Direct Attach Cable BlueOptics QSFP-DD to QSFP-DD 400 Gb 720-087756

Direct Attach Cable BlueOptics QSFP-DD to QSFP-DD 400 Gb 720-087756 is a passive copper twinax assembly with QSFP-DD connectors on both ends engineered for short-reach 400 Gigabit links in data center environments. The cable provides a direct QSFP-DD to QSFP-DD connection for switches, routers and server NICs that support 400 Gb interconnects, enabling compact and low-latency links where fibre transceivers are not required. It is intended for high-density racks and top-of-rack or spine-leaf topologies that rely on short-distance, high-throughput connectivity.

Advantages

This passive direct attach cable delivers a cost-effective and power-efficient alternative to optical modules for short-reach 400 Gb connections. With QSFP-DD connectors on both ends it supports high-density deployment and simplifies cabling between adjacent ports. The copper construction reduces transceiver power consumption and latency compared with optical solutions for short distances while maintaining full 400 Gb data rates. The assembly’s mechanical design ensures reliable mating and consistent signal integrity across supported short-reach links.

Suitable for

• Short-reach connections between QSFP-DD ports in top-of-rack switches and aggregation switches
• Direct server-to-switch links for 400 Gb network interface cards (NICs)
• High-density patching panels and spine-leaf data center fabrics requiring 400 Gb channel capacity

Key specifications

• Connector type: QSFP-DD to QSFP-DD
• Data rate: 400 Gigabit per second
• Medium: Passive copper twinax
• Typical reach: short-reach data center distances (direct attach)
• Form factor compatibility: QSFP-DD ports on switches, routers and NICs

How to use

Insert each QSFP-DD connector firmly into compatible QSFP-DD ports on the devices to be linked, ensuring connectors latch securely. Verify that both devices support passive direct attach copper assemblies at 400 Gb and confirm port configuration in device firmware or management software if necessary. Do not force connectors; align the keyed mating faces before seating. For proper operation, use the cable within recommended short-reach distances and avoid tight bends or sharp kinks that could damage the cable assembly.

Usage recommendations

Use this direct attach cable in short-distance, high-density data center runs where 400 Gb bandwidth is required and where a passive copper solution offers lower cost and power than optical modules. Store and install the cable in environments free from excessive mechanical stress and follow equipment vendor guidance for QSFP-DD port handling.