HPE 845406-B21

Overview

The HPE 845406-B21 is a 3-meter direct attach copper cable designed to connect two QSFP28 ports at speeds up to 100Gbps. It serves as a reliable link for high-speed networking equipment, particularly in data centers and server racks where short-distance connections are essential. With a copper construction and a diameter of 8.8 mm, this cable balances flexibility and durability, supporting 100GBase direct attach standards for broad compatibility with devices from HPE, Cisco, Arista, and Juniper.

Its design ensures low latency with a signal delay of only 4.5 nanoseconds per meter, making it suitable for environments that demand fast and efficient data transmission. The cable also meets the SFF-8665 standard and operates reliably within a temperature range of 32 to 158 degrees Fahrenheit, providing consistent performance in demanding network setups.

Key features

• Supports 100Gbps QSFP28 to QSFP28 connections for high-speed data transfer
• 3-meter length ideal for short-range connections in dense networking environments
• Copper cable with 8.8 mm diameter offers flexibility to fit into tight spaces without compromising signal integrity
• Minimum bend radius of 45 mm reduces risk of damage and maintains cable longevity
• Low signal delay of 4.5 nanoseconds per meter ensures minimal latency for time-sensitive applications
• Complies with 100GBase direct attach standards for broad device compatibility
• 110 ohm impedance maintains consistent signal quality across connections
• Compatible with major networking brands including HPE, Cisco, Arista, and Juniper
• Meets SFF-8665 standard for reliable and standardized performance
• Operates effectively within a temperature range of 32 to 158 degrees Fahrenheit, suitable for typical data center conditions

Key specs

• Data rate: 100 Gbps
• Connector type: QSFP28 to QSFP28
• Cable length: 3 meters
• Cable diameter: 8.8 mm
• Minimum bend radius: 45 mm
• Signal delay: 4.5 nanoseconds per meter
• Impedance: 110 ohms
• Standard compliance: SFF-8665, 100GBase direct attach
• Operating temperature: 32 to 158 degrees Fahrenheit

Connectivity and compatibility

This cable is designed to seamlessly connect QSFP28 ports, commonly found on high-performance switches and servers. Its adherence to 100GBase direct attach standards ensures it works well with a variety of networking equipment from leading manufacturers. Whether integrating into an existing HPE infrastructure or connecting devices from Cisco, Arista, or Juniper, this cable provides a straightforward and dependable connection.

• QSFP28 connectors on both ends for direct high-speed links
• Compatible with HPE, Cisco, Arista, and Juniper networking devices
• Supports 100GBase direct attach standard for broad interoperability

Ideal uses and environments

The HPE 845406-B21 is well suited for data centers, server rooms, and enterprise networking environments where short-range, high-speed connections are required. Its flexible copper design fits neatly into dense rack setups, helping to maintain organized cabling without sacrificing performance. Network administrators upgrading infrastructure or deploying new equipment will find this cable a practical choice for maintaining low latency and high throughput in critical applications.

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.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, 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; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

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.

Learn more