Direct Attach DAC cable CBO LSWM1QSTK05 0.5 m QSFP passive

CBO LSWM1QSTK05 is a 0.5 m QSFP Direct Attach (DAC) cable designed for short-range, high-bandwidth interconnects. As a passive copper assembly, the cable delivers low-latency, energy-efficient links between QSFP ports on switches, servers and storage systems. Its fixed 0.5 m length and QSFP connector interface simplify rack-level connectivity where reliable 40Gb/100Gb-class performance is required.

Advantages

The passive QSFP DAC design offers reduced power consumption compared with active optical transceivers and minimizes protocol overhead for latency-sensitive applications. The short, factory-molded assembly provides consistent signal integrity without the need for separate transceivers, reducing component count and simplifying inventory. Robust connector housings and a durable cable jacket make it suitable for dense rack environments and repeated insertions.

Suitable for

• Short-range QSFP-to-QSFP connections inside racks
• Switch-to-switch, server-to-switch and server-to-storage links
• High-density data center top-of-rack and middle-of-row deployments
• Low-latency networking for virtualization and storage clusters

Key specifications

• Connector type: QSFP (Quad Small Form-factor Pluggable)
• Cable type: Passive copper twinax assembly
• Length: 0.5 m (fixed)
• Supported link classes: 40Gb and 100Gb topology compatibility
• Latency: low, suitable for latency-sensitive applications
• Power: passive design with minimal power draw
• Operating environment: intended for data center and rack use

How to use

Insert each QSFP connector into the corresponding QSFP port on the network devices until the connector latches. Ensure both devices are powered and configured to accept 40Gb/100Gb direct attach links. Verify link status through the device management interface and monitor for proper negotiation and error-free operation. For correct airflow and cable management, route the 0.5 m cable without sharp bends and avoid excessive strain on the connectors.

Recommendations

Use this passive DAC for short, fixed-length connections within the same rack or adjacent racks. Avoid using it for distances beyond its specified length or in environments with significant electromagnetic interference. For environments requiring longer runs or fiber-based isolation, consider active or optical transceiver solutions.