Description
The AddOn Arista Networks® QSFP-40G-LR4-AR-20-AO is a high-performance, hot-swappable 40GBase-LR4 QSFP+ transceiver designed for data center, enterprise, and access network applications. Delivering up to 40Gbps Ethernet throughput over single-mode fiber (SMF) for distances up to 20km, this module utilizes four CWDM channels operating between 1270nm and 1330nm via an LC duplex connector.
Engineered for seamless compatibility, it is 100% guaranteed to function identically to the OEM Arista Networks® transceiver, with Digital Optical Monitoring (DOM) support for real-time diagnostics and performance monitoring. Fully compliant with IEEE 802.3ba, QSFP+ MSA, and SFF-8436, this module ensures reliability and interoperability across diverse networking environments. Additionally, it is TAA compliant, RoHS certified, and comes with a limited lifetime warranty, making it a dependable choice for scalable, high-speed optical connectivity.
| Specification | Description |
|---|---|
| Brand | AddOn |
| SKU | QSFP-40G-LR4-AR-20-AO |
| Compatibility | Arista Networks® |
| Form Factor | QSFP+ |
| Data Rate | 40Gbps |
| Standards Compliance | IEEE 802.3ba, QSFP+ MSA, SFF-8436 |
| Wavelength | 1270nm – 1330nm (4 CWDM channels) |
| Connector Type | LC Duplex |
| Fiber Type | Single-Mode Fiber (SMF) |
| Max Reach | 20km |
| Optical Components | 4x CWDM DFB transmitter, 4x PIN photodiode receiver |
| DOM Support | Yes |
| Laser Safety | Class 1 |
| Operating Temperature | 0°C to 70°C |
| Storage Temperature | -40°C to +85°C |
| Power Dissipation | 3.5W (max) |
| Module Supply Current | 1100mA |
| Transmitter Launch Power (per lane) | -3 to +2.3 dBm |
| Receiver Sensitivity (OMA) | -11.5 dBm |
| Optical Return Loss Tolerance | 12 dB |
| Extinction Ratio | ≥ 3.5 dB |
| Management Interface | 2-wire serial (I²C) |
| Compliance | TAA, RoHS |
| Warranty | Limited Lifetime Warranty |
Payment & Security
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Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
