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LQD-CW400-FR4C 400g qsfp-dd 1310nm 2km duplex lc dom smf optical transceiver module
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LINK-PP LQD-CW400-FR4C 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module

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Product summary

Product
LINK-PP LQD-CW400-FR4C 400G QSFP-DD 1310nm 2km Duplex LC DOM SMF Optical Transceiver Module
SKU
214656
P/N
LQD-CW400-FR4C
Price
$ 618
Stock
120 in Stock
Sold
990
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
For Order Over $3000 Get $50.00 Off , Code: Linkpp50
For Order Over $5000 Get $100.00 Off , Code: Linkpp100
New Users: $10 Coupon for Orders , Code: linkpp2610
49 Reviews
3 Questions
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Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
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$ 618
10
$ 599.46
100
$ 580.92
1000
$ 562.38
3000
$ 543.84
Manufacture: LINK-PP P/N: LQD-CW400-FR4C SKU: 214656
Shipping:
Free Shipping
to United States via FedEx
Estimated delivery time : 3 - 10 days.
5-Year Warranty 30-Day Returns 30-Day Exchange
Warranty
  • Providing industry-leading 5-year warranty.
  • Read the table for details of all products' warranty.
Returns & Exchange
  • Refunds will be received about 5 business days after the receipt of returned items.
  • Items in stock for replacement can be shipped within 1 business day.
  • Read the full return policy for details.
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LINK-PP LQD-CW400-FR4C 400G QSFP-DD Specifications

The LINK-PP LQD-CW400-FR4C is a commercial-grade 400G QSFP-DD optical transceiver engineered for high-density networking. Compliant with 400GBASE-FR4 standards, it utilizes 8x53.125Gb/s PAM4 electrical lanes and 4x106.25Gb/s optical channels. It features an integrated EML laser, a PIN receiver, and a duplex LC connector, delivering stable 400Gbps aggregation over single-mode fiber with a maximum power consumption under 10W.

LINK-PP Part Number: LQD-CW400-FR4C Vendor Name LINK-PP
Form Factor QSFP-DD Max Data Rate 400Gbps
Connector Duplex LC Media SMF
Wavelength 1271nm, 1291nm, 1311nm, 1331nm Max Cable Distance 2km
Transmitter Type CWDM EML Receiver Type

PIN

Max Power Consumption 9.5W Protocols IEEE 802.3bs, QSFP-DD MSA
DDM/DOM Supported Operating Temperature range

0°C to +70°C

Key Features of LINK-PP LQD-CW400-FR4C 400G QSFP-DD

This hot-pluggable QSFP-DD transceiver offers high port density and low power consumption for modern networks. Leveraging advanced 4-level pulse amplitude modulation, it integrates digital optical monitoring for comprehensive performance tracking. It provides cost-effective, high-bandwidth interconnectivity with broad third-party host compatibility.

LINK-PP LQD-CW400-FR4C 400G QSFP-DD Optical Module

The LINK-PP LQD-CW400-FR4C optical module offers a reliable, plug-and-play solution for upgrading hardware to 400G. Designed for robust data aggregation, it minimizes footprint while maintaining superior thermal dissipation in high-density switch environments.

LQD-CW400-FR4C: 400G Connectivity for Cloud Data Centers

Tailored for next-generation cloud infrastructure, the LQD-CW400-FR4C delivers hyperscale bandwidth to handle massive traffic demands. It bridges spine-and-leaf switches efficiently, ensuring ultra-low latency and consistent throughput required for modern AI and enterprise cloud environments.

LQD-CW400-FR4C Module with CWDM Technology for Fiber Efficiency

By incorporating integrated Coarse Wavelength Division Multiplexing technology, this module multiplexes four distinct channels onto a single fiber pair. This architecture dramatically reduces cabling complexity and optimizes existing fiber infrastructure capital expenditures.

LQD-CW400-FR4C Module with 1271nm, 1291nm, 1311nm, 1331nm Wavelength

Operating on four precise CWDM grid wavelengths of 1271nm, 1291nm, 1311nm, and 1331nm, the module minimizes optical crosstalk. This specific wavelength configuration guarantees clean grid spacing and optimized signal integrity over single-mode links.

LQD-CW400-FR4C Module Supporting 2km Transmission

Engineered for localized reach, this transceiver supports error-free link distances up to 2km using standard G.652 single-mode fiber. It serves as the ideal reach-optimized solution for intra-datacenter interconnects and campus backbone wiring.

LQD-CW400-FR4C Module with Duplex LC Interface

Featuring an industry-standard duplex LC optical interface, this module enables secure, tactile fiber patching. The standard LC connector format ensures seamless integration with legacy patch panels, clean mating interfaces, and low insertion loss.

LQD-CW400-FR4C Module with DOM for Real-Time Monitoring

Equipped with built-in Digital Optical Monitoring via the CMIS interface, network administrators can track diagnostics in real time. The module continuously reports internal temperature, supply voltage, laser bias current, and received optical power levels.


