The LINK-PP LQ-CW40-ER4C is a high-performance 40G QSFP+ transceiver designed for demanding optical communication applications. Fully compliant with the 40GBASE-ER4 standard, this optical module delivers an aggregate bandwidth exceeding 40Gbps. It operates efficiently over single-mode fiber, making it an optimal choice for reliable, high-speed data center interconnections and long-haul networking.
LINK-PP Part Number
LQ-CW40-ER4C
Vendor Name
LINK-PP
Form Factor
QSFP+
Max Data Rate
40Gbps
Wavelength
1271nm, 1291nm, 1311nm, 1331nm
Max Cable Distance
40km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
APD
TX Power
-2.7~4.5dBm
Receiver Sensitivity
<-21.2dBm
Powerbudget
18.5dB
Receiver Overload
-4.5dBm
Power Consumption
≤3.3W
Operating Temperature Range
0°C to +70°C
Host FEC
Supported
Protocols
OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant
Key Features of LINK-PP LQ-CW40-ER4C 40G QSFP+
Adhering to the strict QSFP MSA compliant standards, this hot-pluggable 40G Ethernet transceiver features exceptional stability and maximum low power consumption under 3.5W. It utilizes premium APD photo-detectors and integrated digital diagnostic functions to ensure robust performance across commercial temperature environments.
LINK-PP LQ-CW40-ER4C 40G QSFP+ Optical Module
Engineered as a premium 40G fiber optic module, it seamlessly supports IEEE 802.3ba protocols. This highly integrated component provides network administrators with a dependable solution for scaling bandwidth in modern telecommunication infrastructures.
LQ-CW40-ER4C: 40G Connectivity for Metro Networks
Designed specifically for metro network links, this transceiver facilitates seamless communication between backbone switches and core routers. It provides the essential long-reach connectivity required to bridge vast geographic distances within complex urban data infrastructures.
LQ-CW40-ER4C Module with CWDM4 Technology for Fiber Efficiency
By leveraging advanced CWDM multiplexing technology, the device seamlessly combines four distinct channels into a single optical transmission path. This innovative design significantly maximizes existing fiber bandwidth, reducing infrastructure deployment costs for network operators.
LQ-CW40-ER4C Module with 1271nm, 1291nm, 1311nm, 1331nm Wavelength
The transmitter incorporates a highly reliable DFB laser operating across the 1271nm, 1291nm, 1311nm, and 1331nm optical channels. These specific central wavelengths strictly follow the ITU-T G694.2 grid, ensuring minimal optical dispersion during transmission.
LQ-CW40-ER4C Module Supporting 40km Transmission
Built to overcome distance limitations, the integrated APD receiver delivers exceptional sensitivity. This empowers the module to achieve a reliable 40km reach over single-mode fiber (SMF), perfectly serving long-haul enterprise and carrier-grade network expansions.
LQ-CW40-ER4C Module with Duplex LC Interface
Featuring a standard LC duplex connector, this transceiver ensures effortless physical integration with existing cabling systems. The precise optical interface guarantees secure patch cord compatibility, minimizing insertion loss and maximizing the overall link integrity.
LQ-CW40-ER4C Module with DOM for Real-Time Monitoring
Equipped with advanced Digital Diagnostic Monitoring (DOM), the device allows administrators to track critical parameters through a 2-wire serial interface. This real-time monitoring capability ensures proactive maintenance by checking temperature, voltage, and optical power levels.
LINK-PP LQ-CW40-ER4C 40G QSFP+ Certification
Meeting strict industry standards is our top manufacturing priority. This transceiver features comprehensive global regulatory compliance, guaranteeing completely secure operation across diverse global telecommunication environments.
Every single unit undergoes an exhaustive factory testing process. Our strict quality assurance protocols guarantee that each component performs flawlessly under continuous, heavy-load networking conditions.
LQ-CW40-ER4C Quality Certifications
Demonstrating superior manufacturing excellence, this networking component is fully CE, FCC, UKCA, UL, and REACH certified. Furthermore, it operates as a totally RoHS compliant part.
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-CW40-ER4C Certified for Reliable Host-Device Compatibility
Engineered strictly to MSA standards, the module promises seamless interoperability. It is rigorously certified to ensure perfect plug-and-play functionality with all major switch brands and telecom equipment.
Through comprehensive performance verification, our dedicated optical testing procedures ensure that every shipped unit meets the highest industry benchmarks for stability and speed.
Optical Spectrum Test
Validating precise wavelength accuracy and continuous laser precision across all integrated optical channels.
Eye Pattern Test
Evaluating core signal integrity to guarantee strict data dependent input jitter compliance.
Bit Error Rate Test
Confirming maximum transmission reliability to ensure virtually zero packet loss over extensive fiber runs.
Temperature Test
Verifying consistent thermal stability throughout the 0°C to 70°C commercial temperature range environment.
Product Shipping for LINK-PP LQ-CW40-ER4C 40G QSFP+
We maintain a highly optimized global supply chain to ensure the secure delivery of your networking equipment, prioritizing both speed and product safety.
Experience the effortless hot-swappable installation process tailored for fast data center deployment. Simply insert the module into a compatible router port, connect your SMF patch cord, and instantly upgrade your network to high-capacity 40G optical throughput.
LQ-CW40-ER4C 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-CW40-ER4C 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.
No special adapters are needed! The module features an internal CWDM multiplexer that routes the four wavelengths (1271nm, 1291nm, 1311nm, 1331nm) through a standard Duplex LC interface. It perfectly matches your existing OS2 SMF cabling for instant, plug-and-play 40km transmission. by LINK-PP Technical Support
Absolutely. Our LQ-CW40-ER4C is strictly MSA compliant and undergoes rigorous OEM compatibility testing. It works flawlessly across mixed Cisco, Juniper, and Arista deployments without triggering any "unsupported transceiver" errors on your console. by LINK-PP Technical Support
Yes, it is fully compliant with IEEE 802.3ba 40GBASE-ER4 and OTN OTU3 protocols. Furthermore, it meets FDA/CDRH and IEC-60825 global standards for laser safety, making it completely certified for high-demand data center and carrier network integrations. by LINK-PP Technical Support
Yes, we provide tiered B2B pricing for large-scale enterprise and telecom deployments. For batch orders exceeding 500 units, you will receive a significantly reduced unit cost. Please contact our sales engineering team directly for a customized quote. by LINK-PP Technical Support
Please write comments with more than three
character.
472716
632375
A***e
Argentina
Verified Purchase
4.0
2026-10-09
Four stars because three point three watts still warms a dense shelf a touch, but on the bench it stayed under spec and the forty gig eye was clean, no issues.
Please write comments with more than three
character.
472716
632372
D***d
Mexico
Verified Purchase
5.0
2026-08-10
Forty kilometres on single mode is the reach that let us collapse two buildings onto one ring, and the ER4 has held that span since the day it went in. The DFB and APD pairing keeps the budget at eighteen and a half dB, so a dirty patch panel here and there never dropped the link. Six months on, the numbers read the same as day one, and it has caused no trouble at all.
United States · English · USD
