• Silver-colored sfp+ transceiver modules with blue plastic handles and metallic connectors in arista 400g osfp to 4x 100g qsfp breakout dac cable 3m
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Arista

Arista CAB-O-4Q-400G-3M | 400G OSFP to 4x 100G QSFP Breakout DAC Cable, 3m

Arista CAB-O-4Q-400G-3M | 400G OSFP to 4x 100G QSFP Breakout DAC Cable, 3m

CAB-O-4Q-400G-3M

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Description

This 400G to 4x100G breakout Direct Attach Copper (DAC) cable delivers high-density, low-latency fan-out connectivity in data centre environments. Featuring a passive twinax copper design with an OSFP connector on one end and four 100GBASE-CR2 QSFP connectors on the other, it enables a single 400G switch port to serve four independent 100G devices — ideal for top-of-rack and spine-to-leaf interconnects where port density and power efficiency are critical. Operating across 8 x 50G PAM-4 electrical lanes, it requires no active components and draws minimal power.

Compatible with Arista EOS 4.23.0 and later, this cable integrates seamlessly into Arista data centre switching platforms. Its hot-swappable design minimises downtime during installation or servicing, and MSA compliance ensures interoperability across standards-based environments. In stock and ready to ship from iptrading.com.au — order now for fast dispatch.

Features

- Passive copper breakout design — no active components, ultra-low power consumption
- Breaks out a single 400G OSFP port into four independent 100G QSFP connections
- 8 x 50G PAM-4 electrical lanes for high-speed, low-latency data centre interconnects
- Hot-swappable for maximum uptime and simplified servicing
- MSA-compliant for broad interoperability across standards-based environments
- Compatible with Arista EOS 4.23.0 and later
- Ideal for top-of-rack, spine-to-leaf, and high-density server connectivity deployments
- Part of Arista's comprehensive connectivity portfolio spanning 1G to 400GE (DAC, AOC, and fibre)

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-O-4Q-400G-3M
- Cable Type: Passive Twinax Copper Direct Attach Cable (DAC)
- Speed: 400GBASE-CR8 (OSFP) to 4 x 100GBASE-CR2 (QSFP)
- Connector A: OSFP (Octal Small Form-factor Pluggable)
- Connector B: 4 x QSFP (100GBASE-CR2)
- Cable Length: 3 metre
- Electrical Lanes: 8 x 50G PAM-4 (OSFP side); 2 x 50G PAM-4 per QSFP (breakout side)
- Minimum EOS Version: 4.23.0
- Active/Passive: Passive (no active components)
- Series lengths available: 1m, 2m, 3m

FAQs

Q: What does this cable do — how does the 400G to 4x100G breakout work?
A: The CAB-O-4Q-400G-3M takes a single 400G OSFP port on an Arista switch and fans it out into four independent 100G QSFP connections. This is achieved via 8 x 50G PAM-4 electrical lanes on the OSFP side, split two lanes per QSFP on the breakout end — allowing four separate devices or servers to each receive a dedicated 100G link from one switch port.

Q: Is this an active or passive cable, and what are the power implications?
A: This is a fully passive twinax copper DAC cable with no active electronic components. This means near-zero power consumption beyond what the host ports supply — making it an energy-efficient choice for high-density data centre environments compared to active optical cables or transceivers.

Q: Which Arista platforms and EOS versions support this cable?
A: The CAB-O-4Q-400G-3M requires Arista EOS version 4.23.0 or later. It is designed for use with Arista switches equipped with OSFP ports, such as those in the 7800R3 and 7500R3 series. Always verify your platform's compatibility matrix before ordering.

Q: Can this cable be used with non-Arista equipment?
A: The cable is MSA-compliant, meaning it adheres to industry-standard specifications for OSFP and QSFP form factors. Compatibility with third-party equipment depends on the vendor's qualification and firmware support. For guaranteed operation, it is recommended for use within Arista-validated environments.

Q: Can I purchase this cable in Australia from IP Trading, and what are the lead times?
A: Yes — the CAB-O-4Q-400G-3M is stocked and available through iptrading.com.au for Australian businesses. IP Trading is a specialist B2B IT hardware reseller with fast local dispatch. Orders placed from stock are processed quickly for delivery across Australia.

Q: What warranty is included with this Arista DAC cable?
A: Arista provides 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 for mission-critical deployments.

Datasheet

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