QSFP28 to 4x SFP28 Passive Breakout DAC Cable

Volex’s QSFP28 passive breakout Direct Attach Cables feature 4 transmitting and 4 receiving channels at 25Gbps per channel speed and support 100Gbps (QSFP28) to 4x 25Gbps (4x SFP28) breakout configurations. The cable assemblies meet 25GbE Ethernet (IEEE 802.3by) standard with substantial signal integrity margin providing high performance and bandwidth interconnect solutions for high-density applications.

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. Volex’s QSFP28 to 4x SFP28 breakout cable assemblies are designed to meet the next-gen data centre needs. The Volex QSFP28 100G/EDR breakout cable pluggable modules are compatible with QSFP-DD, QSFP56 and QSFP28 ports and, for the breakout ends, SFP-DD, SFP56 and SFP28 ports for ease of data centre upgrade.

QSFP28 to 4x SFP28 Passive Breakout DAC Cable Product Highlights

  • Near zero power consumption and no heat generated
  • Complete cable assembly uniquely terminated at the factory to provide the most reliable operation
  • 100% tested for signal integrity with serial number traceability

QSFP28 to 4x SFP28 Passive Breakout DAC Cable Features and Specifications

Product Type 100Gbps (QSFP28) to 4x 25Gbps (SFP28) passive breakout direct attach copper cable
Conductor Treatment Laser stripped conductors
Cable Type High-speed twinax cable, 4-pair differential, 100 +/-5 ohms
Cable Colour Black
Cable Jacket PVC
Packaging PE bag
Power Supply Voltage 3.3V
Temperature Range 0 – 70o C
Retention Force Meets MSA Specifications
Insertion Force Meets MSA Specifications
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.

QSFP28 to 4x SFP28 Passive Breakout DAC Cable Applications

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

Standards Compliance of QSFP28 to 4x SFP28 Passive Breakout DAC Cable

  • IEEE 802.3by
  • SFF-8402, SFF-8431, SFF-8432, SFF-8665, SFF-8661, SFF-8472, SFF-8636, SFF-8679
  • EIA-364
  • UL 94, 1581, VW1, File No. E510564
  • RoHS

QSFP28 to 4x SFP28 Passive Breakout DAC Cable Mechanical Drawings

QSFP28 to 4x QSFP28 Passive Breakout DAC Cable

QSFP28 to 4x SFP28 Passive Breakout DAC Cable Product Dimensions

Volex P/N

Cable Length
Cable Gauge
Cable OD
D440PSG05BL 0.50 30


D440PSG10BL 1.00 30



1.50 30 4.5


2.00 30


D440PSG25BL 2.50 30



3.00 30 4.5
D448PSG35BL 3.50 28



4.00 28 5.5


4.50 26


D446PSG50BL 5.00 26


0.5-5m 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 QSFP28 to 4x SFP28 Passive Breakout DAC Cable

Contact Volex for further assistance with external QSFP28 to 4x SFP28 passive breakout direct attach copper cable.