The LINK-PP LQ-BL918540-SR2C is a high-performance 40G QSFP+ BiDi optical transceiver engineered for short-reach Ethernet applications. Operating at an max data rate of 44.8Gbps over duplex LC multimode fiber (MMF), it integrates VCSEL lasers and PIN receivers with low power consumption under 3.5W, fully complying with IEEE 802.3ba XLPPI and QSFP+ SFF-8436 MSA specifications.
LINK-PP Part Number
LQ-BL918540-SR2C
Vendor Name
LINK-PP
Form Factor
QSFP+
Max Data Rate
44.8Gbps
Wavelength
910nm-TX/850nm-RX
Max Cable Distance
150m@OM4/100m@OM3
Connector
Duplex LC
Media
MMF
Transmitter Type
VCSEL
Receiver Type
PIN
DDM/DOM
Supported
Operating Temperature Range
0°C to +70°C
Protocols
IEEE 802.3 40GBASE-SR4, QSFP+ MSA, SFF-8436
Warranty
5 Years
Key Features of LINK-PP LQ-BL918540-SR2C 40G BiDi QSFP+
The LINK-PP LQ-BL918540-SR2C features a hot-pluggable QSFP+ form factor, bidirectional transmission over duplex LC multimode fiber, integrated 4:2 Gearbox CDR technology, and a 0°C to 70°C commercial operating temperature range for seamless, cost-effective data center 40GbE network upgrades.
The LINK-PP LQ-BL918540-SR2C optical module multiplexes four 10G electrical lanes into two 20Gbps optical channels, delivering an aggregate 40Gbps bandwidth for high-density enterprise switching and high-speed aggregation uplinks.
LQ-BL918540-SR2C: 40G Connectivity for Enterprise Networks
Designed for enterprise networks, the LQ-BL918540-SR2C provides ultra-reliable 40GBASE Ethernet connectivity, significantly boosting backbone throughput and reducing latency across core switches, routers, and high-performance server clusters.
LQ-BL918540-SR2C Module with 910nm-TX and 850nm-RX Wavelength
The LQ-BL918540-SR2C utilizes a 910nm-TX and 850nm-RX wavelength configuration, pairing perfectly with complementary 850nm-TX transceivers to achieve efficient bidirectional optical data transmission across a single LC fiber pair.
Supporting link lengths up to 100 meters on OM3 MMF and 150 meters on OM4 multimode fiber, the LQ-BL918540-SR2C transceiver is an ideal solution for spine-and-leaf intra-data center interconnections.
LQ-BL918540-SR2C Module with Duplex LC Interface
Featuring a standard duplex LC interface, the LQ-BL918540-SR2C enables direct migration from 10G to 40G Ethernet, completely eliminating costly fiber re-cabling by reusing existing LC duplex structured patch cabling.
LQ-BL918540-SR2C Module with DOM for Real-Time Monitoring
The LQ-BL918540-SR2C provides comprehensive I2C status reporting and pin-level interrupt controls, supporting reliable host system management and ensuring steady, uninterrupted operational visibility across enterprise data networks.
LINK-PP LQ-BL918540-SR2C 40G QSFP+ Certification
The LINK-PP LQ-BL918540-SR2C complies strictly with international industry standards, holding comprehensive safety and environmental quality certifications to ensure dependable performance in global network deployments.
Each LQ-BL918540-SR2C module undergoes rigorous end-to-end electrical, optical, and mechanical inspection procedures to guarantee superior transmission stability, long-term durability, and zero-defect product reliability.
LQ-BL918540-SR2C Quality Certifications
The LQ-BL918540-SR2C is fully certified under CE, FCC, UKCA, UL, RoHS, and REACH directives, meeting stringent environmental protection and electromagnetic compatibility requirements.
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-BL918540-SR2C Certified for Reliable Host-Device Compatibility
Engineered to SFF-8436 MSA specifications, the LQ-BL918540-SR2C guarantees seamless multi-vendor compatibility across major enterprise Ethernet switches, high-end routers, and server network interface cards.
