DAC Cable Digitus 100G QSFP28 1m AWG 30

The Digitus 100G QSFP28 DAC cable is a 1 m AWG30 passive copper direct attach cable with QSFP28 connectors on both ends, designed for short-reach, high-speed interconnects. It supports an aggregate data rate of 100 Gb/s (4 × 25 Gb/s) and complies with SFF-8665 and 100GBASE-CR4 specifications. The cable uses four high-speed copper pairs and a single +3.3 V power supply, making it suitable for connections between switches, storage systems and high-performance computing equipment in data centre environments.

Advantages

This 100G QSFP28 to QSFP28 DAC provides a low-latency, low-power and cost-effective solution for short-distance links. Its AWG30 twinax construction and compliance with SFF-8665 ensure reliable signal integrity at channel data rates up to 28.3125 Gbps per lane. As a passive copper cable, it requires no active electronics or external power beyond the host +3.3 V supply and is compatible with a wide range of network equipment vendors.

Suitable for

• Data centre switch-to-switch interconnects
• Short-reach server and storage connections
• High-performance computing clusters
• Top-of-rack and spine network links

Key specifications

• Connector type: QSFP28 to QSFP28
• Length: 1 m
• Cable type: Passive twinax copper
• Wire gauge: AWG 30
• Aggregate data rate: 100 Gb/s (4 × 25 Gb/s)
• Channel data rate: 28.3125 Gbps
• Standards: SFF-8665, 100GBASE-CR4
• Power supply: Single +3.3 V

How to use

Insert each QSFP28 connector into the corresponding QSFP28 port on the devices to be linked, ensuring proper alignment and a secure mechanical fit. The passive DAC requires no additional configuration; the connected devices should detect the link and negotiate the appropriate speed automatically. Use the cable for short-reach connections within racks or between adjacent racks according to your data centre layout and vendor compatibility guidelines.

Usage recommendations

For reliable operation, avoid excessive bending and tensile stress on the AWG30 twinax cable, and follow vendor compatibility lists when mixing equipment from different manufacturers. Use this passive 100G QSFP28 DAC for short-distance links where copper direct attach cabling meets latency, power and cost requirements.