Black Box QSFP-H40G-CU3M-BB

Overview

The Black Box QSFP-H40G-CU3M-BB is a 9.8-foot direct attach copper cable designed to deliver data transfer speeds up to 40 Gbps. It serves as a cost-effective and energy-efficient solution for connecting switches, servers, or routers within the same rack, eliminating the need for optical transceivers. This cable is ideal for environments where low latency and power savings are essential, such as data centers, university labs, and test setups.

Key features

• QSFP+ connectors compliant with MSA and SFF-8436 standards ensure broad compatibility and reliable performance.
• Hot-swappable design allows network teams to add or replace connections during maintenance without disrupting operations.
• CL2 rated PVC jacket meets building safety codes, making it suitable for indoor installations in network closets and server rooms.
• Low power consumption of approximately 0.003 W helps reduce overall energy costs in high-density configurations.
• Wide operational temperature range from -4 to 158 °F (-20 to 70 °C) supports stable performance in typical indoor environments.
• Plug-and-play functionality simplifies setup and management, especially in racks with multiple high-speed connections.

Key specs

• Data transfer speed: up to 40 Gbps
• Cable length: 9.8 feet (3 meters)
• Connector type: QSFP+ (Quad Small Form-factor Pluggable Plus)
• Standards compliance: MSA and SFF-8436
• Power consumption: approximately 0.003 W
• Jacket rating: CL2 PVC for in-building safety
• Operating temperature range: -4 to 158 °F (-20 to 70 °C)

Connectivity and compatibility

This cable is designed to work seamlessly with Cisco equipment that supports the QSFP-H40G-CUxM series. It also maintains compatibility with devices from Ubiquiti, Mikrotik, and other vendors that adhere to the same QSFP+ standards. This broad compatibility makes it a flexible choice for mixed-vendor network environments.

Ideal uses and environments

The QSFP-H40G-CU3M-BB fits well in data centers and server rooms where short-reach, high-speed connections are needed within racks. Its low latency and power efficiency make it suitable for setups that prioritize performance and energy savings. It is also a strong option for university labs and test environments where quick, reliable data links are essential.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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