Every LQ-BL918540-SR2C transceiver undergoes comprehensive automated laboratory testing to ensure flawless signal transmission and exceptional reliability.
Optical Spectrum Test
Spectral verification ensures strict central wavelength compliance and high side-mode suppression performance.
Eye Pattern Test
Automated eye diagram analysis verifies fast rise/fall times and optimal signal integrity.
Bit Error Rate Test
Extensive BER testing confirms zero packet loss and error-free 40Gbps high-throughput transmission.
Temperature Test
Thermal chamber cycling validates uninterrupted operation across the 0°C to 70°C commercial range.
Product Shipping for LINK-PP LQ-BL918540-SR2C 40G QSFP+
All LINK-PP LQ-BL918540-SR2C modules are securely packaged and rapidly dispatched via trusted international carriers for safe global delivery.
Anti-Static Protective Packaging
Individually packed in ESD-shielded blister packaging to prevent electrostatic damage during storage.
The LINK-PP LQ-BL918540-SR2C easily inserts into any standard QSFP+ host cage. Connect a duplex LC OM3/OM4 fiber cable to instantly establish stable, high-speed 40G BiDi Ethernet communication without manual device configuration.
LQ-BL918540-SR2C 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-BL918540-SR2C 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:
You do not need to install MPO trunks. That is the major architectural benefit of 40G BiDi technology. By multiplexing two 20Gbps wavelength channels (850nm and 910nm) over a single duplex fiber, the module uses the standard duplex LC interface. You can reuse your existing 10G OM3 cabling for links up to 100 meters, or OM4 multimode fiber for links up to 150 meters, enabling an instant 40G upgrade with zero re-cabling cost. By
admin
A:
This standard module operates within commercial operating temperatures of 0°C to 70°C (32°F to 158°F). For unconditioned outdoor edge cabinets, roadside enclosures, or non-HVAC industrial facilities, LINK-PP provides an industrial-grade wide-temperature version rated from -40°C to +85°C (-40°F to 185°F). Please reach out to our engineering support team before checkout so we can configure the industrial hardened variant for your project. By
admin
A:
Yes. Each LINK-PP 40G QSFP+ BiDi module (LQ-BL918540-SR2C) is programmed and tested for full EEPROM and MSA compatibility with your target platforms, including Cisco (as a direct replacement for QSFP-40G-SR-BD), Arista, Juniper, Dell, and HPE Aruba. When placing your order, specify your switch models or requested vendor coding, and we will custom-code the modules so they are recognized natively with complete DOM/DDM telemetry and zero CLI lockouts. By
admin
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495620
464664
L***n
Portugal
Verified
Purchase
5 .0
2026-05-12
Deployed 48 units between Dell PowerSwitch core and Juniper distribution frames. Zero link flap over 120m OM4 lines, MSA compliance is spot on, and power consumption is remarkably low per port.
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495620
464665
M***l
Ghana
Verified
Purchase
5 .0
2026-04-08
Replaced Cisco QSFP-40G-SR-BD across our data center spine-leaf cluster. DDM telemetry reports steady 850nm/910nm optical levels, and the existing OM4 duplex LC cables easily push full 40Gbps throughput without packet drops.
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495620
464683
N***r
Chile
Verified
Purchase
5 .0
2025-12-26
Solid performance in our campus fiber aggregation setup. Swapped out 10G uplinks for these 40G BiDi modules over 95-meter OM3 runs. Transceiver temps stay under 42°C in a fully loaded Arista switch.
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character.
495620
464668
M***n
Colombia
Verified
Purchase
5 .0
2025-10-29
Migrated our enterprise SAN and 40G NAS storage rack without running expensive 12-fiber MPO trunks. Duplex LC fiber reuse saved massive labor, and DOM readings show flawless Tx and Rx bias currents.
United States · English · USD
