The LINK-PP LQ-DW40-A04C is a high-performance 40G QSFP+ optical transceiver engineered for long-haul optical communication. Compliant with IEEE 802.3ba 40GBASE-EZR4 and QSFP MSA standards, it integrates four DWDM EML transmitters, APD photodetectors, and a duplex LC interface, operating over single-mode fiber with up to 11.2Gbps per channel bandwidth across 0°C to 70°C.
LINK-PP Part Number
LQ-DW40-A04C
Vendor Name
LINK-PP
Form Factor
QSFP+
Max Data Rate
44.8Gbps
Wavelength
1530.33nm, 1535.04nm, 1539.77nm, 1544.53nm
Max Cable Distance
100km
Connector
Duplex LC
Media
SMF
Transmitter Type
EML
Receiver Type
APD
Protocols
40G Ethernet IEEE802.3ba and 40GBASE-EZR4, MSA, QDR/DDR Infiniband
Operating Temperature Range
0°C to +70°C
Key Features of LINK-PP LQ-DW40-A04C 40G QSFP+
The LINK-PP LQ-DW40-A04C 40G QSFP+ features a 4-channel MUX/DEMUX design, delivering over 40Gbps aggregate bandwidth over single-mode fiber up to 100km. It incorporates high-sensitivity APD receivers, built-in digital optical monitoring (DOM), a single +3.3V power supply, and full compliance with IEEE 802.3ba standards.
LINK-PP LQ-DW40-A04C 40G QSFP+ Optical Module
Engineered for reliable optical communications, the LINK-PP LQ-DW40-A04C 40G QSFP+ optical module converts four 10Gbps electrical input channels into four multiplexed DWDM optical signals, delivering low-latency and high-bandwidth transmission across core optical networking systems.
LQ-DW40-A04C: 40G Connectivity for Metro Networks
The LQ-DW40-A04C provides robust 40G Ethernet connectivity tailored for metro networks, telecom transport, and long-haul data center interconnects (DCI), ensuring seamless rack-to-rack data routing with minimal latency, superior signal integrity, and exceptional power efficiency.
LQ-DW40-A04C Module with C-Band DWDM Technology for Fiber Efficiency
Utilizing advanced C-Band DWDM technology with 100GHz ITU grid spacing, the LQ-DW40-A04C module maximizes single-mode fiber efficiency, aggregating multiple data lanes into a single fiber pair to significantly expand existing network bandwidth without extra cabling.
LQ-DW40-A04C Module with 1530.33nm, 1535.04nm, 1539.77nm, 1544.53nm Wavelength
The LQ-DW40-A04C module operates precisely across four standard DWDM wavelengths—1530.33nm, 1535.04nm, 1539.77nm, and 1544.53nm. Integrated cooled EML lasers provide high wavelength accuracy, minimal spectral drift, and low chromatic dispersion penalty during extended reach transmission.
LQ-DW40-A04C Module Supporting 100km Transmission
Equipped with high-output EML transmitters and ultra-sensitive APD photo-detectors, the LQ-DW40-A04C module reliably supports up to 100km optical link reach over single-mode fiber (SMF), making it an optimal solution for 40GBASE-EZR4 long-span telecommunication architectures.
LQ-DW40-A04C Module with Duplex LC Interface
Featuring a standardized optical duplex LC receptacle, the LQ-DW40-A04C module ensures stable fiber connections, low insertion loss, and effortless patching into standard optical patch cords, facilitating quick integration into modern 40G high-density switching environments.
LQ-DW40-A04C Module with DOM for Real-Time Monitoring
Integrated with Digital Optical Monitoring (DOM) via a 2-wire serial interface, the LQ-DW40-A04C module allows administrators to monitor operating temperature, supply voltage, laser bias currents, Tx optical power, and Rx received optical power in real time.
LINK-PP LQ-DW40-A04C 40G QSFP+ Certification
The LINK-PP LQ-DW40-A04C 40G QSFP+ transceiver meets stringent global industry standards, guaranteeing full compliance with CE, FCC, UKCA, UL, and REACH regulations for premium safety and environmental sustainability.
