MSA-compliant 200G QSFP56 and QSFP-DD transceivers for AI/ML clusters and hyperscale data center aggregation. PAM4, SR4 and LR4 variants. Made in Taiwan by Coretek Opto.
Last updated June 2026
Request a Quote200G transceivers bridge the gap between the established 100G tier and the emerging 400G infrastructure. The primary form factors are QSFP56 (4×50G PAM4 lanes) and QSFP-DD (Dual Density, capable of 200G in 2×100G or 4×50G configuration). QSFP56 maintains mechanical backward compatibility with QSFP28 cages, operating at 100G in those ports. QSFP-DD is a larger form factor — QSFP-DD cages accept QSFP28 modules, but QSFP-DD modules require a QSFP-DD cage.
QSFP56 uses the same QSFP housing as QSFP28 and QSFP+ but drives each of the four electrical lanes at 50 Gbps using PAM4 modulation, achieving 200 Gbps total.
In QSFP56-capable cages the module negotiates at 200G. In QSFP28 cages, some switch platforms may operate the module at 100G — verify backward compatibility with your switch vendor before ordering.
Reach options for 200G include SR4 (multimode, up to 100 m on OM4) and LR4 (10 km on single-mode). QSFP-DD at 200G supports the same physical reach as QSFP56 while also serving as a migration path toward 400G with a simple optic swap.
200G is used in hyperscale data center aggregation layers, high-performance AI and machine learning cluster interconnects, and as an intermediate upgrade step for operators moving from 100G to 400G infrastructure. For teams building GPU clusters for AI/ML training, 200G NICs and switches from Mellanox/NVIDIA and Intel often require QSFP56 or QSFP-DD 200G optics for node-to-node spine connectivity.
| Form Factor | Data Rate | Description | Optics | Distance | Connector | Temp | |
|---|---|---|---|---|---|---|---|
| QSFP28-DD | 200 Gb/s | 200G QSFP28-DD | 850nm / MMF | 100m | MPO-16 | C | Get Quote → |
| QSFP28-DD | 200 Gb/s | 200G QSFP28-DD | CWDM / SMF | 2km | CS | C | Get Quote → |
| QSFP28-DD | 200 Gb/s | 200G QSFP28-DD | CWDM / SMF | 10km | CS | C | Get Quote → |
| QSFP28-DD | 200 Gb/s | 200G QSFP28-DD | LWDM / SMF | 10km | LC | C | Get Quote → |
| QSFP28-DD | 200 Gb/s | 200G QSFP28-DD | LWDM / SMF | 40km | LC | C | Get Quote → |
| QSFP56 | 200 Gb/s | 200G QSFP56 | 850nm / MMF | 100m | MPO-12 | C | Get Quote → |
| QSFP56 | 200 Gb/s | 200G QSFP56 | CWDM / SMF | 2km | LC | C | Get Quote → |
| QSFP56 | 200 Gb/s | 200G QSFP56 | CWDM / SMF | 10km | LC | C | Get Quote → |
C = Commercial (0°C to 70°C) · I = Industrial (−40°C to 85°C)