400G QSFP-DD ER8 40km Optical Transceiver – APX-QSFP-DD-400G-40km-ER8
Product Overview
The Apex APX-QSFP-DD-400G-40km-ER8 is a 400G QSFP-DD ER8 optical transceiver engineered for high-density data center and telecom networks. It transmits up to 40km over single-mode fiber (SMF), delivering dependable 400G connectivity for modern AI and cloud infrastructure.
Built in a QSFP-DD form factor with an MPO-16 optical interface, the APX-QSFP-DD-400G-40km-ER8 aggregates 8 x 50G PAM4 electrical lanes into a single hot-pluggable module. 1310nm EML transmitters paired with APD receivers extend the reach to 40km over single-mode fiber. It is compatible with major networking platforms and supports plug-and-play deployment in existing racks.
Engineered for 400G switching and transport fabrics, this transceiver delivers consistent optical performance with low power consumption and full digital diagnostics for scalable, serviceable network infrastructure.
Key Features
- 400G high-speed optical transmission
- QSFP-DD pluggable form factor
- Up to 40km transmission distance
- ER8 optical technology
- 1310nm wavelength operation
- 8 x 50G PAM4 electrical lanes
- Digital Diagnostic Monitoring (DDM/DOM) supported
- Compatible with major networking platforms
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-QSFP-DD-400G-40km-ER8 |
| Manufacturer | Apex |
| Data Rate | 400G |
| Form Factor | QSFP-DD |
| Optical Technology | ER8 |
| Maximum Reach | 40km |
| Wavelength | 1310nm |
| Fiber Type | Single Mode Fiber (SMF) |
| Connector Type | MPO-16 |
| DDM / DOM | Supported |
| Compliance | QSFP-DD MSA, RoHS |
Applications
🖥️ Data Center Spine-Leaf Fabric
Optimized for modern spine-leaf data center architectures, providing high-density optical interconnect between leaf and spine switches.
☁️ AI and Cloud Infrastructure
Supports the bandwidth demands of AI training clusters, cloud computing platforms and large-scale data processing environments.
📦 High-Density Rack Deployment
The hot-pluggable form factor and low power consumption enable high port density in space-constrained data center racks.
Compatibility
Apex optical transceivers are engineered for interoperability with major networking equipment platforms, including Cisco, Juniper, Arista, Huawei, HPE, Dell and other industry-leading systems. Each module is coded for the target switch platform before shipment.
Frequently Asked Questions
What is the Apex APX-QSFP-DD-400G-40km-ER8?
The Apex APX-QSFP-DD-400G-40km-ER8 is a 400G QSFP-DD optical transceiver with ER8 optics, supporting transmission distances up to 40km.
What applications use 400G QSFP-DD optical modules?
These modules are commonly deployed in 🖥️ Data Center Spine-Leaf Fabric, ☁️ AI and Cloud Infrastructure, 📦 High-Density Rack Deployment.
Is the module compatible with third-party switches?
Yes. Apex optical modules support OEM-compatible coding and are tested for interoperability with widely used networking platforms.
What warranty does Apex provide?
Apex provides a 3-year warranty on all optical transceivers. Each module undergoes strict optical performance, compatibility, and reliability testing before shipment.
Why Choose Apex
- In-house engineering support and flexible manufacturing capacity from 1.25G to 800G.
- Every module is tested for optical performance, interoperability and reliability before shipment.
- Standards-based MSA design with digital diagnostics for plug-and-play deployment.
- Backed by a 3-year warranty and responsive technical support.
