40G Direct Attach Cable


The 40G DAC; QSFP-40G-DAC-PxM direct attach copper cable assembly (also known as DAC) is suitable for very short distances and offers a highly cost-effective way to establish a 40 Gigabit link connectivity between devices using QSFP ports. The QSFP+ DAC cable is designed for 40Gb/s high-speed interconnecting networking applications such as high-performance computing (HPC), enterprise networking including top-of-rack switching and network storage markets.

SKU: QSFP-40G-DAC-PxM Category:


The QSFP-40G-DAC-P3M fully complies with QSFP+ Multi-Source Agreement (MSA) standards SFF-8436 and IEEE 802.3ba 40GBASE-CR4. It is developed specifically as a cost-effective and lower-power alternative to QSFP+ optical transceivers and QSFP+ active optical fiber (QSFP+ AOC).


• Lower cost than QSFP+ optical transceiver and active optical cable (AOC)
• Maximum aggregate data rate: 40 Gb/s (4 x 10Gb/s)
• Hot-pluggable QSFP+ 38-PIN footprint
• Single 3.3V power supply
• Compliant with IEEE 802.3ba 40GBASE-CR4 standard
• Compliant with QSFP+ MSA SFF-8436
• Compliant with Infiniband QDR/DDR data rates
• Maximum 1.5W operation power
• Operating temperature range: 0 to 70°C
• RoHS Compliant and Lead-Free


  Product Series Direct Attach Copper Twinax Cable   Optcore Part Number QSFP-40G-DAC-P3M
  Form Factor QSFP+ DAC Cable   Data Rate 40Gb/s
  Passive or actively equalized  Passive   Supply Voltage 3.3V
  Cable Length 3 meter (9.8 ft)   Cable impedance 100 Ω
  Cable Type Twinax   Wire Gauge 26 AWG
  Minimum cable bend radius 40 mm   Cable Jacket Type PVC
  Connector QSFP+/QSFP+   Digital Diagnostic Monitoring N/A
  Environment Operating: 0°C to 70°C
Storage: -40°C to 85°C
  Weight 0.34 kg
  Application 40GbE and high-density 10GbE interconnects
Datacom/Telecom switch & router connections
Data aggregation and backplane applications
Proprietary high-speed Interconnections
Infiniband Connectivity SDR/DDR/QDR
Data center cabling infrastructure
  Compliance IEEE802.3ba
InfiniBand SDR/DDR/QDR
Fibre Channel/Fibre Channel over Ethernet (FCoE)

Additional information

Weight N/A
Dimensions N/A
DAC Length



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