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| Form Factor | Part No. | Fiber Type | Data Rate | Wavelength | Distance | Connector | Temperature | Note |
40G QSFP- 40G QSFP | CL40GQ-QCU-1 | DAC | 40G | Cable | 1m | 30AWG | Com. | |
40G QSFP- 40G QSFP | CL40GQ-QCU-2 | DAC | 40G | Cable | 2m | 30AWG | Com. | |
40G QSFP- 40G QSFP | CL40GQ-QCU-3 | DAC | 40G | Cable | 3m | 30AWG | Com. | |
40G QSFP- 40G QSFP | CL40GQ-QCU-5 | DAC | 40G | Cable | 5m | 26AWG | Com. | |
40G QSFP- 40G QSFP | CL40GQ-QCU-7 | DAC | 40G | Cable | 7m | 24AWG | Com. | |
40G QSFP - 4x10G SFP+ | CL40GQ-4SCU-1 | DAC | 40G/10G | Cable | 1m | 30AWG | Com. | |
40G QSFP - 4x10G SFP+ | CL40GQ-4SCU-2 | DAC | 40G/10G | Cable | 2m | 30AWG | Com. | |
40G QSFP - 4x10G SFP+ | CL40GQ-4SCU-3 | DAC | 40G/10G | Cable | 3m | 30AWG | Com. | |
40G QSFP - 4x10G SFP+ | CL40GQ-4SCU-5 | DAC | 40G/10G | Cable | 5m | 26AWG | Com. | |
40G QSFP - 4x10G SFP+ | CL40GQ-4SCU-7 | DAC | 40G/10G | Cable | 7m | 24AWG | Com. |
C-LIGHT 40G DAC direct attach copper cables are designed for short-distance 40Gbps connectivity between network switches, servers, converters, and other high-speed data center equipment. The cable combines the copper transmission medium and connector assemblies into one integrated interconnect, providing a simple solution for short-reach network links.
The 40G DAC portfolio includes native 40G QSFP-to-QSFP connections as well as 40G QSFP-to-4x10G SFP+ breakout configurations. This allows the same product family to address both direct 40G links and network architectures where a 40G uplink needs to connect with multiple 10G interfaces.
C-LIGHT offers several cable lengths from 1m to 7m. Shorter configurations use 30AWG copper conductors, while longer 5m and 7m versions use 26AWG and 24AWG respectively, providing different options for rack layout and equipment placement.
The 40G DAC series follows relevant 40G Ethernet and QSFP interface specifications and is designed for practical deployment in high-density data center and high-performance networking environments.
Provides a direct 40Gbps electrical connection between compatible QSFP-based networking devices.
The native configuration connects two 40G QSFP interfaces for direct switch-to-switch or server-to-switch deployment.
The breakout version connects one 40G QSFP interface with four 10G SFP+ interfaces for mixed-speed network architectures.
Available configurations include 1m, 2m, 3m, 5m, and 7m cable lengths.
30AWG, 26AWG, and 24AWG copper constructions are used according to the selected cable length.
The cable packaging follows QSFP MSA requirements for compatible 40G networking equipment.
The communication protocol complies with IEEE 802.3ba for compatible 40G Ethernet applications.
C-LIGHT specifies InfiniBand NDR support for suitable high-performance computing network deployments.
40G DAC can provide short high-speed links between switches within the same rack or between nearby racks.
The cable can connect compatible 40G server interfaces and network switches without requiring separate optical modules and fiber patch cords.
Native QSFP-to-QSFP configurations are suitable for high-bandwidth uplinks between compatible switching platforms.
The 40G QSFP-to-4x10G SFP+ breakout configuration provides a practical way to connect a high-speed uplink with multiple 10G ports.
40G DAC can be deployed in computing environments requiring short-distance, high-bandwidth connections between servers and network infrastructure.
Supported configurations can be used in compatible InfiniBand environments where high-speed short-reach electrical connections are required.
The product is also designed for interconnection between compatible switches and converters in high-speed network deployments.
The 1m to 7m cable selection provides flexibility for equipment positioned within the same rack or in adjacent rack locations.
Native 40G QSFP-to-QSFP and 40G-to-4x10G breakout versions allow the product family to support different network topologies.
The 1m, 2m, 3m, 5m, and 7m options make it easier to select a cable based on the actual physical arrangement of network equipment.
Different conductor gauges are used across the length range to balance cable construction and short-distance transmission requirements.
The integrated cable structure simplifies short-reach connections by combining the connectors and copper transmission path into one assembly.
The direct electrical architecture is suitable for applications where short-distance connectivity and low transmission latency are important.
C-LIGHT states that the 40G DAC is compatible with more than 100 brands of switches.
C-LIGHT states that products undergo initial testing, final testing, and factory inspection as part of its quality management process.
C-LIGHT provides spot supply, customized cable services, technical guidance, long-term maintenance, and after-sales support.
A 40G DAC is a direct attach copper cable designed to provide 40Gbps connectivity between compatible network equipment over short distances.
C-LIGHT provides 40G QSFP-to-40G QSFP and 40G QSFP-to-4x10G SFP+ configurations.
The listed product configurations include 1m, 2m, 3m, 5m, and 7m cable lengths.
Yes. The 40G QSFP-to-4x10G SFP+ configuration is designed to connect one 40G QSFP interface with four 10G SFP+ interfaces.
The current product specifications list 30AWG for 1m to 3m versions, 26AWG for the 5m version, and 24AWG for the 7m version.
The communication protocol complies with IEEE 802.3ba, while the interface protocols comply with SFF-8436, SFF-8432, and SFF-8431. The packaging protocol follows QSFP MSA.
Yes. C-LIGHT specifies InfiniBand NDR support for its 40G DAC high-speed cable.
The cable is mainly intended for connections between switches, switches and servers, and switches and converters. C-LIGHT states that the product is compatible with more than 100 switch brands.
C-LIGHT 40G DAC direct attach copper cables provide a practical short-reach interconnect solution for data centers, servers, switches, converters, and high-performance networking environments. The product family covers both 40G QSFP-to-QSFP direct connections and 40G QSFP-to-4x10G SFP+ breakout links, with cable lengths from 1m to 7m and multiple copper gauge options. With IEEE 802.3ba compliance, QSFP MSA packaging, InfiniBand NDR support, broad switch compatibility, and C-LIGHT customization and technical support, the 40G DAC series can address a wide range of short-distance 40G network deployment requirements.
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●100% of products pass initial test, final test and factory inspection.
●3-step quality control management process.
●100% complete implementation of customer order quality requirements.
●100% guarantee of customer product data information security.
Please contact us to download the certification certificate.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
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