Description
The AddOn Cisco® QSFP-40G-SR4-LC-AO is a high-performance, cost-effective QSFP+ optical transceiver designed for 40 Gigabit Ethernet applications in enterprise, access, and data center networks. Fully compatible with Cisco® QSFP-40G-LX4 modules, it provides 40GBase-LX4 throughput over single-mode fiber (SMF) at distances of up to 150 m using wavelengths from 1270 nm to 1330 nm via a duplex LC connector.
Engineered for reliability and seamless deployment, this hot-pluggable transceiver supports Digital Optical Monitoring (DOM) for real-time diagnostics and meets SFF-8436 standards. It is TAA-compliant, RoHS-certified, and lead-free, ensuring adherence to strict environmental and trade regulations. Each unit undergoes comprehensive application and traffic testing for guaranteed interoperability and performance matching OEM standards. Ideal for high-speed aggregation, server interconnects, and cloud infrastructure, it delivers superior signal integrity, low power consumption, and robust ESD protection, backed by AddOn’s limited lifetime warranty.
| Specification | Details |
|---|---|
| Brand | AddOn |
| Model / SKU | QSFP-40G-SR4-LC-AO |
| Compatibility | Cisco® QSFP-40G-LX4 |
| Form Factor | QSFP+ |
| Data Rate | 40 Gbps (4 × 10.3125 Gb/s lanes) |
| Wavelength Range | 1270 nm – 1330 nm |
| Connector Type | Duplex LC |
| Fiber Type | SMF (Single-Mode Fiber) |
| Maximum Reach | Up to 150 m (OM3 MMF) / 2 km (SMF) |
| Digital Optical Monitoring (DOM) | Supported |
| Compliance Standards | SFF-8436, IEEE 802.3ba |
| Operating Temperature | 0 °C – 70 °C |
| Storage Temperature | -40 °C – 85 °C |
| Power Supply Voltage | 3.135 V – 3.465 V |
| Power Consumption | ≤ 3.5 W |
| Supply Current | 1.1 A (typical) |
| Launch Power (MMF per lane) | -5.0 dBm to 3.5 dBm |
| Receiver Sensitivity (OMA, MMF) | ≤ -10.5 dBm |
| Extinction Ratio | ≥ 3.5 dB |
| ESD Protection | Excellent |
| Hot Pluggable | Yes |
| TAA Compliance | Yes |
| RoHS Compliance | Yes |
| Warranty | Limited Lifetime Warranty |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
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
