HPE SPS-CABLE QSFP28-4SFP28 DAC/3M

For dense 100G-to-25G leaf-spine links, this HPE direct attach copper breakout cable eliminates the cost and latency of optics by splitting a single QSFP28 port into four independent SFP28 channels over a 3-meter passive assembly. Unlike generic DACs that often struggle with signal integrity in mixed-vendor racks, the 850397-001 is engineered for HPE Aruba switching and server NICs, ensuring consistent 25G per lane without retimers or external power.

Highlights

• Aggregate 100 Gbps data rate with 25 Gbps per lane for high-density 25G server connectivity
• Passive copper design draws no additional power, reducing energy costs and heat in the rack
• QSFP28 to 4x SFP28 breakout enables direct connection from a 100G port to four 25G ports
• Hot-swappable connectors support quick deployment and maintenance without downtime
• Compliant with IEEE 802.3bj, SFF-8665, and SFF-8402 for reliable interoperability
• 30 AWG wire with PVC jacket balances flexibility and durability in data center aisles

In daily use

This cable shines in top-of-rack aggregation where a single 100G QSFP28 uplink must fan out to four 25G servers or storage nodes. The 3-meter length reaches across a standard rack or between adjacent cabinets, while the passive design means no firmware, no configuration, and no compatibility surprises. The black jacket resists snags and is easy to route alongside other cabling, and the low power consumption helps maintain thermal headroom in high-density enclosures.

Full specifications

• Brand: HPE
• Model: 850397-001
• MPN: 850397-001
• Cable type: Direct Attach Copper (DAC) breakout
• Connector 1: QSFP28
• Connector 2: 4x SFP28
• Cable length: 3 m (9.84 ft)
• Data rate: 100 Gbps aggregate (4x 25 Gbps)
• Transceiver type: Passive
• Wire gauge: 30 AWG
• Jacket material: PVC
• Impedance: 100 Ohm differential
• Operating temperature: 0°C to 70°C
• Standards: IEEE 802.3bj, SFF-8665, SFF-8402
• Hot-swappable: Yes
• Product colour: Black

Final note

A purpose-built HPE breakout DAC that turns one QSFP28 port into four 25G links with zero added power and proven Aruba compatibility.