Reef Optics
NVIDIA Mellanox QSFP-LX4-40G Compatible 40GBase-LX4 QSFP+ 1310nm 150m MMF / 2km SMF LC DOM - Reef Optics
PO and Net 30 available for schools, government, hospitals, and law firms.
Description
Description
Reef Optics 40GBase-LX4 QSFP+ Transceiver — NVIDIA Mellanox QSFP-LX4-40G Compatible
Upgrade your 40G network with this high-performance QSFP+ optical transceiver module, fully compatible with NVIDIA Mellanox switches, routers, and NICs. Designed as a cost-effective, drop-in replacement for the genuine Mellanox QSFP-LX4-40G, this module delivers reliable 40GbE connectivity for data centers, enterprise core networks, and high-performance computing environments.
Key Specifications
- Data Rate: 40Gbps (4x 10.3125Gbps CWDM channels)
- Wavelength: 1271nm, 1291nm, 1311nm, 1331nm (CWDM)
- Fiber Type: MMF (OM3/OM4) up to 150m | SMF (OS2) up to 2km
- Connector: Duplex LC
- Form Factor: QSFP+ (hot-swappable)
- DOM/DDM: Digital Diagnostic Monitoring supported
- Standards: IEEE 802.3ba 40GBASE-LX4, QSFP+ MSA, XLPPI compliant
- Compatibility: NVIDIA/Mellanox (also cross-compatible with MC2210511-LX4)
Why Choose Reef Optics?
- Industry-leading 10-year warranty on all Reef Optics transceivers
- Free shipping on orders over $300
- 100% tested for compatibility and performance before shipping
- MSA-compliant — will not void your equipment warranty
Ideal for 40G Ethernet uplinks, data center interconnects, campus backbone links, and anywhere you need flexible multimode and single-mode fiber support from a single transceiver module.
Specs & Details
Specs & Details
Shipping & Warranty
Shipping & Warranty
Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.
All products include our industry-leading 10 Year Warranty backed by Reef Telecom.

We clean up after ourselves.
Ecommerce deliveries have a carbon footprint. That's why we support verified projects that remove carbon from the air.
Every delivery’s carbon footprint is calculated based on weight, shipping method, and distance traveled. We neutralize these emissions by purchasing verified carbon removal credits from groundbreaking projects.
With your purchase, you’ll join a community of proactive merchants and customers dedicated to a sustainable future. Together, we've removed emissions for over 80 million deliveries and removed over 56 thousand tonnes of carbon.
We work with a network of pioneering carbon removal companies that have been vetted by the commerce platform Shopify.
Reef Telecom Proudly Supports
-
Ocearch
2026 Monthly Shark Hero -
Coral Restoration Foundation
2025 Staghorn Donor -
Ocean Conservancy
2025 Donor
Smart IT. Clean Oceans. Boundless Possibilities.
Our goal is providing the highest quality refurbished equipment to promote environmentally-conscious equipment usage through it's lifecycle.