• Aruba S1J08A 50G QSFP56 to SFP56 DAC twinax cable 3m black
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Aruba

Aruba S1J08A | 50G DAC | QSFP56-to-SFP56 | 50GBASE-CR | passive twinax | 3m reach | connectors: QSFP56 & SFP56 | 1x50G PAM4 link | ultra‑low latency

S1J08A

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Description

High-performance 50G direct-attach copper cable with QSFP56-to-SFP56 ends for short-reach 50GBASE-CR links between switches and NICs. Passive twinax design delivers ultra-low latency and near-zero power with simple, reliable installation in high-density racks. Ideal for TOR/leaf-spine and server uplinks up to 3 meters.

Features

- 50G single-lane PAM4 performance for modern server uplinks
- Passive twinax design for ultra-low latency and zero active power draw
- QSFP56-to-SFP56 form for switch-to-NIC interconnects
- 3 m length ideal for in-rack and adjacent-rack runs
- Robust build for repeated insertions in dense data center environments

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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Technical Specifications

FAQs

Technical Specifications

- Data rate: 50 Gbps (single-lane PAM4)
- Form factor: QSFP56 to SFP56
- Standard: 50GBASE-CR (DAC)
- Cable type: Passive twinax copper
- Length: 3 meters
- Reach: up to 3 m
- Connectors: QSFP56 (switch) and SFP56 (NIC/port)
- Power consumption: near 0 W (passive)
- Use case: TOR/leaf-to-server 50G links
- Hot-swappable: yes (port dependent)

FAQs

Q: Is this cable active or passive?
A: It is a passive twinax DAC; no external power or electronics are required.

Q: Will this work with any 50G port?
A: It requires QSFP56 and SFP56 ports that support 50G DAC/CR operation; check device port specifications for 50GBASE-CR compatibility.

Q: Can this break out to multiple SFP56 connections?
A: No. This is a 1x50G QSFP56-to-1x50G SFP56 direct attach cable.

Q: What applications is this best for?
A: Short-reach 50G server uplinks, TOR connections, and in-rack links where low latency and low power are desired.

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