LINK-PP LQD-CW400-FR4C 400G QSFP-DD Certification

This transceiver holds complete international regulatory approvals, satisfying rigorous global standards for electronic products. It complies fully with standard multi-source agreements, ensuring safe, law-compliant deployment across global network infrastructures.

Optical Transceivers Testing

LINK-PP subjects every single transceiver to a comprehensive multi-stage validation pipeline. Technicians rigorously verify every parameter, ensuring that each module leaves the factory performing at peak physical and optical excellence.

LQD-CW400-FR4C Quality Certifications

Manufactured under strict ISO9001 quality management guidelines, this module holds CE, FCC, and RoHS environmental certifications. These credentials guarantee toxic-free materials, electromagnetic safety compliance, and long-term operating reliability.

LQD-CW400-FR4C Certified for Reliable Host-Device Compatibility

Extensive hardware interoperability matrices certify this transceiver for seamless use with major switch and router vendors. It guarantees immediate host recognition, eliminating system faults or communication lockouts upon installation.


Rigorous Testing Ensures Reliable QSFP-DD Performance

Every LQD-CW400-FR4C module undergoes strict parametric validation. Our comprehensive testing protocol ensures optimal data transmission, mechanical integrity, and absolute reliability under maximum network workloads.

Optical

Optical Spectrum Test

Precision spectrum analysis verifies correct CWDM central wavelengths and side-mode suppression ratios.

Optical

Eye Pattern Test

PAM4 eye diagram testing ensures clean optical signals, low jitter, and excellent signal-to-noise ratios.

Optical

Bit Error Rate Test

Strict PRBS testing guarantees error-free data throughput, fully satisfying mandatory host KP4 FEC benchmarks.

Optical

Temperature Test

Thermal chamber cycling validates commercial-grade stability across variable operating environments from 0°C to 70°C.


Product Shipping for LINK-PP LQD-CW400-FR4C 400G QSFP-DD

We implement specialized logistic workflows and standardized defensive packaging for all transit. Your modules arrive safely, secured against environmental hazards and transportation stresses, ready for deployment.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Each module is sealed inside a premium ESD-safe anti-static blister package.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Heavy-duty cushioned outer boxes shield the optics from accidental drops and vibrations.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Streamlined warehousing ensures swift verification, rapid packaging, and prompt courier handover.

Global Logistics and International Delivery

Global Logistics and International Delivery

Partnering with leading express carriers guarantees rapid, tracked delivery to any worldwide destination.

LINK-PP LQD-CW400-FR4C 400G QSFP-DD Usage Demonstration

This application showcase demonstrates the simple hot-swapping installation of the transceiver into standard high-density 400G enterprise switches. Watch how the host system instantly discovers the module, initiates the DOM link diagnostics, and establishes a stable 2km fiber link.

LQD-CW400-FR4C 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

Pre-Sales Technical Consultation

Professional technical guidance to help customers select the most suitable LQD-CW400-FR4C modules based on network architecture and application requirements.

Compatibility Verification Support

Compatibility Verification Support

Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.

Deployment & Installation Assistance

Deployment & Installation Assistance

Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.

Long-Term Technical Assurance

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.

LINK-PP LQD-CW400-FR4C 400G QSFP-DD After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15 days

