Product Overview
The QSFP 40G SR4 is a high-speed optical transceiver module designed for 40 Gigabit Ethernet short-reach applications over multimode fiber. It operates at an 850 nm wavelength using four independent full-duplex channels, each capable of 10 Gbps, delivering an aggregate bandwidth of 40 Gbps. The module supports transmission distances of up to 100 meters on OM3 and 150 meters on OM4 multimode fiber, making it ideal for data center interconnects, top-of-rack switching, and enterprise backbone links.
Product Details
| Attribute | Description |
| Product Name | QSFP 40G SR4 |
| Form Factor | QSFP+ |
| Data Rate | 40 Gbps (4 x 10 Gbps) |
| Wavelength | 850 nm |
| Interface Type | MPO/MTP multimode connector |
| Fiber Type | Multimode Fiber (OM3/OM4) |
| Max Distance | 100 m (OM3), 150 m (OM4) |
| Operating Temperature | 0C to 70C |
| Digital Diagnostics | Yes |
| Compatibility | IEEE 802.3ba 40GBASE-SR4 |
| Application | Data centers, high-performance computing, cloud networking |
Key Features
4-channel full-duplex transceiver module
Total 40 Gbps aggregate bandwidth over multimode fiber
Transmission distance up to 150 meters on OM4
MPO/MTP optical connector for high-density cabling
Hot pluggable QSFP+ form factor
Digital diagnostics monitoring (DDM) support
Low power consumption and high port density
Ideal for 40G Ethernet backbone and aggregation links
Technical Specifications
| Specification | Value |
| Form Factor | QSFP+ |
| Data Rate | 40 Gbps |
| Transmission Distance | 100 m (OM3), 150 m (OM4) |
| Wavelength | 850 nm |
| Connector Type | MPO/MTP |
| Fiber Type | Multimode Fiber (MMF) |
| Transmit Power Range | –7.5 dBm to 0 dBm |
| Receive Sensitivity | –9.5 dBm |
| Operating Temperature | 0C to 70C |
| Voltage Supply | 3.3V |
Similar Models Comparison
| Model Name | Data Rate | Wavelength | Fiber Type | Max Distance | Interface |
| QSFP 40G SR4 | 40 Gbps | 850 nm | MMF | 150 m | MPO |
| QSFP 40G LR4 | 40 Gbps | 1310 nm | SMF | 10 km | LC |
| QSFP 40G PSM4 | 40 Gbps | 1310 nm | SMF | 500 m | MPO |
| QSFP 40G ER4 | 40 Gbps | 1310 nm | SMF | 40 km | LC |
| QSFP 40G BiDi | 40 Gbps | 850 nm | MMF | 100 m | LC |
