CBO Cable DAC 100G QSFP28 a QSFP (100G-QSFP-QSFP-P-00501) Direct Attach Copper

The CBO DAC Cable 100G QSFP28 to QSFP (100G-QSFP-QSFP-P-00501) Direct Attach Copper provides a fixed, high-bandwidth 100 gigabit link between QSFP28 and QSFP ports. Engineered for short-reach interconnects in data centres and network racks, this passive copper assembly delivers low latency and consistent throughput without the need for optical transceivers or additional power-consuming modules. The cable supports native 100G signaling and is intended for use where compatible QSFP ports are available on servers, switches and similar networking equipment.

Advantages

This DAC cable offers a compact, low-latency connection option with predictable electrical performance over short distances. It reduces total system power consumption compared with active optical solutions, simplifies installation by eliminating transceiver pairing, and provides a cost-effective alternative for dense rack-to-rack and server-to-switch links. The fixed-assembly design ensures mechanical stability and consistent signal integrity when used within its supported reach.

Suitable for

• Server-to-switch 100G links in data centre racks
• Switch-to-switch aggregation or spine connections at short distances
• High-bandwidth top-of-rack (ToR) interconnects where QSFP ports are present
• Environments prioritising low latency and reduced power draw

Key specifications

• Connector types: QSFP28 to QSFP
• Nominal data rate: 100 Gbps
• Cable type: Direct attach copper (DAC), fixed assembly
• Target reach: short-reach links within racks or between adjacent racks
• Application: server, switch and network equipment interconnects supporting QSFP

How to use

Install by inserting each QSFP connector into the corresponding QSFP or QSFP28 port until the latch engages. Ensure both endpoints support 100G over DAC and that ports are powered and configured for the intended link. Avoid excessive bending near the connector and route the cable to prevent strain on the latches. If the cable is passive, no external power or configuration is required beyond standard port setup on connected equipment.

Recommendations

Verify port compatibility and firmware or driver support on network devices before deployment. Observe the manufacturer’s specified maximum bend radius and maximum supported distance for reliable performance. For installations in high-interference environments or longer runs, consider active copper or optical alternatives.