DAC cable CBO CBL-QSFP-40GE-PASS-05M-F1 5m Passive — QSFP+ to QSFP+ direct-attach copper, 40Gbps, 5 m

Passive DAC cable CBO CBL-QSFP-40GE-PASS-05M-F1 5m Passive is a 5-meter direct-attach copper assembly with QSFP+ to QSFP+ connectors engineered for 40 Gbps short-range links. It is intended for point-to-point connections between switches, routers and network interface cards inside racks and between adjacent racks, offering low latency and low power consumption compared with active optical solutions. The cable supports standard QSFP+ electrical interfaces and is suitable for data center top-of-rack and server interconnect environments.

Advantages

The passive QSFP+ to QSFP+ construction provides a cost-effective, power-efficient solution for 40Gbps links over short distances. Because it is a direct-attach copper assembly, the cable eliminates the need for separate transceivers and reduces system heat and power draw. Its fixed 5 m length simplifies cable management in rack deployments and ensures consistent electrical characteristics for reliable performance in high-density networking setups.

Suitable for

• Top-of-rack switch interconnects in data centers
• Server-to-switch direct links
• Short-reach high-speed uplinks between adjacent racks
• High-density switch-to-switch connections within the same rack

Key specifications

• Connector type: QSFP+ to QSFP+
• Data rate: 40 Gbps aggregate
• Length: 5 meters
• Cable type: Passive direct-attach copper (DAC)
• Typical use: Short-range, high-speed electrical interconnect

How to use

Install the cable by inserting each QSFP+ connector firmly into the corresponding port on network devices until the latch engages. Ensure both devices are powered down or follow hot-plug guidelines from the equipment vendor if supported. Verify link status through device management interfaces or LEDs after connection. Route the cable to avoid sharp bends and maintain bend radii recommended by the equipment manufacturer to preserve signal integrity and mechanical reliability.

Recommendations

Use this passive DAC for short-distance 40Gbps links inside racks or between adjacent racks where cost and power efficiency are priorities. Avoid using the cable in environments that exceed the manufacturer's specified operating temperature range or expose it to mechanical strain; keep connections dust-free and handle QSFP+ connectors by their housings to prevent damage.