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HPE

HPE 845406-B21 | 100G QSFP28 to QSFP28 DAC | 100GBASE-CR4 | Passive | 3m | QSFP28 plugs

SKU:845406-B21

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Description

Passive 100G QSFP28 direct attach copper twinax cable for ultra‑low latency, short‑reach interconnects. Ideal for switch‑to‑server or switch‑to‑switch links within the rack. No optics required; minimal power draw and simplified deployment.

Features

- Cost‑effective 100G short‑reach connectivity
- Ultra‑low latency with passive copper
- Simple, plug‑and‑play deployment
- Robust shielded twinax construction
- No separate transceivers required

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 typical use case for a passive 3m DAC?
A: Short in‑rack connections such as switch‑to‑server or adjacent switch links where ultra‑low latency and low cost are priorities.

Q: Is this cable vendor‑agnostic?
A: Electrically it follows QSFP28/CR4 specs but coding may be platform‑specific. Ensure the coding matches the target device.

Q: Can this be used as a 4x25G breakout?
A: No. A dedicated QSFP28 to 4xSFP28 breakout DAC/AOC is required for 4x25G.

Q: Does it require separate optics?
A: No. The QSFP28 connectors are integrated; no additional optics are needed.

Technical Specifications

- Data rate: 100 GbE
- Form factor: QSFP28 (both ends)
- Cable type: Passive twinax copper DAC
- Length: 3 meters
- Standard: 100GBASE-CR4
- Power: Ultra‑low (no active components)
- Applications: In‑rack switch, server/NIC, storage, short switch uplinks
- Hot‑pluggable QSFP28 modules integrated

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