JG330A-BCC | Aruba Compatible 40GB QSFP to 4 x 10GB SFP+ Direct Attach Breakout Cable | 3M

Q: Will this work in place of the Aruba JG330A?
A: Yes. The JG330A-BCC implements the same 40GBASE-CR4 standard over a 3-meter passive twinax assembly with QSFP+ and 4x SFP+ connectors. It functions plug-and-play with Aruba switches that specify JG330A in their compatibility matrices, delivering the same 40Gbps aggregate bandwidth split across four independent 10Gbps lanes.

Q: Which Aruba and HPE platforms support this breakout cable?
A: This cable is compatible with Aruba FlexNetwork switches and HPE networking platforms that provide 40G QSFP+ ports with 40GBASE-CR4 support, such as FlexNetwork 5900 series and FlexFabric 5700 series. The QSFP+ end connects to any standards-compliant 40G QSFP+ cage, and the four SFP+ ends connect to 10GBASE-CU or 10GBASE-CR capable SFP+ ports. Confirm your specific platform supports passive DAC breakout cables and 40GBASE-CR4 signaling.

Q: How does passive copper differ from active breakout cables at this length?
A: This 3-meter passive cable relies entirely on the signal integrity of the copper medium and the transmit equalization and receive decision feedback in the host switch ASICs. No inline re-timing or signal conditioning exists within the cable assembly itself. Passive cables exhibit lower latency (typically sub-nanosecond insertion delay) and zero additional power draw, but reach is limited to 3 to 5 meters. Active cables with onboard re-drivers extend reach to 7 or 10 meters but add propagation delay and consume 1 to 2 watts per cable assembly.

Q: Can I connect the four SFP+ ends to ports on different switches?
A: Yes. Each of the four 10G lanes operates independently with no requirement for lane bonding or aggregation at the SFP+ end. The QSFP+ host port may require configuration to enable breakout mode, depending on the switch platform and network operating system. Once enabled, each SFP+ port appears as a separate 10G interface with its own MAC address, link state, and traffic counters. This topology is common when connecting a 40G core switch downlink to four separate 10G access switches.

Q: What is the maximum bend radius for this twinax cable, and does that affect signal integrity?
A: Twinax copper DAC assemblies typically specify a minimum dynamic bend radius of four times the cable outer diameter, which for a 30 AWG quad-lane assembly is approximately 20 to 25 mm during installation. Exceeding this bend causes impedance discontinuities and increases return loss, which degrades the eye diagram and raises bit error rate. For static installations, a slightly tighter radius may be tolerated, but avoid sharp kinks or routing the cable around edges smaller than 15 mm radius. The cable should route naturally without stress on the connector backshells.