400G QSFP-DD-DAC Passive Direct Attach Cable

Short Description:
Short Description:

Item: 400G QSFP-DD to QSFP-DD Passive direct attach cables

Data rate: 400Gbps

Operating Temperature: 0 to 70℃

Wire gages range: 28AWG to 30AWG

  • Brand Name: Rollball
  • Min.Order Quantity: 1 Piece
  • Place of Origin: Shenzhen, China
  • Payment Terms: Paypal, Western Union, T/T
  • Certification: FCC, CE, RoHS

QSFP-DD Cable Assemblies



QSFP-DD(Double-Density) passive copper cable assemblies double the number of high 25G/lane NRZ and 50G/lane PAM4 when compared to the existing 100G QSFP cabling systems from 4 to 8 lanes. The QSFP-DD cables enable 200G or 400G in application lengths from 0.5 meter up to and including 2.5 meter in lengths.



  1. Configurable & flexible
  2. Backwards plug capability to 100G; seamless transition to future higher aggregate bandwidth
  3. Optimized PCB interface board with auto soldering process
  4. I/O system has 10-12 watt single port dissipative heat capacity
  5. Assembled with industry leading twin-axial SKEWCLEAR® 8-pair or 16-pair wire
  6. EEPROM in cable assembly
  7. Passive copper length to 2.5 meter
  8. Compatible with existing 100G QSFP based connector ports (with heat sinks and / or light pipes) as well as 200G / 400G ports
  9. RoHS2 compliant
  10. Custom solutions supported



  1. 200G or 400G aggregate bandwidth capacity, dual 8-pair or single 16-pair wire supported
  2. Addresses current and future market desired bandwidth port capability requirements
  3. Exceeds 25G NRZ and 50G PAM4 performance and SI parameter in standard specification
  4. Enables use of copper and optical based cabling solutions
  5. Great SI reliability and physical capabilities (softer and better bending performance than other cables)
  6. Programmable to customer requirements
  7. Provides optimized cost, performance, cable bulk & routing solutions
  8. Meets industry standard signal performance requirements up to lengths of 2.5 meters
  9. Assured cable pluggability regardless of port bandwidth configuration
  10. Environmentally friendly
  11. Custom solutions from adapter cables to loopback cables and beyond


  1. Thermal Shock: EIA 364-32, Condition 1, 25 cycles, -55°C to +85°C
  2. Service life to exceed 5 years at 65°C



  1. RoHS2 Compliant



  1. Refer to the latest revision of the QSFP-DD hardware specification for QSFP double density 8X pluggable transceiver
  2. Applicable IEEE specifications IEEE802.3by and IEEE802.3bs
  3. The InfiniBand™ architecture specification and annexes



Item Description
RQSFPDD-400G-CU0.5M 400G QSFP-DD-DAC Passive Direct Attach Cable 0.5m, 0-70degree
RQSFPDD-400G-CU1M 400G QSFP-DD-DAC Passive Direct Attach Cable 1m, 0-70degree
RQSFPDD-400G-CU2M 400G QSFP-DD-DAC Passive Direct Attach Cable 2m, 0-70degree
RQSFPDD-400G-CU2M 400G QSFP-DD-DAC Passive Direct Attach Cable 3m, 0-70degree