Product Overview
The QSFP-40G-LR4-S is a 40 Gigabit Ethernet QSFP+ optical transceiver designed for long-range data transmission over single-mode fiber (SMF). It supports distances up to 10 kilometers using LC duplex connectors and operates using 4 wavelengths in the 1310 nm band. This module is ideal for high-capacity data center interconnects, enterprise core layers, and carrier network backbones that require reliable, high-speed long-distance connectivity.
Product Details
Compliant with the IEEE 802.3ba 40GBASE-LR4 standard, the QSFP-40G-LR4-S utilizes four 10G lanes (CWDM) on the transmit and receive sides to deliver an aggregated 40 Gbps bandwidth. The module is hot-pluggable and supports Digital Diagnostics Monitoring (DDM), providing real-time monitoring of key operating parameters. It is engineered for power efficiency and optimal signal integrity in demanding 40G Ethernet applications.
Product Features
Supports 40 Gigabit Ethernet over single-mode fiber
Long reach up to 10 km
Four-channel CWDM optical transmission (4 x 10G)
LC duplex connector interface
Low power consumption ≤ 3.5W
Digital diagnostics monitoring (DDM)
Compliant with IEEE 802.3ba 40GBASE-LR4 and QSFP+ MSA
Hot-pluggable QSFP+ form factor
Ideal for data centers and enterprise backbones
Product Specifications
| Specification | Details |
| Form Factor | QSFP+ |
| Data Rate | 40 Gbps (4 x 10G) |
| Wavelength | 4 CWDM channels (1270–1330 nm) |
| Reach | Up to 10 km |
| Fiber Type | Single-Mode Fiber (SMF) |
| Connector Type | LC duplex |
| Power Consumption | ≤ 3.5W |
| DDM Support | Yes |
| Standard Compliance | IEEE 802.3ba (40GBASE-LR4) |
Similar Models Comparison
| Model | Data Rate | Wavelength | Max Reach | Fiber Type | Power Consumption | DDM Support |
| QSFP-40G-SR4 | 40 Gbps | 850 nm (4x10G MMF) | 100 m | MMF | ≤ 1.5W | Yes |
| QSFP-40G-LR4-S | 40 Gbps | 4x CWDM (1310 nm range) | 10 km | SMF | ≤ 3.5W | Yes |
| QSFP-40G-PLR4 | 40 Gbps | 1310 nm | 10 km | SMF | ≤ 2.5W | Yes |
Latest Models Comparison
| Model | Data Rate | Wavelength | Max Reach | Fiber Type | Power Consumption | DDM Support |
| QSFP-40G-LR4-S | 40 Gbps | CWDM (1310 nm band) | 10 km | SMF | ≤ 3.5W | Yes |
| QSFP-40G-LR4-X | 40 Gbps | CWDM (1310 nm band) | 20 km | SMF | ≤ 3.8W | Yes |
| QSFP-40G-LR4-E | 40 Gbps | CWDM (1310 nm band) | 30 km | SMF | ≤ 4.0W | Yes |
