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HPE

HPE 845408-B21 | 100G QSFP28 to QSFP28 DAC | 100GBASE-CR4 | Passive | 5m | QSFP28 plugs

SKU:845408-B21

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Description

Passive 100G QSFP28 twinax direct attach cable for economical, low‑latency connections up to 5 meters. Suited to top‑of‑rack to adjacent rack links, server/NIC attachment, and short switch uplinks.

Features

- Low‑cost 100G short‑to‑medium reach
- Passive copper for minimal latency
- No optics modules required
- QSFP28 hot‑swap convenience
- Durable twinax construction

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: When should I choose a 5m passive DAC?
A: When you need cost‑effective 100G links within or between adjacent racks and your devices support QSFP28 DAC up to 5 m.

Q: Is any configuration required?
A: Typically no. Insert both ends into QSFP28 ports and the link negotiates per CR4 standards.

Q: Will this work across different vendors’ devices?
A: Physical layer is standard, but EEPROM coding may need to match each device. Use platform‑coded cables as required.

Q: Does it support breakout to 4x25G?
A: No. Use a QSFP28 to 4xSFP28 breakout cable for that topology.

Technical Specifications

- Data rate: 100 GbE
- Form factor: QSFP28 (both ends)
- Cable type: Passive twinax copper DAC
- Length: 5 meters
- Standard: 100GBASE-CR4
- Power: Ultra‑low (passive design)
- Applications: Rack‑to‑rack short interconnects, TOR aggregation
- Hot‑pluggable QSFP28 connectors integrated

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