Description

Farsince 400G OSFP‑to‑OSFP flat‑top DAC is a twinax assembly for copper direct‑attach connections between OSFP‑400G ports. It carries eight 50G PAM4 lanes (400GAUI‑8) and provides a cost‑efficient alternative to optics for top‑of‑rack or rack‑to‑rack hops in data centers, HPC and AI clusters. The flat‑top OSFP housing fits platforms with cage‑integrated heat sinks and tight front‑panel spacing, aiding airflow and cable clearance without compromising mechanical robustness.

With passive construction, the link adds virtually no latency and draws only minimal management power. Controlled‑impedance pairs, full shielding and molded strain relief deliver low insertion loss and crosstalk, while a 40.5 mm minimum bend radius simplifies routing in dense racks. The assembly is hot‑pluggable and interoperable with OSFP MSA mechanics, CMIS management and IEEE 802.3cd electrical specifications. Farsince supports project‑specific coding, custom lengths and labeling, and supplies batch test reports for streamlined deployment.

Specifications

• Product Type: 400G Passive Direct Attach Copper Twinax
• Form Factor: OSFP to OSFP, Flat‑Top housing
• Data Rate: 400 Gbps aggregate (8×50G PAM4)
• Wire Gauge: 28 AWG
• Cable Structure: Shielded twinax, passive copper
• Minimum Bend Radius: 40.5 mm
• Modulation: PAM4 (400GAUI‑8)
• Power Design: Passive; ≤0.1 W per end for ID/CMIS
• Installation: Hot‑pluggable OSFP with pull‑tab latch
• Application: In‑rack/adjacent‑rack 400G Ethernet switch or router links
• Operating Temperature: 0 to +70°C
• Jacket Material: PVC (OFNR)
• Compatibility: OSFP MSA, CMIS Rev 4.0, IEEE 802.3cd
• Compliance: RoHS, REACH
• Customization: Lengths, vendor coding and labeling available