'MPO/MTP'}
Arista QSFP-40G-SR4 New Optics WhaleyComm
Arista

Arista QSFP-40G-SR4 40G SR4 850nm QSFP+ Transceiver Optic Module

MPN: QSFP-40G-SR4
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$39.00
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Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.

Tested to factory specification. Backed by 25 years of enterprise trust.

The Arista QSFP-40G-SR4 is a high-performance 40 Gigabit QSFP+ optical transceiver designed for short-range multimode fiber applications. Operating at an 850nm wavelength, this SR4 optic delivers reliable, low-latency 40GbE connectivity across four parallel lanes, making it ideal for high-density data center environments, spine-leaf architectures, and enterprise core switching deployments.

Available in New condition, this unit has been verified to meet factory specifications and is fully compatible with Arista networking platforms and other standards-compliant 40G QSFP+ infrastructure.

Product Details

  • MPN: QSFP-40G-SR4
  • Vendor / Brand: Arista
  • Product Type: Optics / Optical Transceiver
  • Form Factor: QSFP+
  • Data Rate: 40 Gbps (4 x 10Gbps lanes)
  • Wavelength: 850nm
  • Fiber Type: Multimode (MMF)
  • Interface: SR4 (Short Range 4-lane)
  • Connector: MPO/MTP
  • Condition: New

Key Features

  • 40G SR4 parallel optics over OM3/OM4 multimode fiber
  • 850nm VCSEL laser array for reliable short-range transmission
  • Up to 150m reach on OM4 multimode fiber
  • Low power consumption optimized for high-density deployments
  • Hot-pluggable QSFP+ form factor for easy installation
  • Compatible with Arista 7050, 7060, 7160 series switches and other standards-compliant equipment
  • Digital Optical Monitoring (DOM) support
  • RoHS compliant
Technical Specifications
{'Manufacturer Part Number'
'QSFP-40G-SR4', 'Brand': 'Arista', 'Product Type': 'Optics / Optical Transceiver', 'Condition': 'New', 'MPN': 'QSFP-40G-SR4', 'Vendor / Brand': 'Arista', 'Form Factor': 'QSFP+', 'Data Rate': '40 Gbps (4 x 10Gbps lanes)', 'Wavelength': '850nm', 'Fiber Type': 'Multimode (MMF)', 'Interface': 'SR4 (Short Range 4-lane)', 'Connector': 'MPO/MTP'}
Ideal Use Cases
Inter-Switch Links and Uplinks
Optical transceivers enable high-speed connections between switches, servers, and storage devices where copper is insufficient for the required distance or bandwidth.
Data Center Backbone
Ideal for backbone links between core, distribution, and access switches in data center and campus environments at significant savings versus OEM pricing.
What's Included
✔ Arista QSFP-40G-SR4 New Optical Transceiver (1x)
✔ Protective dust caps installed
✔ WhaleyComm ISO 9001-certified inspection and testing certificate
✔ WhaleyComm Lifetime Warranty
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. No time limits, no expiration, no hidden conditions. Backed by 25 years and 5,000+ satisfied customers.
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Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
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Platform Compatibility

  • OS: Arista EOS — compatible with Arista CloudVision Portal (CVP)
  • Automation: Ansible, Puppet, Terraform, OpenConfig/gNMI
  • Optics: Arista-qualified SFP, SFP+, QSFP, QSFP28 and DAC/AOC cables
  • Standards: IEEE 802.1Q, 802.3ad, BGP, OSPF, EVPN, VXLAN
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Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
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Shipping
Orders ship within 1-2 business days from our facility in Texas. Overnight and expedited shipping available at checkout.
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Returns
Contact our support team for any DOA or warranty issues. Every WhaleyComm unit is covered by a Lifetime Warranty — we make it right, fast.
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Contact
+1 214 607-4800 | Mon-Fri 8am-6pm CST
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Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
This unit is sold as New and has never been deployed. It ships in original or equivalent packaging with a WhaleyComm Lifetime Warranty.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty — no time limits, no questions asked. If your Arista QSFP-40G-SR4 fails under normal operating conditions at any point, we replace it at no cost.
Every unit WhaleyComm ships undergoes an ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. Backed by 25 years of experience and 5,000+ enterprise customers.
Arista QSFP-40G-SR4 40G SR4 850nm QSFP+ Transceiver Optic Module
$39.00
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