Description

Farsince 40G QSFP+ passive direct‑attach copper (DAC) integrates two hot‑pluggable QSFP+ ends with a shielded twinax assembly to deliver 4×10G NRZ lanes at 40 Gbps. It connects QSFP+ ports on switches, servers, NICs and storage without separate optics, providing predictable, ultra‑low‑latency links for top‑of‑rack patching, spine/leaf interconnects, HPC clusters and adjacent‑rack runs in data centers. The cable follows QSFP+ MSA mechanics and electrical specs for 40GBASE‑CR4, enabling straightforward deployment across common platforms.

The passive design minimizes power and heat while the 30AWG copper construction controls insertion loss and crosstalk. A 35 mm minimum bend radius supports dense routing, and die‑cast housings with pull‑tab latches allow fast, tool‑free service. Each assembly is hot‑pluggable and fully tested for interoperability. Farsince offers vendor‑specific coding, custom lengths and labeling, and batch test reports to align with your structured cabling and lifecycle requirements.

Specifications

• Product Type: 40G QSFP+ Passive Direct Attach Copper (DAC)
• Host Interface: QSFP+ (4×10G NRZ)
• Device Interface: QSFP+ (4×10G NRZ)
• Cable Direction: QSFP+ to QSFP+
• Max Data Rate: 40 Gbps
• Wire Gauge: 30 AWG
• Cable Structure: Shielded twinax, passive
• Minimum Bend Radius: 35 mm
• Jacket Material: PVC (OFNR)
• Operating Temperature: 0 to +70°C
• Installation: Hot‑pluggable, pull‑tab latch
• Compatibility: IEEE 802.3ba 40GBASE‑CR4; QSFP+ MSA; SFF‑8436
• Power Design: No active components; host 3.3 V for ID, ≤0.5 W
• Compliance: RoHS, REACH
• Customization: Vendor coding, length options, labeling, test reports