Approved Networks Dell/Mellanox 40GBASE QSFP+ Passive DAC Cable (QSFP+ to QSFP+) Multi-Vendor Length Required

A passive DAC cable carries an Ethernet signal over a short length (typically under five meters) of copper with no additional components to boost the signal. The host networking equipment must support the signal processing functions for a passive DAC to work. When a DAC is inserted, networking gear that is compatible with passive DACs reads the module type so the signal conditioning can be activated. Today, 98% of the market utilizes passive DACs for transmissions of seven meters and under, but this depends on the data rate.

40GBase-CR4, 100% Compatible QSFP+ Multi-Vendor DAC (Direct Attach Copper) Cable, Passive

Benefits

Lower Price

• Significant savings over short-range optical transceiver solutions

Lower Power

• DACs' cooling requirements are relaxed due to their thermal design. This lowers power consumption and decreases data center operating expenses
• SFP+ SR optical transceiver = 1 W
• Passive DAC ‹ 0.1 W

Increased Reliability

Fewer components provide more consistent transmission performance. They are pre-terminated, factory assembled, and fully tested. A DAC does not produce heat, making it a more versatile product that can be used in wider temperature ranges.

Lower Latency

• Multi-Mode Fiber (MMF) and Sigle-Mode Fiber (SMF) = 4.96 ns per meter
• Passive DAC = 4.60 ns per meter

Time

• Plug and play means no time is wasted inspecting connections or cable components
• Quick and easy installation for data center technicians

DATA SHEET