Every LQ-DW40-A04C transceiver undergoes LINK-PP's comprehensive multi-stage testing protocol, verifying optical spectral integrity, electrical signal quality, continuous data integrity, and mechanical reliability prior to factory shipment.
LQ-DW40-A04C Quality Certifications
Backed by international CE, FCC, UKCA, UL, and REACH certifications, the LQ-DW40-A04C adheres to rigorous international electromagnetic compatibility, electrical safety, and hazardous material management guidelines worldwide.
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.
LQ-DW40-A04C Certified for Reliable Host-Device Compatibility
Conforming to the QSFP MSA specification, the LQ-DW40-A04C transceiver ensures verified plug-and-play interoperability and flawless host-device compatibility across leading enterprise switches, routers, and transport platforms.
Stringent automated quality validation ensures every LINK-PP LQ-DW40-A04C transceiver delivers outstanding optical stability, superior transmission accuracy, and dependable 40G network performance.
Optical Spectrum Test
Precision spectrum analyzers verify central wavelength accuracy, side-mode suppression ratio, and DWDM channel isolation.
Eye Pattern Test
Oscilloscope eye diagram testing confirms clean optical waveforms, high extinction ratios, and mask compliance.
Bit Error Rate Test
High-speed BERT evaluation validates error-free data packet transmission and receiver sensitivity under full load.
Temperature Test
Thermal cycling chambers validate stable transceiver operation across the full 0°C to 70°C commercial range.
Product Shipping for LINK-PP LQ-DW40-A04C 40G QSFP+
All LINK-PP LQ-DW40-A04C 40G QSFP+ modules are packaged securely and dispatched through reliable shipping channels to ensure safe, damage-free global delivery.
To deploy the LINK-PP LQ-DW40-A04C 40G QSFP+, insert the module into the QSFP+ switch port until the latch engages, connect the duplex LC single-mode fiber patch cord, and verify link activity via real-time DOM monitoring.
LQ-DW40-A04C 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 LQ-DW40-A04C 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, we provide aggressive tier-based discounts for batch deployments. For an order of 200 units, please contact our sales team directly, or use our wholesale promo codes at checkout to get significant volume savings. By
admin on
2026-05-26
A:
Absolutely. The LINK-PP LQ-DW40-A04C is fully OEM compatible and tested extensively on both Cisco and Arista platforms. You’ll get plug-and-play performance without any vendor lock-in errors or compatibility warnings. By
admin on
2026-04-26
A:
This specific LQ-DW40-A04C model operates at the standard commercial temperature (0°C to 70°C), which is suitable for most indoor and climate-controlled outdoor cabinets. However, we do manufacture custom industrial-grade versions upon request for extreme environments. By
admin on
2026-04-20
A:
You will need standard OS2 Single-Mode Fiber (SMF) to achieve the full 100km extended reach. The module uses a standard Duplex LC connector, making it 100% compatible with your existing standard LC optical patch cords. By
admin on
2026-04-05
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495595
464094
S***z
Taiwan, Province of China
Verified
Purchase
5 .0
2026-06-15
Used these 40G QSFP+ C-Band DWDM transceivers for our campus fiber network upgrade. The duplex LC SMF handled 80km without extra amplification. Great OEM compatibility with our Mellanox switches. Highly recommended!
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495595
464080
J***t
Italy
Verified
Purchase
5 .0
2026-06-14
Tested for base station backhaul in a temperature-controlled outdoor cabinet (0-70°C). Stable 40GBASE-EZR4 performance and the DOM interface is a lifesaver for remote troubleshooting. Excellent alternative to overpriced native modules.
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495595
464092
L***n
Denmark
Verified
Purchase
5 .0
2026-04-30
Hooked up a massive batch deployment in our data center interconnects. Zero packet loss over 100km single-mode fiber. Plug and play with our Dell and H3C core switches. Superior DWDM aggregation!
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character.
495595
464078
D***a
Mexico
Verified
Purchase
5 .0
2025-12-05
Deployed these LQ-DW40-A04C modules for a 90km DCI link. The EML/APD combo and DOM monitoring provide excellent signal integrity. Fully compatible with our Juniper and Arista mixed environment. Solid 40G throughput!
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