Price list for QSFP28400G optical modules for data center interconnection

400G QSFP-DD optical modules for data center interconnection range from $1,400 for short-reach SR8 modules to over $130,000 for long-haul coherent ZR+ modules, depending on type and vendor.

Price Ranges by Module Type

• SR8 (Short-Reach, in-rack/cross-row): $1,400–$1,800 from reputable third-party vendors. These modules dominate modern data center deployments and are cost-effective for high-density internal connections .
• DR4/FR4 (Medium-Reach, between rows or campus links): Prices are competitive due to a robust third-party ecosystem, generally ranging from $3,000–$6,000 depending on vendor and volume .
• LR4 (Long-Reach, up to 10 km): OEM modules can exceed $10,000, making them a significant budget consideration for DCI deployments .
• ZR/ZR+ (Ultra Long-Haul, coherent optics for wide-area DCI): OEM ZR+ modules can cost over $130,000, while third-party alternatives offer substantial savings, often 60–70% of OEM pricing .

OEM vs Third-Party Considerations

• OEM modules: Preferred for critical 400G/800G production workloads due to guaranteed firmware compatibility and Digital Optical Monitoring (DOM) integration .
• Third-party modules: Offer significant cost savings, especially for ZR/ZR+ coherent optics, but may require careful validation for compatibility with existing infrastructure .

800G QSFP-DD Modules

• Pricing is still stabilizing; third-party 800G modules typically cost 60–70% of OEM list prices. Many enterprises still rely on OEM modules for mission-critical deployments until broader third-party adoption matures .

Wholesale and Online Options

• Vendors like Unitekfiber and QSFPTEK provide 100% compatible 400G QSFP-DD modules with wholesale pricing and technical support for data center applications .
• Online stores offer same-day shipping and compatibility guarantees, which can be useful for rapid deployment or scaling of data center interconnects .

Key Takeaways

• Short-reach SR8 modules are the most cost-effective for in-rack and cross-row connections.
• Medium- and long-reach modules (DR4, FR4, LR4) escalate in price with distance and vendor choice.
• Coherent ZR/ZR+ modules represent the largest line-item expense in DCI networks but offer the highest performance for long-haul interconnects.
• Third-party modules can provide substantial savings, but careful validation is essential for critical deployments. This pricing framework allows data center operators to benchmark costs, plan budgets, and optimize TCO for high-speed optical interconnects.