The LINK-PP LQD-M31400-LR4C is a high-performance 400G QSFP-DD LR4 optical transceiver designed for single-mode fiber. Featuring an advanced EML laser and PIN photodetector, this IEEE 802.3cu compliant module utilizes 4x100GBASE-LR1 and 53.125GBd PAM4 modulation. Operating at a maximum power consumption of 9W, the LQD-M31400-LR4C delivers exceptional bandwidth for modern enterprise data centers.
As a commercial-grade 400G QSFP-DD optical module, the LQD-M31400-LR4C operates reliably within a 0℃ to 70℃ temperature range. Its compact double-density form factor maximizes faceplate density, making it an ideal hardware choice for upgrading hyperscale networking architectures.
LQD-M31400-LR4C: 400G Connectivity for Infiniband Interconnect
Meeting stringent bandwidth demands, the LQD-M31400-LR4C excels in Infiniband interconnect applications. By delivering lossless, high-throughput 400Gbps connections, this transceiver eliminates network bottlenecks, perfectly supporting AI clusters, high-performance computing (HPC), and intensive data center interconnect workloads.
LQD-M31400-LR4C Module with 1310nm Wavelength
Utilizing a 1310nm central wavelength, the LQD-M31400-LR4C ensures minimal optical dispersion over single-mode fiber links. Driven by a premium EML laser, this 1310nm configuration maintains superior signal integrity and low relative intensity noise for stable long-reach communication.
Designed for long-reach networking, the LQD-M31400-LR4C supports seamless data transmission up to 10km over SMF. This extended 10km operating distance provides data centers with flexible, reliable cross-campus routing and efficient long-haul enterprise breakout connection capabilities.
LQD-M31400-LR4C Module with MPO-12/APC Interface
Equipped with a high-precision MPO-12/APC optical connector, the LQD-M31400-LR4C ensures low insertion loss and excellent return loss tolerance. This multi-fiber MPO-12 interface allows fast, secure physical layer patching for 4x100G parallel transmission deployments.
LQD-M31400-LR4C Module with DOM for Real-Time Monitoring
Featuring a built-in 2-wire serial interface, the LQD-M31400-LR4C fully supports digital optical monitoring (DOM) functionalities. Network administrators can easily track real-time diagnostics including module temperature, supply voltage, and precise laser launch power.
Every LINK-PP LQD-M31400-LR4C 400G QSFP-DD transceiver undergoes strict validation to guarantee premium safety and environmental compliance, ensuring secure integration into global enterprise networking infrastructures.
The LQD-M31400-LR4C undergoes a comprehensive quality testing program, measuring critical parameters like transmitter power excursion and receiver sensitivity to ensure zero-defect commercial operations and flawless optical performance.
LQD-M31400-LR4C Quality Certifications
Demonstrating exceptional manufacturing standards, the LQD-M31400-LR4C holds key international quality certifications including CE, FCC, UKCA, UL, and REACH, fully meeting RoHS compliance for environmentally sustainable data centers.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
LQD-M31400-LR4C Certified for Reliable Host-Device Compatibility
Strictly compliant with QSFP-DD CMIS Rev 5.0 protocols, the LQD-M31400-LR4C is certified for broad host-device compatibility, guaranteeing seamless interoperability with major OEM switches and enterprise networking equipment.
Our advanced laboratory executes rigorous testing methodologies to guarantee the LQD-M31400-LR4C delivers outstanding performance and consistent network reliability under heavy data loads.
Optical Spectrum Test
Evaluates the 1311nm central wavelength stability and side-mode suppression ratio for precise transmission.
Eye Pattern Test
Validates PAM4 signal integrity, checking TDECQ parameters to ensure a clear optical eye opening.
Bit Error Rate Test
Simulates massive data throughput to confirm the LQD-M31400-LR4C maintains an ultra-low bit error rate.
Temperature Test
Verifies stable transceiver operation across the commercial case temperature range of 0℃ to 70℃.
Product Shipping for LINK-PP LQD-M31400-LR4C 400G QSFP-DD
We provide secure and efficient shipping services for the LINK-PP LQD-M31400-LR4C 400G QSFP-DD, ensuring your optical transceivers arrive safely and completely undamaged.
Anti-Static Protective Packaging
Each LQD-M31400-LR4C module uses premium ESD-safe bags to prevent harmful electrostatic damage.
Integrating this next-generation optical module into your data center architecture is incredibly straightforward. Simply insert the hot-pluggable QSFP-DD transceiver into any standard 400G switch port, connect your single-mode LC fiber cable, and instantly experience extreme-speed 400-Gigabit data transmission.
LQD-M31400-LR4C Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable LQD-M31400-LR4C modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
Yes! It is fully compliant with QSFP-DD MSA HW Rev 5.1, CMIS 5.0, IEEE 802.3bs, and 802.3cu protocols, ensuring seamless integration and legal compliance in strict enterprise environments. By
admin on
2026-08-07
A:
Absolutely! Our transceivers undergo rigorous multi-brand switch compatibility tests to ensure 100% interoperability with Arista, Juniper, Cisco, Dell, and other major OEM brands in hybrid data centers. By
admin on
2026-06-17
A:
This specific LQD-M31400-LR4C is designed for 0-70°C commercial/indoor deployments. However, if your outdoor cabinets lack climate control, we can customize an industrial-grade (-40°C to 85°C) 400G solution tailored for rugged base station edge networks. Just drop us an inquiry! By
admin on
2026-05-08
A:
This exact model relies on a standard MPO-12/APC connector to achieve the 10km SMF transmission. If your patching requires LC duplex connections, you can use our MPO to LC breakout cables, or we can recommend a different 400G transceiver variant to match your existing fiber plant. By
admin on
2026-04-28
A:
It matches OEM performance flawlessly. Built with premium EML transmitters and PIN receivers, it offers the exact same 400G throughput, low latency, and DDM/DOM accuracy, saving your IT budget while guaranteeing enterprise-grade reliability. By
admin on
2026-04-24
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495120
463684
M***z
Japan
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Purchase
5 .0
2026-07-31
Testing this 1310nm SMF module for a massive base station backhaul project. The DDM/DOM diagnostics are spot on, and receiver sensitivity from the PIN diode exceeds expectations. Great OEM compatible alternative!
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495120
463672
S***n
Bolivia
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5 .0
2026-07-21
Did a massive rollout of these 400G-PLR4 QSFP-DD transceivers for campus fiber network. The 8x50G PAM4 signal over 10km MPO-12 SMF is incredible. Mellanox switches recognized them instantly via CMIS 5.0.
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495120
463681
E***s
Argentina
Verified
Purchase
5 .0
2025-12-27
Bulk deployed these for our multi-site data center interconnect. Validated across Cisco, HPE Aruba, and H3C gear without a single link flap. The MPO-12/APC interface and 10km transmission completely solved bottlenecks!
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