• 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 QDD-400G-LR4-Arista | 400G QSFP-DD LR4 Transceiver, Duplex LC, 10km

QDD-400G-LR4-Arista

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Description

This 400GBASE-LR4 transceiver in the QSFP-DD form factor carries 400GbE over duplex single-mode fibre with standard LC connectors, up to 10km. It suits data centre and campus 400G links such as leaf-spine uplinks, inter-building runs and short data centre interconnects.

The four CWDM lanes operate at 1271, 1291, 1311 and 1331 nm over G.652 single-mode fibre. Transmit power is -2.7 to +5.1 dBm per lane and receive power is -9 to +5.1 dBm per lane. Maximum power consumption is 12 W, the same class as other 400G QSFP-DD optics in the family. The duplex LC interface means no parallel-fibre MPO cabling is required, which separates it from the 10km PLR4 variant that uses MPO-12 APC. It reaches further than the 2km FR4 duplex optic and draws less power than the 14W LR8 option.

It is intended for Arista QSFP-DD 400G ports and is optically interoperable with other 400GBASE-LR4 optics, including the 400G OSFP LR4 module.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- 400GbE over duplex single-mode fibre up to 10km
- Standard duplex LC connectivity, no parallel-fibre MPO cabling needed
- Four-lane CWDM optics in the QSFP-DD form factor
- 12 W maximum power draw, in line with other 400G QSFP-DD optics
- Optically interoperable with other 400GBASE-LR4 optics
- Same LR4 optics used in dual-400G 2LR4 modules for 800G ports

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

- Standard: 400GBASE-LR4
- Form factor: QSFP-DD
- Connector: LC (duplex)
- Fibre type: Single-mode, SMF G.652
- Maximum reach: 10km
- Wavelengths: 1271, 1291, 1311, 1331 nm
- Tx power: -2.7 to +5.1 dBm per lane
- Rx power: -9 to +5.1 dBm per lane
- Maximum power consumption: 12 W
- Dimensions, QSFP-DD Type 1 (H x W x D): 13.5 x 18.4 x 78.3 mm
- Dimensions, QSFP-DD Type 2 (H x W x D): 13.5 x 18.4 x 93.3 mm
- Operating case temperature: 0 to 70 C
- Storage temperature: -40 to 70 C
- Relative humidity: 5 to 95%
- Operating altitude: 0 to 10,000 ft

FAQs

Q: What fibre and connector does it use?
A: It uses duplex single-mode fibre (G.652) with standard LC connectors. No MPO or parallel-fibre cabling is required.

Q: How does it differ from the FR4, PLR4 and LR8 400G optics?
A: It reaches 10km over duplex LC, compared with 2km for the FR4. The PLR4 also reaches 10km but needs MPO-12 APC parallel fibre. The LR8 reaches 10km at a higher 14W power draw, while this module draws 12 W maximum.

Q: What power does it draw?
A: Maximum power consumption is 12 W, supplied by the host QSFP-DD port.

Q: Which devices does it work with?
A: It is designed for Arista QSFP-DD 400G ports. Check Arista's Transceiver and Cable Guide for supported platforms and minimum EOS versions.

Q: Can it link to a different 400GBASE-LR4 optic at the far end?
A: Yes. It is optically interoperable with other 400GBASE-LR4 optics, including the OSFP-400G-LR4 and the 400GBASE-LR4 lanes of 2LR4 modules.

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