DAC cable Digitus QSFP28 100G 3m Cable length 3m Connector QSFP28

The Digitus QSFP28 100G DAC cable (3 m, AWG 26) provides a direct-attach copper connection between QSFP28 ports for short-reach 100 Gigabit Ethernet links. Compliant with 100GBASE-CR4, the cable contains four high-speed copper pairs, each supporting up to 25 Gb/s, and uses QSFP28 to QSFP28 connectors to link switches, storage systems and other high-density networking equipment in data centers and enterprise environments.

Advantages

This 100G QSFP28 DAC cable offers a low-cost, power-efficient solution for short-distance interconnects. The AWG 26 twinax construction ensures reliable signal integrity for 4 × 25 Gb/s lanes while avoiding the need for separate transceivers. Its QSFP28 to QSFP28 form factor simplifies deployment in racks and spine/leaf topologies where direct copper links are appropriate.

Suitable for

• Data center top-of-rack and spine connections
• Enterprise storage system interconnects
• High-performance computing clusters
• Short-reach switch-to-switch links

Key specifications

• Connector type: QSFP28 to QSFP28
• Maximum aggregate data rate: 100 Gb/s (4 × 25 Gb/s)
• Cable length: 3 m
• Cable gauge: AWG 26 twinax
• Standard: 100GBASE-CR4 compliant
• Brand / MPN / EAN: DIGITUS / DN-81603 / 4016032481096

How to use

Insert each QSFP28 connector into compatible QSFP28 ports on the devices to be connected, ensuring proper alignment and full seating. Use the 3 m DAC to connect adjacent racks or equipment within the same rack where short-reach copper interconnects are supported. Verify link status on connected devices and ensure port settings match the expected 100G operation.

Recommendations

For optimal performance, use this AWG 26 QSFP28 DAC for links within the recommended short-reach distance (3 m) and avoid bending the cable beyond the manufacturer’s minimum bend radius. Choose DACs when direct, cost- and power-efficient connections are acceptable and when both ends support QSFP28 direct-attach copper links.