How much does a 40G optical module cost

The price of 40G QSFP+ optical modules ranges from approximately $40 for compatible short-reach SR4 modules to over $1,000 for branded long-reach LR4 or specialized modules.

Price Ranges by Module Type

• 40G SR4 (Short-Reach, MMF, 150m): Compatible or third-party modules typically cost $40–$150, while OEM-branded modules from vendors like Cisco, Juniper, or Arista may be higher, depending on certification and warranty . These modules use MTP/MPO connectors and are ideal for data center interconnects over OM3/OM4 fiber .

• 40G LR4 (Long-Reach, SMF, 10km): Prices for compatible LR4 modules generally start around $200–$400, while OEM-branded LR4 modules can reach $500–$1,000+. These modules use LC duplex connectors and WDM technology to combine four 10G wavelengths on a single fiber pair .

• 40G ER4 (Extended-Reach, SMF, 40km): ER4 modules are more specialized and expensive, with prices often exceeding $800–$1,000+ for OEM units. They are used for longer-distance interconnects between data centers or metro networks .

• 40G CSR4 (Cost-Effective Short-Reach, 300m): These modules are designed for parallel optical transmission with 12-fiber MTP/MPO interfaces and are highly cost-effective, typically priced in the $50–$150 range .

Factors Affecting Price

1. Brand and Certification: OEM-branded modules (Cisco, Juniper, Arista) are more expensive due to vendor certification, warranty, and guaranteed compatibility. Compatible third-party modules are significantly cheaper.
2. Transmission Distance: Longer-reach modules (LR4, ER4) require more complex optics and WDM technology, increasing cost.
3. Fiber Type: Single-mode fiber modules (SMF) are generally pricier than multi-mode fiber (MMF) modules.
4. Special Features: Modules with digital diagnostics monitoring (DDM), extended temperature ranges, or breakout capabilities may carry additional premiums.

Summary

For budget-conscious deployments, compatible 40G SR4 modules are the most cost-efficient option at $40–$150, suitable for short data center links. For longer distances or vendor-certified networks, LR4 and ER4 modules range from $200 to over $1,000 depending on brand and specifications . This pricing guidance helps in planning procurement and total cost-of-ownership for 40G network upgrades.