QSFP56 Active DAC Cable

Volex’s QSFP56 active Direct Attach Copper cable features 4 transmitting and 4 receiving 50Gbps PAM-4 channels. The cable assembly meets 50G and 200G Ethernet and InfiniBand High Data Rate (HDR) specifications. The Volex QSFP56 active DAC enhances Signal Integrity severely stressed under high-speed data rate through advanced linear equalization. The result is up to 9M reach vs. max 3M reach for the passive version and smallest cable size and highest flexibility.

As next-gen data centres deploy faster speed in a tighter space, they need high performance cables that reduce power consumption, provide reliable operation and are low cost. The Volex QSFP56 active DAC is designed to meet the next-gen data centre needs and, at less than 150mW per active channel, is a cost-effective alternative to the high-power consumption Active Optical Cable.

QSFP56 Active DAC Cable Product Highlights

  • Low power consumption and heat dissipation
  • Complete cable assembly uniquely terminated at the factory to provide the most reliable operation
  • 100% tested for signal integrity with serial number traceability

QSFP56 Active DAC Cable Features and Specifications

Product Type QSFP56 to QSFP56 active copper direct attach copper cable
Conductor Treatment Laser stripped conductors
Cable Type High-speed twinax cable, 8-pair differential, 100 +/-5 ohms
Cable Colour Black
Cable Jacket PVC
Packaging PE bag
Power Supply Voltage 3.3V
Power Consumption <150mW per active channel
Temperature Range 0 – 70o C
Retention Force Minimum 125N per SFF-8661
Insertion Force Maximum 60N per SFF-8661
EEPROM Each connector module contains an EEPROM to provide product information to the host system
Cable Termination 100% factory tested including comprehensive signal integrity verification and serial number traceability using advanced Manufacturing Execution Systems
Volex reserves the right to change specifications and availability without prior notice.

QSFP56 Active DAC Cable Applications

  • Switches, Servers, Routers, Storage Arrays
  • Networking Equipment
  • Data Centres
  • Telecom Central Offices (CO)
  • Test and Measurement Equipment

Standards Compliance of QSFP56 Active DAC Cable

  • IEEE P802.3cd
  • InfiniBand HDR
  • SFF-8665, SFF-8661, SFF-8679, SFF-8636
  • CMIS 5.1
  • EIA-364
  • UL 94, 1581, VW1, File No. E510564
  • RoHS

QSFP56 Active DAC Cable Mechanical Drawings

QSFP56 Active DAC Cable Drawing

QSFP56 Active DAC Cable Product Dimensions

Volex P/N

Cable Length
Cable Gauge
Cable OD
DA50PSG40BA 4.00 30



5.00 30 7.0
DA58PSG50BA 5.00 28



6.00 28 8.5
DA58PSG70BA 7.00 28



7.00 26 9.5


8.00 26


DA56PSG90BA 9.00 26


4-9m lengths available with 26-30 AWG conductor sizes to achieve maximum performance. Options Available:

  • Low Smoke, Zero Halogen (LSZH) jackets
  • Custom colours for pull tab
  • Custom EEPROM mapping

Contact Volex for QSFP56 Active DAC Cable

Contact Volex for further assistance with external QSFP56 active direct attach copper cable.