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HPE

HPE 720199-B21 | 40G QSFP+ DAC | 40GBASE-CR4 | 3m | QSFP+ to QSFP+

SKU:720199-B21

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Description

Passive QSFP+ to QSFP+ direct-attach copper cable for ultra-low-latency 40G links inside the rack. Ideal for TOR switch-to-server or switch-to-switch connections up to 3 m with zero external power and simplified cabling compared to discrete optics.

Features

- Ultra-low latency passive copper design
- 3 m length for clean, short-run connections
- No transceivers required—integrated QSFP+ ends
- Cost-effective alternative to optics for in-rack links
- MSA-compliant for broad device interoperability

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: What is the advantage of a passive DAC over optical modules?
A: Passive DACs offer the lowest latency, no optical power consumption, and reduced cost for short distances.

Q: What is the maximum supported distance?
A: This cable is 3 m in length. Passive DACs typically support up to a few meters depending on gauge and device capabilities.

Q: Is it suitable for both Ethernet and InfiniBand?
A: QSFP+ DACs are commonly used for 40GbE and compatible InfiniBand rates; verify platform support for your specific application.

Technical Specifications

- Cable type: Passive Direct-Attach Copper (DAC)
- Interface: QSFP+ to QSFP+
- Data rate: up to 40 Gbps
- Standard: 40GBASE-CR4, QSFP+ MSA
- Length: 3 meters
- Power: Passive, no external power required
- Typical use: Intra-rack, TOR connections

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