BLUELAN Compatible Amphenol NJAAKK-0001 QSFP112 Direct Attach Cable, 400GBASE-CR4, Infiniband, 1 Meter (NJAAKK-0001-BL)

In high-density data centers and HPC clusters, network architects need a reliable 400G link that fits tight spaces. The BLUELAN NJAAKK-0001-BL is a passive copper direct attach cable with QSFP112 connectors on both ends, built to deliver 400GBASE-CR4 Ethernet or Infiniband connectivity over a 1-meter span. It is a compatible replacement for the Amphenol NJAAKK-0001, matching its form factor and performance without the premium price.

Key specifications

• Data rate: 400 Gbps
• Cable type: Direct Attach Copper (DAC)
• Connectors: QSFP112 to QSFP112
• Length: 1 meter
• Ethernet standard: 400GBASE-CR4
• Protocol support: Ethernet, Infiniband
• Transceiver type: Passive copper
• Number of lanes: 4
• Impedance: 100 Ohm
• Power consumption: < 0.5 W
• Operating temperature: 0°C to 70°C
• Voltage supply: 3.3 V

Why choose it

This DAC cable is hot-pluggable and draws minimal power, helping to keep rack energy budgets low. Its passive design means no active electronics, reducing latency and failure points. The QSFP112 interface is designed for next-generation 400G switches and NICs, making it a straightforward path to higher bandwidth.

Ideal use cases

• Top-of-rack to server connections in 400G Ethernet fabrics
• Infiniband HDR/NDR links in HPC clusters
• Short-reach interconnects between switches or storage nodes
• Lab validation and testing of 400G equipment

Good to know

Because it is a passive copper cable, the maximum reach is limited to 1 meter as specified. It is intended for intra-rack or adjacent-rack use. The cable is compatible with any QSFP112 port that follows the 400GBASE-CR4 standard.