DAC passive copper cable CBO QSFP-4SFP10G-CU1M 1 m for QSFP to 4×SFP+ connections

Passive DAC copper cable CBO QSFP-4SFP10G-CU1M, 1 m length, is a direct-attach copper assembly designed to split a single QSFP port into four SFP+ ports for short-reach, high-density interconnects. The cable provides a low-latency connection without the need for optical transceivers, making it suitable for top-of-rack switches, aggregation switches and server uplinks in data center and rack environments. The fixed copper construction supports reliable electrical signal transmission over a one-metre distance while reducing power draw compared with active optics.

Advantages

This passive DAC cable delivers straightforward installation with no configuration or additional modules required, enabling fast deployment in existing network infrastructures. The integrated QSFP to 4×SFP+ wiring reduces port adapter complexity and saves rack space by eliminating separate transceivers. Passive construction lowers power consumption and heat generation compared with optical solutions, while maintaining low latency for demanding switch-to-switch and switch-to-server traffic.

Suitable for

• Top-of-rack and aggregation switch interconnects
• Server uplinks to switches with QSFP and SFP+ ports
• Short-range, high-density connections in data centres and network racks
• Low-latency switch-to-switch links and clustering

Key specifications

• Connector type: QSFP plug to four SFP+ plugs
• Cable type: Passive direct-attach copper (DAC)
• Length: 1 metre
• Supported link: QSFP to four independent 10 Gbps SFP+ channels
• Latency: Low electrical latency suitable for short-reach connections
• Power: Passive design with reduced power consumption versus optical modules
• Typical use environment: Data centre racks and network equipment rooms

How to use

Install the passive DAC by inserting the QSFP end into the QSFP port of the source device and plugging each of the four SFP+ ends into the corresponding SFP+ ports on the target device. Ensure both devices are powered down or support hot-plugging according to their manufacturer instructions before insertion or removal. No transceiver configuration is required; once connected, the devices should detect the electrical links and establish 10 Gbps channels as supported by the equipment. Verify link status and speed in the switch or server management interface.

Recommendations

Use the cable for short-distance, rack-level connections up to 1 m; avoid routing it through long cable trays or across aisles. Confirm compatibility of the host devices with QSFP-to-4×SFP+ passive copper assemblies and follow vendor guidelines on hot-plug handling, bend radius, and airflow to maintain signal integrity and equipment reliability.