CAB-Q-Q-40G-3M: Arista 40GbE QSFP+ Direct Attach Copper Cable 3m
Also listed as: CAB-Q-Q-40G-3M-AR, CAB-Q-Q-40G-3M-C
The Arista CAB-Q-Q-40G-3M is a 3-meter passive QSFP+ direct attach copper cable providing 40 Gigabit Ethernet inter-switch connectivity within equipment racks.
Specifications
| Part number | CAB-Q-Q-40G-3M |
|---|---|
| Brand | Arista |
| Type | Cables |
| Other numbers | CAB-Q-Q-40G-3M-AR, CAB-Q-Q-40G-3M-C |
| Status | current |
| Form factor | QSFP+ |
| Speed | 40GbE |
| Connector | QSFP+ to QSFP+ |
| Cable type | Twinaxial passive copper |
| Max distance m | 3 |
About the CAB-Q-Q-40G-3M
The Arista CAB-Q-Q-40G-3M direct attach copper cable assembly provides high density 40 Gigabit Ethernet connectivity for data center racks and adjacent enclosures. Containing eight high speed twinaxial wire pairs supporting four 10Gbps full duplex transmission lanes, it offers an economical low latency solution for short-reach inter-switch links.
Compatibility
Compatible with Arista 7050Q, 7050QX, 7060CX, 7280SE, and 7500 Series modular line cards equipped with QSFP+ ports. It connects spine switches to top-of-rack leaf switches and bridges high performance compute nodes without the added power and cost of optical modules.
How to identify a genuine unit
Constructed with a heavy gauge black twinaxial cable jacket and durable metal QSFP+ connector housings. Both connector ends feature an integrated pull tab release latch and an adhesive identification label displaying Arista part number CAB-Q-Q-40G-3M and serial number.
Buying used
Inspect the cable outer insulation for pinch points or sharp bends that could impair differential pair signal integrity. Verify that connector latching springs engage securely into switch cages and check that Arista EOS establishes link state immediately without reporting bit errors.
Fits these models
- Arista 7050X 7050CX3-32S
- Arista 7050X 7050QX-32S
- Arista 7050X 7050SX-64
- Arista 7050X 7050SX-72Q
- Arista 7050X 7050SX2-128
- Arista 7050X 7050TX-64
- Arista 7050X 7050TX3-48C8
- Arista 7060X 7060CX-32S
- Arista 7060X 7060CX2-32S
- Arista 7060X 7060DX4-32
- Arista 7060X6-32D
- Arista 7260X 7260CX3-64
Check compatibility with Arista
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Arista has tested with the Arista CAB-Q-Q-40G-3M.
- Compatibility Arista transceivers and cables
- Support Arista Support
FAQ
What is the physical length of CAB-Q-Q-40G-3M?
It is exactly 3 meters in total length.
Does this cable support 40Gbps line rate?
Yes, it supports four differential copper channels operating at 10Gbps each for 40Gbps aggregate rate.
Buying or selling CAB-Q-Q-40G-3M?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Arista Transceiver and Cable Guide, checked 2026-10-27