• Vibrant pink glossy Juniper QDD-400G-VR4 400G QSFP-DD sticker
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Juniper

Juniper QDD-400G-VR4 | 400G QSFP-DD | VR4 MMF | 850nm | 50m OM4 | MPO-12

QDD-400G-VR4

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Description

400G VR4 short-reach multimode transceiver optimized for very short links in dense data center rows. Parallel optics over MPO-12 simplify cabling while delivering up to 50 m on OM4 with hot-swappable QSFP-DD convenience.

Features

- Very short-reach 400G over multimode fiber
- MPO-12 connector for simplified parallel optics
- Optimized for top-of-rack to leaf aggregation
- Hot-swappable QSFP-DD form factor
- DOM/DDM for operational visibility
- Low-latency 8x50G PAM4 host signaling
- Commercial temperature range
- RoHS compliant construction

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

- Data rate: 400 Gb/s aggregate
- Form factor: QSFP-DD
- Optical standard: 400G VR4 (MSA)
- Wavelength: 850 nm
- Fiber type: Multimode (OM4/OM3)
- Reach: up to 50 m (OM4), shorter on OM3
- Connector: MPO-12 (female)
- Electrical interface: 8x 50G PAM4
- Digital diagnostics: DOM/DDM supported
- Operating temperature: 0 to 70 °C (commercial)
- Hot-swappable: Yes
- Compliance: RoHS

FAQs

Q: How does VR4 differ from SR8?
A: VR4 is optimized for very short reaches (e.g., 50 m on OM4) and uses an MPO-12 interface; SR8 supports 100 m on OM4 with MPO-16.

Q: What fiber and connector should I use?
A: OM4 MMF with an MPO-12 trunk or cassette is recommended for reliable performance.

Q: Is it hot-swappable?
A: Yes, it is hot-swappable in QSFP-DD compatible ports.

Q: Does it support digital diagnostics?
A: Yes, DOM/DDM is supported for monitoring optical power, temperature, and voltage.

Q: Is it standards-based?
A: VR4 follows MSA conventions for very short reach. Confirm compatibility with your platform’s transceiver matrix.

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