400GBASE-SR4 QSFP-DD PAM4 850nm 100m DOM Transceiver Module (SMF, 850nm, 100m, MTP/MPO, DOM)
The 400GBASE-SR4 module supports link lengths of up to 100m over parallel OM4 multimode fiber (MMF) with an MTP/MPO-12 connector. It is compliant with the IEEE 802.3df-2024 and 400GAUI-8 standards. The 400 Gigabit Ethernet signal is transmitted over four parallel optical lanes operating at 100G PAM4 per lane.
| Part Number | QDD-400G-SR4 | Vendor Name | Connlight |
| Form Factor | QSFP-DD | Max Data Rate | 400Gbps |
| Wavelength | 850nm | Max Cable Distance | 100m |
| Connector | MTP/MPO-12 | Modulation Format | PAM4 |
| Transmitter Type | VCSEL 850nm | Receiver Type | PIN |
| Electric Signal | 8x50G | Optical Signal | 4x100G |
| Media | MMF | DDM/DOM | Supported |
| TX Power | -4.6~4dBm | Minimum Receiver Power | -6.4dBm |
| Power Consumption | <12W | Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | QSFP-DD MSA Compliant | Application | 400GBASE Ethernet |
Quality Assurance
Excellent quality is the foundation of Connlight’ s survival and development. Our operation team are experts with many years’ experiences in optical communication industry. Our manufacturers are first-class manufacturers in the industry. Many of them have the qualification of OEM for first-class system equipment manufacturers.
Quality Certification
We control the quality of our products, including our strict qualification of manufacturers, quality control process and production technology, and compliance with certification and safety standards. At present, our products meet the industry standards and mainstream quality certification, such as ISO 9001, CE, RoHS, FCC, etc.

Comprehensive Testing
Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.

