40G QSFP+ Passive DAC

Wolon's 40G QSFP+ Passive Direct Attach Copper (DAC) Cable is engineered to deliver high-speed, low-latency connectivity between network equipment supporting 40 Gigabit Ethernet. Designed for short-distance, high-bandwidth data transmission, this cable features QSFP+ connectors on both ends and supports data rates up to 40Gbps over cost-efficient copper twinax.

Ideal for Top-of-Rack (ToR) or Middle-of-Row (MoR) deployments, the Wolon 40G DAC is optimized for aggregation-layer switching and high-density server connections, providing a scalable solution for modern data centers transitioning from 10G/25G to 40G infrastructure.
 

Ultra-Fast 40Gbps Performance
Supports 4x10Gbps lanes, aggregated over a single QSFP+ DAC cable. Perfect for high-throughput applications and core-to-aggregation layer connectivity.

QSFP+ to QSFP+ Passive Copper Cable
Hot-pluggable QSFP+ connectors on both ends. Passive design eliminates the need for power-consuming components, offering a low-cost, plug-and-play solution.

Optimized for Short-Distance Links
Best suited for connections up to 7 meters (depending on gauge), such as switch-to-switch, switch-to-server, or within High Performance Computing (HPC) clusters.

Fully Standards Compliant
Complies with IEEE 802.3ba (40GBASE-CR4), SFF-8436, and QSFP+ MSA. Fully compatible with Cisco, Juniper, Arista, and other major OEM platforms.

EEPROM Enabled for Compatibility
Each connector includes an EEPROM programmed for seamless integration with host systems, enabling automatic detection and monitoring.

Superior Signal Performance
Uses low-loss twinax copper for excellent EMI shielding, low crosstalk, and stable performance even in dense rack environments.

Certified and Tested
RoHS and CE compliant. Each unit is factory-tested for electrical integrity, signal performance, and brand compatibility.

•40G Ethernet switch-to-switch backbone connections

•High-density QSFP+ aggregation links in enterprise networks

•Rack-to-rack 40G DAC connectivity in large-scale data centers

•Cost-effective replacement for optical transceivers at short range

•Interconnects within high-bandwidth storage or compute clusters

•100% compatibility with major switch vendors

•Perfect for data center core and aggregation layer architecture

•Plug-and-play with zero power overhead

•Scalable solution for high-performance networking

•Backed by Wolon's professional testing and quality assurance

Specifications