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HPE

HPE 721064-B21 | 40G QSFP+ to 4x10G SFP+ | 3m DAC breakout | 40GBASE-CR4/10GBASE-CR | copper, passive | QSFP+ to 4x SFP+

SKU:721064-B21

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Description

A 3m passive twinax breakout cable that splits one QSFP+ 40G port into four SFP+ 10G links for short-reach, low-latency connections without separate optics. Ideal for ToR breakout from 40G switch ports to 10G server NICs.

Features

- Low power, low latency copper interconnect
- Cost-effective 40G to 4x10G breakout
- Tool-free deployment—no optics needed
- Standards-compliant for broad interoperability
- Rugged twinax design for reliable ToR/edge wiring

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Is this cable active or passive?
A: It is a passive twinax DAC cable.

Q: Can I use it to break out a 40G switch port to four 10G ports?
A: Yes, provided the switch and connected devices support 40G-to-4x10G breakout (often labeled 40G BiDi/Breakout).

Q: Are additional transceivers needed?
A: No, DAC cables have integrated terminations and do not require separate optics.

Q: What is the recommended application distance?
A: 3 meters, suitable for within or between adjacent racks.

Technical Specifications

- Cable type: Direct Attach Copper (DAC), passive
- Interface: 1x QSFP+ (40G) to 4x SFP+ (10G) breakout
- Data rates: 40GbE to 4x 10GbE
- Length: 3 meters
- Standards: IEEE 802.3ba; 40GBASE-CR4 / 10GBASE-CR
- Compliance: SFF-8436 (QSFP+), SFF-8431 (SFP+)
- Use case: Short-reach, low-power intra-rack/inter-rack connections
- No separate optics required

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