HPE 487655-B21 3m 10Gb SFP+ Copper Cable

For a short 10 Gigabit Ethernet link, fibre optics are not the only option. HPE 487655-B21 is a 3 metre SFP+ to SFP+ direct-attach copper (DAC) cable for HPE BladeSystem c-Class environments. The SFP+ ends are permanently attached to the copper cable, creating a complete interconnect rather than a combination of separate transceivers and fibre patch leads. HPE QuickSpecs confirm support for 10GbE operation and position the cable as a short-range data-centre connectivity option. For compatible ports within the same rack or nearby equipment, the 3 metre length offers useful reach without moving to a longer optical link.

Direct Attach Copper Explained in Practical Terms

A DAC cable combines the cable and SFP+ connector ends into one assembly. There is no need to select two separate pluggable optical modules and then add a fibre cable between them. For short links, that can simplify the physical connection and reduce the number of individual components involved.

HPE describes its direct-attach copper family as a lower-cost alternative to fibre optics for suitable short-range connections. The 487655-B21 model supports serial transmission at the 10GbE data rate and is documented as SFF-8431 compliant in HPE QuickSpecs. Its 3 metre length is 9.84 feet, making it useful where the connected devices are separated by more than a very short one-metre run.

Technical Profile of 487655-B21

• Product: HPE BladeSystem c-Class 10GbE SFP+ to SFP+ Direct Attach Copper Cable
• Part number: 487655-B21
• Length: 3 metres / 9.84 ft
• Network rate: 10 Gigabit Ethernet
• Connector format: SFP+ at both ends, permanently attached
• Medium: Copper
• Characteristic impedance: 100 ohms
• Minimum cable bend radius: 1 inch

Where a 3 Metre DAC Makes Sense

Short-range data-centre links often connect equipment within a rack or across nearby rack positions. In that setting, 487655-B21 provides more routing room than a one-metre cable while remaining within the type of distance for which direct-attach copper is designed. The integrated SFP+ ends also make the assembly easy to identify as one HPE networking part.

The cable can be particularly relevant when maintaining an existing BladeSystem c-Class installation that already uses HPE DAC connectivity. HPE’s documentation lists 487655-B21 as the 3 metre model and 537963-B21 as a 5 metre model in the same cable family, allowing cable length to match the physical layout of the supported environment.

Copper Fibre Channel, Mini-SAS and 10GbE DAC Are Not the Same

The word “copper” appears across several enterprise cable categories, but the interfaces and applications can be completely different. The HPE 17-05157-04 2m copper Fibre Channel interface cable, for example, is associated with Enterprise Virtual Array storage and uses integrated SFP transceivers with LC connectors. It is not a 10GbE SFP+ DAC.

Likewise, the HPE 407339-B21 2m External Mini-SAS Cable serves SAS storage connectivity, while the HPE 416706-001 10m SCSI cable belongs to an earlier tape-interface generation. Internal components such as the HPE 448180-001 SATA data cable and HPE 484355-001 optical-drive cable assembly operate inside ProLiant servers. These examples show why the interface standard and HPE part number matter more than the broad description “copper cable”.

New and Refurbished DAC Options

New HPE 487655-B21 cables can suit fresh connections in compatible existing infrastructure or provide unused spares for a networking inventory. Refurbished units offer another route for organisations maintaining BladeSystem-era equipment and wanting to keep the same documented cable type in service. Because the SFP+ ends are integrated into the assembly, the product is sourced as the complete cable rather than as separate transceivers and a passive lead.

Order the HPE 487655-B21 3m 10GbE DAC

HPE 487655-B21 provides a documented 3 metre direct-attach copper connection for compatible 10GbE SFP+ environments. Its integrated connector ends and short-range design make it a focused networking component for supported HPE infrastructure. Explore the available New and Refurbished stock at Euroland IT Store, or contact the team if you are matching cable lengths and part numbers across an existing BladeSystem deployment.

FAQs for HPE 487655-B21

What is HPE 487655-B21?

HPE 487655-B21 is a 3 metre 10GbE SFP+ to SFP+ direct-attach copper cable for compatible HPE networking environments.

What data rate does 487655-B21 support?

HPE QuickSpecs state that the cable supports 10 Gigabit Ethernet data-rate operation.

How long is the HPE 487655-B21 cable?

It is 3 metres, or approximately 9.84 feet, long.

Are the SFP+ connectors included with 487655-B21?

Yes. The direct-attach design has SFP+ connector/transceiver ends permanently attached to the copper cable.

Is 487655-B21 a fibre-optic cable?

No. It is a direct-attach copper cable designed as a short-range 10GbE connectivity option.

Which HPE family is named for 487655-B21?

HPE identifies it as the BladeSystem c-Class 10GbE SFP+ to SFP+ 3m Direct Attach Copper Cable.

Is there a longer HPE cable in the same family?

Yes. HPE QuickSpecs also list a 5 metre BladeSystem c-Class 10GbE SFP+ direct-attach copper cable under part number 537963-B21.