• Silver-colored Arista 40G QSFP+ to 4x 10G SFP+ DAC breakout cable modules with blue handles and metallic connectors
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Arista

Arista CAB-Q-S-1M | 40G QSFP+ to 4x 10G SFP+ DAC Breakout Cable, 1m

Arista CAB-Q-S-1M | 40G QSFP+ to 4x 10G SFP+ DAC Breakout Cable, 1m

CAB-Q-S-1M

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Description

The Arista CAB-Q-S-1M is a 40G QSFP+ to 4x 10G SFP+ passive Direct Attach Copper (DAC) breakout cable designed for high-density data centre deployments. Using Twinax copper construction, this 1-metre cable splits a single 40GbE QSFP+ port into four independent 10GbE SFP+ connections, delivering a cost-effective, low-latency alternative to optical transceivers for short-reach breakout applications. Its passive design means zero active electronics, minimal power draw, and no additional configuration overhead.

Fully compliant with SFP+ and QSFP+ MSA standards, the CAB-Q-S-1M integrates seamlessly with Arista EOS and CloudVision for plug-and-play deployment in Arista switching environments. The cable also supports QDR InfiniBand, SAS, and Fibre Channel, making it suitable for HPC and storage interconnects beyond standard Ethernet. Backed by Arista TAC support and a 1-Year Limited Hardware Warranty. Available now at iptrading.com.au — competitive prices and local support.

Features

- Splits one 40G QSFP+ port into four independent 10G SFP+ connections for high-density port breakout
- Passive design — no active electronics, delivering ultra-low power consumption
- Low latency construction ideal for high-performance data centre and HPC environments
- Protocol-agnostic: supports 40GbE, QDR InfiniBand, SAS, and Fibre Channel
- Fully compliant with SFP+ and QSFP+ MSA (Multi-Source Agreement) standards
- Low crosstalk and low pair-to-pair skew for maintained signal integrity
- Robust zinc die-cast connectors with pull-to-release latching for secure, reliable connections
- Hot-pluggable with factory-terminated module ends for plug-and-play deployment
- Full integration with Arista EOS and CloudVision management platform
- Fully backed by Arista TAC support

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

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

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Part Number: CAB-Q-S-1M
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Connector A: 1x QSFP+ (40 Gb/s, SFF-8436 Compliant)
- Connector B: 4x SFP+ (10 Gb/s each, SFF-8431 Compliant)
- Aggregate Data Rate: 40 Gb/s (4 x 10.3125 Gb/s per SFP+ channel)
- Form Factor: QSFP+ to 4x SFP+ Breakout
- Protocol: 40GBase-CU4 / QDR InfiniBand
- Cable Length: 1 Metre (3.3 ft)
- Cable Gauge: AWG30
- Active/Passive: Passive (no active electronics)
- Connector Style: Zinc die-cast with pull-to-release latching
- Hot-Pluggable: Yes
- Warranty: 1-Year Limited Hardware Warranty

FAQs

Q: What does the Arista CAB-Q-S-1M do?
A: The CAB-Q-S-1M is a passive DAC breakout cable that splits a single 40GbE QSFP+ port into four independent 10GbE SFP+ connections. This allows data centre operators to maximise port density and connect 10G devices directly to 40G switches without the cost of optical transceivers.

Q: Is the CAB-Q-S-1M compatible with non-Arista switches?
A: The CAB-Q-S-1M is fully compliant with SFP+ (SFF-8431) and QSFP+ (SFF-8436) MSA standards, meaning it is designed to work with Arista equipment and natively integrates with Arista EOS. Compatibility with third-party switches may vary depending on the vendor's transceiver validation policies.

Q: Does this cable require any configuration or drivers?
A: No. As a passive DAC cable, the CAB-Q-S-1M requires no active components, drivers, or special configuration. It is hot-pluggable and plug-and-play compatible with Arista EOS and CloudVision environments.

Q: What protocols does the CAB-Q-S-1M support beyond 40GbE?
A: In addition to 40GbE (40GBase-CU4), the cable supports QDR InfiniBand, SAS, and Fibre Channel, making it suitable for HPC interconnects and storage networking as well as standard Ethernet deployments.

Q: Can I purchase the Arista CAB-Q-S-1M in Australia?
A: Yes. The Arista CAB-Q-S-1M is available through IP Trading at iptrading.com.au. IP Trading is an Australian B2B IT hardware reseller offering competitive pricing and local support for Arista networking products.

Q: What warranty is included with the CAB-Q-S-1M?
A: The CAB-Q-S-1M comes with a 1-Year Limited Hardware Warranty covering parts, repair, or replacement with a 10 business day turnaround. Optional Next Business Day and 4-Hour Advance Hardware Replacement support services are also available through Arista.

Datasheet

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