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QSFP28 100G Passive Copper Cable Assemblies

QSFP28 100G Passive Copper Cable AssembliesEnlarge this image

Product Resources
Part Numbers
Specification Sheet: QSFP28 100G Passive Copper Assemblies
Test Report
Pricing Request


Siemon QSFP28 Passive Copper Cable assemblies exceed 100G Ethernet (100GBASE-CR4) specifications. They are designed for high-density applications, offering a cost-effective, low-power option for high-speed data center interconnects. This next generation product shares the same mating interface with QSFP+ (SFF-8436) form factors, making it backward compatible with existing QSFP+ ports. These direct attach cable assemblies are available in standard lengths up to 5 meters (16.4 ft.) for support of up to 100G Ethernet applications.

  • Positive retention pull-release latch system
  • High-Density QSFP28 connector
  • Ultra low crosstalk for enhanced performance
  • PCB Termination - Laser stripped conductors
  • PCB Termination - Overmold provides additional strain relief to minimize pistoning
  • PCB Termination - Automatic welding for unmatched consistency
  • PCB Termination - Welding results in less dielectric shrink-back than soldering



Standards Compliance

  • Electrical: IEEE 802.3by, IEEE 802.3bj
  • SFF-8636, SFF-8661, SFF-8665, SFF-8679
  • RoHS


  • Ethernet 10G, 25G, 40G, 100G (100GBASE-CR4)
  • Intra-Rack System, Top of Rack (ToR), Middle of Rack (MoR)
  • Switch, Storage, Server, NIC
  • Switch-to-Switch, Switch-to-Server

Part Numbers

  • Q1Q28P300.5-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 0.5m (1.6 ft.), Gauge = 30
  • Q1Q28P301.0-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 1m (3.3 ft.), Gauge = 30
  • Q1Q28P301.5-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 1.5m (4.9 ft.), Gauge = 30
  • Q1Q28P302.0-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 2m (6.6 ft.), Gauge = 30
  • Q1Q28P262.5-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 2.5m (8.2 ft.), Gauge = 26
  • Q1Q28P263.0-01(X) QSFP28 to QSFP28 Passive Copper Cable, Length = 3m (9.8 ft.), Gauge = 26
  • Q1Q28P265.0-01(X)* QSFP28 to QSFP28 Passive Copper Cable, Length = 5m (16.4 ft.), Gauge = 26

Use (X) to specify jacket: L = LS0H, P = PVC

All cables compliant to IEEE 802.3by, CA-N. Will work with or without FEC unless otherwise noted.
*Compliant to IEEE 802.3bj, CA-L. Will work with RS-FEC.

Part Numbers

Because we continuously improve our products, Siemon reserves the right to change specifications and availability without prior notice

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