• Silver-colored Arista QDD-400G-SRBD1 sfp+ transceiver modules with blue handles and metallic connectors for 400G QSFP-DD use
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Arista

Arista QDD-400G-SRBD1 | 400G QSFP-DD BiDi Transceiver, MPO-12, 100m OM4

QDD-400G-SRBD1

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Description

This 400G QSFP-DD bidirectional multimode transceiver is built for data centre leaf and spine links, and for upgrading existing 40G or 100G parallel multimode MPO-12 fibre to 400GE without changing the fibre plant. It is part of the Arista 400G QSFP-DD optics range and complies with 400GBASE-SR4.2 under IEEE 802.3-2022.

It uses an MPO-12 UPC connector over four fibre pairs, eight fibres in total, with two wavelengths (855nm and 908nm) per fibre and 50G PAM-4 modulation per lane. Reach is 70m over OM3 and 100m over OM4 multimode fibre. Maximum power consumption is 12W, with an operating case temperature of 0 to 70C. The module can be configured through EOS for 400G point-to-point, 4x100G-BIDI breakout or 4x100G-SR1.2 breakout.

In breakout mode it interoperates with QSFP-100G-SRBD and 100G-SR1.2 QSFP modules at up to 100m over multimode fibre. It installs in Arista QSFP-DD ports, and the port must be set to 400G or breakout mode in EOS. The OSFP equivalent is OSFP-400G-SRBD1.

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

Features

- Uses the widely deployed MPO-12 UPC connector, so existing 40G-SR4 and 100G-SR4 parallel multimode fibre can be upgraded to 400GE without changing the fibre
- Software configurable through EOS for 400GBASE-SR4.2, 4x100G-BIDI breakout or 4x100G-SR1.2 breakout
- Interoperates with QSFP-100G-SRBD and 100G-SR1.2 QSFP modules when breaking out
- Compliant with IEEE 400GBASE-SR4.2
- Uses only 8 fibres (4 pairs), compared with 16 for 400G-SR8

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: QSFP-DD
- PHY type: 400GBASE-SR4.2 (400G-BIDI)
- Standard: IEEE 802.3-2022 400GBASE-SR4.2
- Connector type: MPO-12 UPC
- Wavelength: 855 nm / 908 nm
- Cable type: OM3 / OM4 multimode fibre, 50.0 um core
- Max reach: 70m (OM3) / 100m (OM4)
- Modal bandwidth: 2000 MHzkm (OM3) / 4700 MHzkm (OM4)
- Fibre pairs: 4 (8 fibres total)
- Optical waves per fibre: 2
- Optical modulation: 50G PAM-4 per lane
- Tx power: -6 to +4 dBm per lane
- Rx power: -7.9 to +4 dBm per lane
- Operating modes: 400G-SR4.2, 4x100G-BIDI breakout, 4x100G-SR1.2 breakout
- Power consumption: 12 W max
- 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: Which fibre types and distances does it support?
A: It supports OM3 multimode fibre up to 70m and OM4 multimode fibre up to 100m, using an MPO-12 UPC connector.

Q: Can it be used for 4x100G breakout?
A: Yes. It can be configured through EOS for 4x100G-BIDI or 4x100G-SR1.2 breakout, and it interoperates with QSFP-100G-SRBD and 100G-SR1.2 QSFP modules at up to 100m over multimode fibre.

Q: What power does it draw?
A: It draws a maximum of 12W, powered from the host QSFP-DD port.

Q: Do I need to change my existing fibre plant to use it?
A: No. It uses the same MPO-12 UPC parallel multimode fibre as 40G-SR4 and 100G-SR4, so an existing link can be upgraded to 400GE without replacing the fibre.

Q: Is there an OSFP version?
A: Yes. The OSFP equivalent is OSFP-400G-SRBD1.

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