• 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-PLR4-Arista | 400G QSFP-DD Transceiver, Single-Mode, 10km, MPO-12

QDD-400G-PLR4-Arista

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Description

The Arista QDD-400G-PLR4 is a 400GBASE-PLR4 QSFP-DD optical transceiver designed for high-performance data center and enterprise network applications. It delivers 400 Gigabit Ethernet connectivity over single-mode fiber up to 10 km using four parallel 100G lanes at 1310 nm wavelength via an MPO-12/APC connector. The module supports 4x100G breakout mode for flexible deployment and interoperates seamlessly with 100G-LR QSFP28 modules.

Features

Hot-pluggable QSFP-DD form factor for easy installation and maintenance
- 400GBASE-PLR4 with four parallel 100 Gbps optical lanes
- PAM4 modulation technology for efficient high-speed transmission
- Up to 10 km transmission distance over single-mode fiber
- Four wavelengths (1271, 1291, 1311, 1331 nm) for parallel optics
- MPO-12/APC connector for multi-fiber connectivity
- Supports 4x100G breakout to 100GBASE-LR QSFP28 modules
- Digital Optical Monitoring (DOM) for real-time diagnostics
- Low power consumption design (max 12W)
- RoHS compliant and environmentally friendly
- QSFP-DD MSA and IEEE 802.3bs compliant
- Compatible with Arista 400G switching platforms
- Commercial temperature range (0°C to 70°C)
- Designed for data center, cloud, and enterprise applications

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
- Data Rate: 400 Gbps
- Interface: 400GBASE-PLR4 (4x100GBASE-LR)
- Wavelength: 1310 nm (4 lanes: 1271, 1291, 1311, 1331 nm)
- Connector: MPO-12/APC (MTP)
- Fiber Type: Single-Mode Fiber (SMF)
- Transmission Distance: Up to 10 km
- Modulation: PAM4 (56G per lane)
- Power Consumption: Max 12W
- Operating Temperature: 0°C to 70°C (commercial grade)
- Digital Diagnostics Monitoring (DOM): Supported
- Breakout Support: 4x100G-LR QSFP28
- Compliance: QSFP-DD MSA, IEEE 802.3bs, OIF 56G PAM4, 100G Lambda MSA

FAQs

Q: What network applications is the QDD-400G-PLR4 designed for?
A: This transceiver is ideal for 400 Gigabit Ethernet applications in data centers, cloud networks, high-performance computing environments, and enterprise campus backbones requiring long-reach single-mode fiber connectivity up to 10 km.

Q: Does the QDD-400G-PLR4 support breakout configurations?
A: Yes, the module supports 4x100G breakout mode, allowing you to connect to four separate 100GBASE-LR QSFP28 modules. This provides flexible migration paths and enables higher port density for 100G connections.

Q: What is the difference between PLR4 and LR4 400G transceivers?
A: PLR4 uses four parallel single-mode fibers via an MPO-12 connector with four wavelengths, while LR4 uses a duplex LC connector with four wavelengths multiplexed over a single fiber pair. Both support 10 km reach but have different cabling requirements.

Q: Is this transceiver compatible with other vendors' 400G equipment?
A: While specifically coded for Arista platforms, the QDD-400G-PLR4 follows industry-standard QSFP-DD MSA and IEEE 802.3bs specifications. It can interoperate with standards-compliant 100G-LR modules from other vendors in breakout scenarios.

Q: What type of fiber cable is required for this transceiver?
A: The QDD-400G-PLR4 requires OS2 single-mode fiber with MPO-12 (MTP) connectors using angled physical contact (APC) polish. Standard 12-fiber trunk cables are compatible for point-to-point or breakout applications.

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