.

Features

- Channelised ('C') variant supports 400GBASE-SR8, 8x 50G-SR, and 8x 25G-SR configurations from a single module
- Additional operational modes: 400GBASE-SR4.2 (400G-BIDI), 4x 100GBASE-BIDI (100G-SRBD), and 4x 100GBASE-SR1.2
- Breakout support: 2x 200G-SR4 via MPO-16 to 2x MPO-8 multimode patch cables
- Compatible with 200G QSFP56 switch/NIC interconnects and 2x200G QSFP112 NICs
- 8 independent full-duplex transmit and receive channels for maximum flexibility
- Hot-pluggable QSFP-DD form factor for non-disruptive installation
- Digital Diagnostic Monitoring (DDM/DOM) for real-time performance visibility
- FEC (Forward Error Correction) support for robust link integrity at 400G speeds
- Ideal for data centre interconnects, HPC, enterprise core/aggregation, and service provider networks
- RoHS compliant — meets lead-free environmental standards

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

Datasheet

Technical Specifications

- Form Factor: QSFP-DD
- Aggregate Data Rate: 400Gbps (8 x 50Gbps PAM-4 lanes)
- Wavelength: 850nm (all 8 parallel lanes)
- Connector: MPO-16 APC
- Max Reach: 70m over OM3, 100m over OM4 multimode fibre
- Modulation: PAM-4 (8x50Gb/s)
- Electrical Interface: 400GAUI-8 / CEI-56G-VSR-PAM4
- Supported Standards: IEEE 802.3bs, QSFP-DD MSA CMIS Rev4.0
- Operating Temperature: 0°C to 70°C (commercial grade)
- Digital Diagnostic Monitoring (DDM/DOM): Supported
- FEC: Supported
- RoHS Compliant: Yes (lead-free)

FAQs

Q: What fibre types and distances does the QDD-400G-SR8-C support?
A: The QDD-400G-SR8-C supports reaches of up to 70m over OM3 and up to 100m over OM4 parallel multimode fibre, using an MPO-16 APC connector.

Q: What operational modes are available on this transceiver?
A: As a channelised ('C') variant, it supports 400GBASE-SR8, 8x 50G-SR, 8x 25G-SR, 400GBASE-SR4.2 (400G-BIDI), 4x 100GBASE-BIDI (100G-SRBD), and 4x 100GBASE-SR1.2 — providing broad deployment flexibility within a single module.

Q: Can I use the QDD-400G-SR8-C in a breakout configuration?
A: Yes. Using an MPO-16 to 2x MPO-8 multimode patch cable, the transceiver supports breakout to 2x 200G-SR4, enabling flexible cabling architectures for high-density environments.

Q: Is the QDD-400G-SR8-C compatible with non-Arista switches and NICs?
A: The transceiver complies with IEEE 802.3bs and QSFP-DD MSA CMIS Rev4.0 standards and is compatible with 200G QSFP56 switches/NICs and 2x200G QSFP112 NICs. Compatibility with specific third-party platforms should be confirmed prior to deployment.

Q: Does this transceiver support digital diagnostic monitoring?
A: Yes. The QDD-400G-SR8-C includes full Digital Diagnostic Monitoring (DDM/DOM) support, allowing real-time monitoring of temperature, voltage, TX power, and RX power for proactive network management.

Q: Can I purchase the Arista QDD-400G-SR8-C in Australia through IP Trading?
A: Yes. IP Trading supplies the Arista QDD-400G-SR8-C to Australian businesses with competitive pricing and local support. Visit iptrading.com.au or contact the team directly for volume pricing and availability.

Datasheet

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