Black Box 9.8ft 40G QSFP+ Direct Attach Cable (Black)

The Black Box QSFP-H40G-CU3M-BB is a 9.8 foot direct attach copper cable that uses QSFP+ connectors to move data at up to 40 Gbps. Built to follow both MSA and SFF-8436 specifications, it gives network teams a straightforward way to link switches, servers, or routers in the same rack without the cost and power draw of optical transceivers.

Because the cable is hot swappable, you can add or replace links during maintenance windows with minimal disruption. Data centers, university labs, and test environments often rely on this type of cable for short reach connections where low latency is critical and every watt counts.

The design works out of the box with Cisco equipment that accepts the QSFP-H40G-CUxM series, and it also cooperates with many devices from Ubiquiti, Mikrotik, and other vendors that honor the same standards. A CL2 rated PVC jacket provides a layer of safety for installations that must meet building code, and the cable keeps working across a wide temperature span from -4 to 158 °F, which covers most indoor network closets and server rooms.

Choose this cable when you want a reliable, plug-and-play path for 40 Gbps traffic inside a rack, especially in high density configurations where low power operation and easy management are priorities.

Highlights:

• Data transfer speed up to 40 Gbps
• 3 m (9.8 ft) overall length for in-rack connections
• QSFP+ connectors that meet MSA and SFF-8436 standards
• Works with Cisco, Ubiquiti, Mikrotik, and other compatible gear
• CL2 rated PVC jacket for in-building safety requirements
• Typical power consumption only 0.003 W
• Operational temperature range from -4 to 158 °F (-20 to 70 °C)