15-day no-reason return and refund

Free maintenance or replacement

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free maintenance

 Free repair services for manufacturing defects throughout the warranty period

Limitations

Warranty exclusions and conditions apply

Model Comparison Table

LINK-PP

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L***s
Russian Federation
Verified Purchase
5 .0
2026-04-18
Excellent price for 400GBASE-FR4 transceiver modules.
K***z
Italy
Verified Purchase
5 .0
2026-04-11
Evaluated this 400G optical transceiver module against expensive OEM brands for our Toronto high-speed NAS storage backend. The 1271-1331nm multiplexing is efficient, and it handles our continuous 400Gbps traffic without thermal throttling.
E***n
Germany
Verified Purchase
5 .0
2026-04-10
Reliable 400G connectivity for indoor rack patching.
D***l
Ireland
Verified Purchase
5 .0
2026-04-01
Used in our Munich server room. 400G QSFP-DD form factor fit snugly without any issues.
C***e
Philippines
Verified Purchase
5 .0
2026-03-19
2km SMF transmission works exactly as specified.
R***t
Ukraine
Verified Purchase
5 .0
2026-02-14
Seamless integration with our Juniper gear. Duplex LC interface makes patching SMF super easy.
M***s
Indonesia
Verified Purchase
5 .0
2026-01-23
Plug and play on Dell 400G switches!
L***z
Portugal
Verified Purchase
5 .0
2026-01-03
Tested these 400G QSFP-DD 1310nm transceivers for high-density 400Gbps aggregation in our Texas data center. The 9.5W power draw is efficient, and the 4x106.25Gb/s PAM4 lanes deliver stable throughput. Outstanding B2B value.
D***z
Finland
Verified Purchase
5 .0
2026-01-03
Perfect for enterprise cloud 400G interconnects. ☁️
P***t
Viet Nam
Verified Purchase
5 .0
2025-11-24
EML laser performance is superb over 2km. ✨
D***h
Russian Federation
Verified Purchase
4 .0
2025-11-10
Packaging was slightly dented upon arrival in Berlin. Modules passed Cisco switch DOM tests perfectly.
K***l
Colombia
Verified Purchase
4 .0
2025-11-06
Delivery took an extra day to our London hub, but the 400G QSFP-DD works flawlessly.
D***n
Canada
Verified Purchase
5 .0
2025-10-09
Bulk ordered these for our UK cloud deployment. DOM output matches network monitoring tools perfectly.
S***n
Canada
Verified Purchase
5 .0
2025-09-13
Reliable DOM tracking on these 400G SMF optics.
M***r
Republic of Korea
Verified Purchase
5 .0
2025-08-15
Exact QSFP-DD MSA specs, zero compatibility issues.
S***e
Austria
Verified Purchase
5 .0
2025-08-08
Solid 400GBASE-FR4 module for campus fiber network.
M***r
Malaysia
Verified Purchase
5 .0
2025-06-29
Flawless traffic over 1.2km single-mode fiber. ⚡
S***z
Norway
Verified Purchase
5 .0
2025-05-11
Great Cisco compatible 400G QSFP-DD. Temperatures stay well within 0-70°C under heavy datacenter load.
D***s
Germany
Verified Purchase
5 .0
2025-05-10
Deployed these LINK-PP 400G FR4 optics for our Chicago spine-leaf architecture. Flawless Arista compatibility and the CWDM EML transmitter keeps signal integrity solid over 1.5km SMF. DOM monitoring is highly accurate!
C***n
Thailand
Verified Purchase
5 .0
2025-05-08
We procured a batch for our European campus fiber network upgrade. The IEEE 802.3bs compliance ensures smooth interoperability with Mellanox adapters. LC connectors feel premium, and 2km reach covers our inter-building links perfectly.
S***z
Chile
Verified Purchase
5 .0
2025-04-23
Great compatibility with HPE Aruba switches. The PIN receiver sensitivity is much better than expected!
L***z
Ireland
Verified Purchase
5 .0
2025-04-02
Quick bulk deployment for our NY server racks.
C***n
India
Verified Purchase
5 .0
2025-03-06
Good alternative to OEM. The 400G CWDM4 optics run cool in our climate-controlled cabinets.
N***z
Ukraine
Verified Purchase
5 .0
2025-02-21
Highly recommend this CWDM4 QSFP-DD for base station backhaul. 1310nm wavelength is rock solid.
P***z
Bolivia
Verified Purchase
5 .0
2025-02-17
Replaced faulty OEM optics with this LINK-PP FR4C. Zero packet loss on our edge switches.
J***e
United States
Verified Purchase
5 .0
2023-10-13
Goods as advertised. Shipping great. Recommended!
T***t
Spain
Verified Purchase
5 .0
2023-10-01
Always professional service and great pricing. packages often received earlier than promised.
J***d
United States
Verified Purchase
5 .0
2023-07-31
Item came on time, as described. No issues with the seller.
A***o
Poland
Verified Purchase
5 .0
2023-07-13
Have always gotten prompt and courteous service with great pricing.
T***g
Israel
Verified Purchase
5 .0
2023-04-13
it’s always a pleasure to do business with LINK-PP.
T***a
United States
Verified Purchase
5 .0
2023-03-29
Found what I needed at a good price. Ordered it and received it in four days.
M***n
Poland
Verified Purchase
5 .0
2023-01-29
My first experience with you guys. Was very pleased. Prices were excellent. I was REALLY happy with the customer service. Fast and reliable. I'll shop at the site again definitely.
A***k
Finland
Verified Purchase
4 .0
2022-12-16
Easy website, Fast service!
E***l
Italy
Verified Purchase
5 .0
2022-12-07
Always been reliable.
A***l
Macao
Verified Purchase
5 .0
2022-11-05
Fast shipping, good service, high quality.
r***g
Netherlands
Verified Purchase
5 .0
2022-10-14
Yes you can get this item for much cheaper elsewhere but who knows what kind of quality you\'re gonna be getting. And replacing that part and dealing network problems from low quality parts will cost you much more in the long run.
N***e
Bulgaria
Verified Purchase
5 .0
2022-08-15
I received the order very quickly once the payment was done.. Thanks
T***g
Romania
Verified Purchase
5 .0
2022-07-16
always happy with quality of merchandise, as well as Fast delivery. wide selection of goods
J***n
Hong Kong
Verified Purchase
5 .0
2022-06-19
Price is very affordable.
G***a
United States
Verified Purchase
5 .0
2022-05-28
Item arrived much quicker than I expected. Thank you.
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